The comments made concerning hormones are accurate because they are transported by the bloodstream.
The ideal answer is C.
Which of the following is true regarding hormones?The actual statement regarding hormones is: b. Receptors on target cells interact with hormones. Endocrine glands produce and release hormones into the bloodstream, where they find their way to the cells they are intended to affect.
Are there any organs in the body where hormones are specifically directed?When released into the bloodstream, hormones work as chemical messengers that affect an organ in a different section of the body. Despite the fact that hormones affect every area of the body, only target cells with the right receptors may react.
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unlike b lymphocytes, t lymphocytes do not generate a secreted form of their antigen receptors
Self-reactive antigen receptors may be produced by the random process that produces lymphocyte antigen receptors.Several of these possibly self-reactive lymphocytes are removed during lymphocyte development,
Why does the antigen receptor exist?It serves as a receptor that identifies and binds antigen through the exposed V regions on the cell's surface, sending a signal that activates B cells, triggering clonal growth and the production of specific antibodies.
Describe the three antigen receptors?A co-receptor complex made up of at least three cell-surface molecules—CD19, CD21, and CD81—modifies the signaling of B-cell antigen receptors.
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in a study of the forces involved when motor proteins
Motor proteins also produce force locally within the network of cytoskeletal polymers, which transmits these forces to determine the shape of each cell and, ultimately, the architecture of tissues and whole organisms. Chapters 37 to 39 and 44 illustrate how motors move cells and their parts.
Correctly label the following anatomical features of a neuron. Axon Axon terminals Myelin sheath Soma Internode Nucleus Node of Ranvier Dendrites Nucleolus
A neuron is a specialized cell, found in the brain, spinal cord and the peripheral nerves known as the nerve cell. The structure of a neuron varies with their shape and size and it mainly depends upon their functions
what is the structure of neuron ?Dendrites which is A branch-like structure that functions by receiving messages from other neurons and allow the transmission
Cell Body has a cell body with a nucleus, Golgi apparatus, endoplasmic reticulum, mitochondria and other components.
Axon is a tube-like structure that functions by carrying an electrical impulse from the cell body to the axon terminals
Synapse functions by permitting the entry of a neuron to move an electrical or chemical signal from one neuron to another neuron.
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many people believe that taking zinc lozenges reduces the severity and duration of the common cold. sebastien decides to conduct a study at his school to explore this claim. he sends a survey to a simple random sample of 100 students, asking them to if they took zinc lozenges or not during their last cold, and how long they experienced cold symptoms. he found that students who took zinc had a mean cold duration that was 1.2 days lower than those who did not take zinc. which of the following statements about his study is true?
Sebastien's study is subject to confounding.
What are zinc lozenges?
A well-liked remedy for the common cold is zinc. According to some studies, zinc lozenges may shorten colds' duration by one or two days and may lessen the incidence of upper respiratory infections. Zinc aids in wound healing and infection prevention. Treatment of the common cold with zinc gluconate lozenges, using adequate doses of elemental zinc, may be effective in reducing the duration and severity of cold symptoms. If the lozenges are started as soon as symptoms appear, the benefit seems to be at its greatest. The formulation of the lozenges also appears to be important because the addition of citric acid or tartaric acid may reduce efficacy due to the chelation of zinc ions.
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art-labeling activity main nerves of the brachial plexus
The art-labeling activity main nerves of the brachial plexus is given in the image attached.
How many nerves does the brachial plexus have?There are five main nerve branches that branch off from the brachial plexus and travel down the arm: cutaneous nerve of the muscles: flexes muscles in the upper arm at the shoulder and elbow and originates from nerve roots C5 to C7.
The radial, musculocutaneous, median, ulnar, and axillary nerves are the brachial plexus' five terminal branches.
Note that the network of nerves called the brachial plexus is what carries signals from the spinal cord to the shoulder, arm, and hand. A brachial plexus injury happens when these nerves are compressed, stretched, or in the most severe scenarios, torn apart or severed from the spinal cord.
Therefore, one can say that for the motor and sensory innervation of the upper extremities, including the shoulder, arm, and hand, the brachial plexus is said to be a significant network of nerves that transmits signals.
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Which of the following is an example of a population? a. all individuals of the same species in an area b. all the species that can interact in an ecosystem c. a community and its interaction with the physical environment d. the part of Earth that supports life
Answer:
A. All individuals of the same species in an area
Design a Device That Minimizes the Force on an Object During a Collision
In this project, you will design, evaluate, and refine a device that minimizes the force
on an object during a collision. You should apply scientific ideas to develop your
device and try to avoid unanticipated effects. Apply the law of conservation of linear
momentum to the situation in which your device should be used, and compare the
velocities and momenta of objects in the system. Note that the total momentum of a
system can change, but the change is balanced by the momenta of objects outside
the system. In your design, you should specify any criteria and constraints, such as
limiting risk. You should be able to quantify how your design satisfies these criteria
and constraints. You may have to break down complex criteria into simpler ones and
prioritize certain criteria over others.
Background
An object's momentum is based on the mass and velocity of the object. The more
momentum the object has, the harder it is to stop the object or change its direction.
The equation for momentum is p = my, where p is momentum, mis mass, and vis
velocity. When a force is applied to an object, the object's velocity changes.
Answer: W h a t
Explanation: confusion
Drag each label into the appropriate position to identify whether the statement depicts something true or false about the specimen pictured below: - contains connective tissues- visible directional orientation of collagen fibers- found in areas where bones are joined via cartilage- same tissue category as blood- a larger portion of extracellular matrix to cells- functions to resist shock; - seen in tendons
- contains dense irregular connective tissue
- contains a perichondrium
- chondrocytes in clusters of 3-4 arranged in clumps
TRUE Statement
- contains connective tissues
- visible directional orientation of collagen fibers
- found in areas where bones are joined via cartilage
- same tissue category as blood
- a larger portion of extracellular matrix to cells
- functions to resist shock
FALSE Statement
- seen in tendons
- contains dense irregular connective tissue
- contains a perichondrium
- chondrocytes in clusters of 3-4 arranged in clumps
What is perichondrium?
The cartilage of growing bones is surrounded by a layer of dense, wavy connective tissue called the perichondrium. It is made up of an inner chondrogenic layer and an exterior fibrous layer. Fibroblasts in the fibrous layer create collagenous fibers. The chondrogenic layer can produce chondroblasts and is yet undifferentiated. Both hyaline cartilage and elastic cartilage have perichondrium at their edges.
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what feature of fats makes them hydrophobic
Place the following events of a reflex arc in the correct order 1) motor neuron activation 2) sensory neuron activation 31 sensory receptor activation 4) information processing 5) effector response
a. 4.3.1.2.5 b. 1.5.3.2.4 c. 3.2, 1.5,4 d. 2,3,4,5, 1
e. 3.2, 4.1.5
The event of a reflex arc in correct order 3,2,4,1,5
( sensory receptor activation, sensory neuron activation, Information processing, motor neuron activation and effector response)
The neural pathway that is followed by a reflex response is called the reflex arc. The reflex arc is demonstrated by what occurs when we unintentionally contact something hot. The receptor is the first to notice a change in temperature. The relay neuron, which is located in the spinal cord, is then delivered electrical impulses. Motor neurons are linked to sensory neurons by these latter. The motor neuron transmits electrical impulses to an effector. The effector produces a reaction.
Hence, the neural system that triggers a reflex action is known as the reflex arc.
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Plants use the green pigment chlorophyll to a. absorb sunlight. b. store sunlight. c. reflect sunlight. d. change light to heat.
Answer: A
Explanation:
arginase, a key enzyme in liver urea production, requires four ____ atoms per molecule. group of answer choices iron copper zinc manganese
Ceruloplasmin is one illustration; it has eight copper atoms per molecule. Copper and zinc provide as examples of the needs for and toxicity of important trace elements.
What trace mineral is necessary for gluconeogenesis' primary enzyme to be activated?Manganese is a trace mineral that functions as a cofactor for enzymes that produce urea, cholesterol, and glucose (gluconeogenesis) (amino-acid catabolism in the liver).
Which Micromineral is deemed crucial for healthy brain function?The liver, kidney, pancreas, and bones are where manganese is primarily deposited. and contributes to the regulation of blood sugar, calcium absorption, and fat and carbohydrate metabolism. For healthy nerve and brain function, manganese is also essential.
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Maltase is an enzyme that is not able to catalyze the synthesis of lipids because maltase.
Due to its unique active site, the enzyme maltase is unable to catalyze the production of lipids. One enzyme that particularly reacts with maltose is called maltosease (a sugar molecule). Because maltase has a unique active site, it is an enzyme that cannot catalyze the creation of lipids.
The biological molecules known as enzymes serve as catalysts in living things. They have a proteinoid makeup. The following characteristics of enzymes are listed The processes that enzymes catalyze do not affect them in any way. Enzymes work on particular substrates because they are substrate-specific. pH and temperature catalyze affect how well enzymes work.
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the triads of a muscle fiber consist of __________.
A triad is made up of three notes stacked in subsequent thirds. A triad is also known as a harmony or a chord. (Chord progressions are another example of harmony.) The root is the lowest note of a triad when it is stacked in thirds.
What the triads of a muscle fiber posses?The terminal cisterna, T-tubule, and sarcoplasmic reticulum are the three structures that surround the myofibrils and make up the triad.
Therefore, Actin and myosin, two protein structures, are found in the myofibrils. In a muscle cell, the sarcomere serves as a structural and functional unit.
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which choice below is the correct phylogenetic order from largest, most inclusive group to smallest, most exclusive group? group of answer choices ecdysozoa > arthropoda > protostomia > insects protostomia > ecdysozoa > arthopoda > insects ecdysozoa > protostomia > arthopoda > insects arthropoda > protostomia > insects > ecdysozoa
Phylogenetic order from the largest most inclusive group to the smallest and most exclusive group: Protostomes > Ecdysozoa > Arthropods > Insects.
Phylogeny is a classification description that shows the kinship relationship of a species with its ancestors and the evolutionary relationship between organisms.
Protostomes are divided into two groups:
Lophotrochozoa - these include segmented worms, mollusks, lophophores and several more obscure phyla.Ecdysozoa include arthropods and several other phyla that occasionally molt.Arthropods are triploblastic protostomes. They also have a nervous system with a dorsal "brain", an oropharyngeal nerve, and a pair of ventral nerves. Like annelids, their bodies are segmented both internally and externally. This is taken as evidence that annelids and arthropods are closely related. We now believe that segmentation is a convergent property.
Insects are the most successful group of organisms on the planet. Every third species of organism is an insect. During its development, the insect acquires several features that contribute to its success. The earliest insects lacked wings: The evolution of insect wings was a milestone - the first creatures to soar into the sky ruled the skies for 100 million years.
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sexual reproduction in humans .group of answer choicesallows a haploid sperm cell to fertilize a haploid egg cellproduces a haploid individualproduces an individual with 23 chromosomescombines two diploid gametes, producing a zygote
Sexual reproduction in humans is A. allows a haploid sperm cell to fertilize a haploid egg.
The human reproductive system occurs through the fertilization process, namely the meeting of male gametes and female gametes. The fertilization process will produce a zygote, the zygote then undergoes embryonic development until it is born as a child.
The fertilization process begins with the maturation of the egg and spermatozoa. During ovulation, the spermatozoa penetrate the corona radiata until the sperm attaches to the zona pellucida. When the spermatozoa successfully penetrate the zona pellucida, oocyte fusion will occur. Haploid sperm cell to fertilize the haploid egg. The union of the ovum and spermatozoa triggers the start of mitotic division which will produce up to 32 cells called morula which will develop into a blastocyst.
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which of the following is most closely related to a lizard? group of answer choices salamander bird lamprey chimaera
The choice of animal most closely related to lizards is the salamander.
Explanation of lizards and salamandersSalamanders and lizard are tetrapods. Both are cold blooded vertebrate animals. Both salamanders and lizards are similar in appearance. But, Salamanders and lizards are ectotherms or cold-blooded animals which means they cannot generate their own body heat like mammals. To control their body temperature, salamanders and lizards get heat from their surroundings.
Salamanders are amphibians with moist skin without scales. Lizards are reptiles with rough, scaly skin. Salamanders live in humid environments while lizards are adapted to live in terrestrial environments. The main difference between salamanders and lizards is the phylogenetic adaptation of the two types of animals.
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which of these is evidence that eukaryotic genes are regulated independently instead of in units like operons?(1 point) responses each gene has its own promoters and set of transcription factors. each gene has its own promoters and set of transcription factors. genes use a common promoter and a common set of transcription factors. genes use a common promoter and a common set of transcription factors. genes use a common promoter, but each has its own set of transcription factors. genes use a common promoter, but each has its own set of transcription factors. each gene has its own promoter, but they use a common set of transcription factors. each gene has its own promoter, but they use a common set of transcription factors.
Each gene has its own promoters and a set of transcription factors is the correct option.
In prokaryotes and eukaryotes, are genes regulated individually?
Prokaryotic cells regulate gene expression only at the transcriptional level, whereas eukaryotic cells control gene expression at the epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels.
Because eukaryotic genes are not organized into operons, each gene must be regulated separately. Furthermore, eukaryotic cells contain much more genes than prokaryotic cells. Gene expression can be regulated at any stage as DNA is transcribed into mRNA and mRNA is translated into protein.
Therefore, Each gene has its own promoters and transcription factors, indicating that eukaryotic genes are regulated independently rather than in groups like operons.
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what feature of fats makes them hydrophobic
Answer:
long hydrocarbon chain
Explanation:
hope it helps!;)
пока!
Answer: carbon chain and nonpolar covalent bonds
Explanation:
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is there a difference between motor commands going to skeletal muscles amd motor commands going to visceral organs? locate the spinal cord where the two different types of motor commands originat from
The skeletal muscle is the sole voluntary muscle in the human body. Every voluntary physical motion, including speaking or running, requires skeletal muscle. Visceral muscle is found inside blood arteries, the stomach, as well as other vital organs.
What carries signals from the spinal cord that control movement?
The spinal cord serves as a conduit for communications between both the body and the CNS. The head and neck are directly connected to the brain through the cranial nerves, but the spine receives sensory information and transmits motor instructions to the body via the spinal nerves.
The primary motor cortex is found in the precentral gyrus of the frontal lobe. This area is where the majority of the brain impulses that eventually cause the execution of voluntary actions are generated.
Therefore, The spinal cord serves as a conduit between the body and the CNS.
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electrons excited in photosystem ii help the chloroplast produce
As excited electrons move through the electron transport chain, NADPH is created.
The photosystem II's source of the excited electrons is what?A chlorophyll molecule's excited electron is moved to the an electron acceptor at the reaction center.It's an oxidation-reduction reaction right now.An electron from water is used in photosystem II to replace the electron lost from the reaction center.
What is produced during photosynthesis by photosystem 2?In oxygenic photosynthetic organisms, photosystem II is the first membrane protein complex.It uses light energy to catalyze the oxidation of water, which results in the production of atmospheric oxygen.
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Which is not true about all
of these elements?
Answer:
A. They are all in the same group B. They all have the same number of valence electrons C. They all have the same number of protons D. They all share similar properties
Explanation:
desert pupfish live in springs of the american southwest. today, there are about 30 species of pupfish, but they all evolved from a common pleistocene ancestor. the southwestern united states was once much wetter than it is now, and the pleistocene pupfish flourished over a wide geographic area. over thousands of years, however, the sierra nevada mountain range was pushed upward by geological forces, blocking rainfall from the pacific ocean. as the large lakes dried up, small groups of pupfish remained in springs and pools fed by groundwater seepage. now, although many of these small springs still have pupfish, each population, through evolution, has become very different from populations of pupfish in other springs.
The isolated populations had restricted gene pools.
Evolution is alternate in the heritable traits of biological populations over successive generations. Those traits are the expressions of genes, which are passed on from figure to offspring in the course of reproduction. Evolution is crucial as it explains how existence developed on this planet and how specific species are connected.
Many scientists trust that RNA, or something much like RNA, became the primary molecule on the earth to self-reflect and start the process of evolution that led to extra advanced sorts of lifestyles, such as human beings.
Homo sapiens or modern guys emerged 250000 years ago. The evolution of human beings has taken around 5 million years.
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Which statement about DNA replication is CORRECT?
A). DNA ligase helps assemble the leading strand.
B). The leading strand is built continuously, and the lagging strand is built in pieces.
C). The leading strand is one of the strands of parental DNA.
D). The lagging strand is built continuously.
E). The lagging strand is one of the strands of parental DNA.
The leading strand is built continuously, and the lagging strand is built in pieces, is the correct statement.
What is the DNA replication process ?
A double-stranded DNA molecule is copied during DNA replication to create two identical DNA molecules. Replication is a critical process because, once a cell splits, the two new daughter cells must contain the same genetic material, or DNA, as the parent cell.
The ability of each DNA strand to operate as a template for duplication is vital to the replication process. DNA double helix unwinding happens at defined places, known as origins, where DNA replication begins. The creation of a primer, a short RNA segment that acts as the starting point for the synthesis of new DNA, is the next step. A protein called DNA polymerase then replicates the DNA by matching its base composition to that of the original strand. The RNA primers are switched out for DNA once synthesis is finished, and any gaps between freshly produced DNA segments are filled up by enzymes.
Since DNA replication is a crucial operation, the newly created DNA is checked by the cell for errors or mutations before replication begins. A cell can divide into two identical duplicates, each of which has the original DNA, once its DNA has been duplicated.
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TRUE/FALSE. modification of rhizobacterial populations by engineering bacterium utilization of a novel plant-produced resource.
Modification of rhizobia populations by bacterial manipulation (engineering) of new plant resources is True.
Can bacteria be engineered?Bacteria are constructed according to synthetic biology design and plasmid introduction or genome modification. In vitro co-culture systems can be used to rapidly characterize and develop effective genetically modified bacteria.Our bodies are home to several species of bacteria that help us maintain our health and well-being. Manipulating these beneficial bacteria to alter the activity of aberrant genes by either disabling or activating them is a promising approach to improving health and fighting disease.How do rhizobia help plants?Beneficial rhizosphere bacteria were used to improve water and nutrient uptake, and abiotic and biotic stress tolerance. Many soil bacteria have been reported to promote plant growth and development, but the modes by which bacteria exhibit beneficial activity are poorly understood.
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Assuming ri, r2 are negative constants and that $1,2, and $2,1 are positive constants, what do the following equations represent? 1 dN1 = ri + $1,2N2 Ni dt 1 dN2 = r2 + 82,1N1 N2 dt a. Competition b. Predation c. Facultative mutualism d. Obligate mutualisme.
Assuming a, r2 are negative constants and that $1,2, and $2,1 are superb constants choice D obligates mutualism.
D. Obligate mutualisme.
crosses x-axis --> 1 species relies upon on the alternative/ negative population increase at some unspecified time in the future.
The negative constant time period is n. If n is wonderful, the graph of a line with slope m intersects the y-axis above the starting place at (0, n) If n is bad, the graph of a line with slope m intersects the y-axis under the foundation, at (0, n). The phrase "tremendous linear feature" isn't used.
The regular can be high quality or negative. If for a few purposes we already know it is able to simplest have values such as 1 and –1, we may say it equals ±1. Mathematical symbols are used mostly for comfort they do not make anything greater correct.
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People infected with chlamydia are often symptom-free, which increases the chance of their infecting other people. True False
True
Even in the absence of symptoms, chlamydia may create serious problems.
There is evidence that chlamydia raises the risk of contracting other STIs, including HIV and gonorrhea.
It's important for women to be tested for chlamydia because it may cause pelvic inflammatory disease, which can spread to the uterus, fallopian tubes, and ovaries (PID). Lower abdomen discomfort, heavier and more painful menstrual cycles, fever, and vomiting are all potential symptoms of PID. Scar tissue forms in PID, which can lead to either a complete blockage of the fallopian tubes and subsequent infertility or a partial blockage and subsequent tubal (ectopic) pregnancy.
Epididymitis, an infection of the testicles, may result from untreated chlamydia in men.
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if you have a choice of what you are going to hit in a crash, hit the object ___________
if you have a choice of what you are going to hit in a crash, hit the object the least force.
What is force ?
Force is either pushing or pulling of any object resulting from the object’s interaction or movement, without force the objects can not be moved, can be stopped or change the direction.
It is a quantitative interaction between two physical bodies, means an object and its environment, there are different types of forces in nature.
If an object in its moving state will be either static or motion, the position of the object will only be changed if it is pushed or pulled and The external push or pull upon the object called as Force.
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fossilized tree sap, also known as blank, prevents scavengers, water, and oxygen from getting to the organism and destroying its remains.fossilized tree sap, also known as blank, prevents scavengers, water, and oxygen from getting to the organism and destroying its remains.
fossilized tree sap, also known as amber, prevents scavengers, water, and oxygen from getting to the organism and destroying its remains.
Amber is a fossilized tree sap that has been prized since Neolithic times for its color and natural beauty. Amber has long been valued as a gemstone, and it is now used to create a variety of decorative objects. Tree resin is a fluid (Sap) produced by plants (most commonly trees), but it is not the same as sap. Sap is a watery, sweet substance, whereas resin is thicker and stickier. Frankincense, Myrrh, Benzoin, and Copal are examples of well-known resins.
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