Tetrodotoxin is a potent toxin found in a variety of organisms including the pufferfish. The toxin binds to the extracellular side of the Na+ channel and prevents channel opening. This leads to paralysis of muscles, including the diaphragm. Death from respiratory failure can occur after ingestion of as little as 1 mg of the toxin. Why does this toxin cause paralysis? Question 7 options: The axon membranes become over-depolarized. The Na+ channels remain in the inactive, refractory state. The Na+ channel does not open wide enough to allow enough Na+ through the channel. The membrane depolarization is not amplified along the axon.
Answer:
The correct answer is - The membrane depolarization is not amplified along the axon.
Explanation:
Tetrodotoxin, a neurotoxin present in the liver and gonads of Marine organisms. it can inhibit the soidum channels which means it blocks the entering of the sodium in the cells or neurons if consumed it and it can lead to neurological and gastrointestinal disorders.
These toxins block the signals to move along the nerves to muscles In absence of sodium action potential cannot be sent along the axon by blocking the sodium channels. This results in weakening and paralysis.
How is grazing food chain different from detritus food chain? Explain with examples.
Microbeads are tiny, smooth, plastic spheres found in common household products such as facial soap. These beads, measuring from 0.0004 to 1.24 mm, roughly the size of some fish eggs, are too small to be removed by water treatment systems. Thus, they end up in rivers, lakes, and other bodies of water. The accumulation of these microbeads is an environmental concern for aquatic biologists because microbeads
(1) make the lakes and rivers cloudy and dirty, affecting their appearance
(2) may stick to some household water pipes, preventing drainage problems
(3) could be mistaken for food by some species, working their way up the food chain
(4) could clog fishing nets, affecting the ability of fishermen to catch fish
Answer:
(3) could be mistaken for food by some species, working their way up the food chain
Explanation:
Microbeads, such as other microplastics, can affect wildlife in many ways, but mostly by
IngestionIntroduction and transference in the trophic webInteraction with other contaminantsMicroinvertebrates, bacteria, and viruses colonize these microplastics and can be transported long distances.Organisms like mollusks, crustaceans, fishes, birds, turtles, among many others, might confuse these elements with food and eat them. Microbeads might float or accumulate in sediments and be ingested by different benthonic species. The ingestion of microbeads by inferior links in the trophic web means a direct entrance in the trophic web where many superior links are affected too while feeding with already contaminated prey.
The ingestion of microbeads can cause a significant impact on the growth, development, and reproduction of freshwater and seawater species.
Microbeads, like other microplastics, characterize for their durability in time and resistance, which means that the ones that are already in the oceans and rivers will last there for centuries.
You consistently eat more Calories than you expend each day. In the short term, this extra energy is stored as _____, and in the long term it is stored as _____. Please choose the correct answer from the following choices, and then select the submit answer button. glycogen; fat protein; fat starch; fat sugar; glycogen glycogen; protein
In the short term is is stored as glycogen in the long term it will be stored as fat.
What pulls the chromosomes apart in anaphase?
A. Fishing Line
B. Life Choices
C. Scorpion's Spear (Get Over Here!)
D. Spindle Fibers
Answer:
D. Spindle Fibers
Explanation:
During anaphase, the centromeres of each chromosome split and the mitotic spindle pulls the sister chromatids apart.
Question
What pulls the chromosomes apart in anaphase?
Choices
A. Fishing Line
B. Life Choices
C. Scorpion's Spear (Get Over Here!)
D. Spindle Fibers
Answer
Among the given choices above the correct answer is D. Spindle Fibers.
Explanation
During the process of anaphase, the centromeres of each chromosomes are start to split and the mitotic spindle pulls the sister chromatids apart.
#LearnwithBrainly
PLS ANSWEr NOWWWWWWWWWWWWWWW
Answer:
The answer for the third picture I believe is decomposers
Answer:
I believe that it's the last answer
An ecosystem is when plants and animals interact with each other in a specific area.
Help me with this question
Answer:
im sorry im not sure but i think its C
Explanation:
А
В
С
H
G
E
E
Which organelle is labeled A
i think its animal cell?
Why did Gregor Mendel use peas in his experiments?
Peas grow very slowly.
Pea reproduction cannot be controlled.
Peas normally produce very few offspring.
Peas have characteristics that have two forms.
Answer:
He used peas because they are self pollinating,they grow fast,and they have many traits
Answer:
D. Peas have characteristics that have 2 forms
Explanation:
Edge 2022.
which is not true about fungi
1 rgey lacks chlorophyll
2 they have myceliumption 2
3 they lacks cell wall
4 they stores food as glycogen
4 they stores food as glycogen
what law out of newtons law is this statement ? please help
( The phone will hit the ground and the ground will push up with the same force. With a case, it is increasing the amount of time the phone hits the ground. This means the reaction force will be less.)
Answer:
Newton's Third Law
Explanation:
Newton's Third Law is: If object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
In this case, Object A is the Phone, and Object B is the ground. When the phone(Object A) hits the ground(Object B), the ground pushes up on the phone making the time increase and makes the reaction force less. Hope this helps!
When a genotype of a guinea pig is "Hh" (select all that are true)
One chromosome of the homologous pair has a sequence that results in hair and one chromosome has a sequence that results in no hair
One copy of the "H" allele on the homologous chromosome is enough to make the guinea pig have hair since both alleles are transcribed and translated
Only one of the chromosomes in the homologous pair carry the genetic sequence to make hair
Both chromosomes in the homologous pair carry the genetic sequence to make hair
Answer:
One chromosome of the homologous pair has a sequence that results in hair and one chromosome has a sequence that results in no hair
One copy of the "H" allele on the homologous chromosome is enough to make the guinea pig have hair since both alleles are transcribed and translated
Only one of the chromosomes in the homologous pair carry the genetic sequence to make hair
Explanation:
Hairy is dominant over hairless. If there was a hairless guinea pig here instead, we would know its genotype. It would be hh. Remember any time a dominant allele is present it is expressed in the phenotype, so if the phenotype is not the dominant one, we know the genotype must contain two recessive alleles.
These are the factors that is true, When a genotype of a guinea pig is "Hh"
• One chromosome of the homologous pair has a sequence that results in hair and one chromosome has a sequence that results in no hair
• One copy of the "H" allele on the homologous chromosome is enough to make the guinea pig have hair since both alleles are transcribed and translated
• Only one of the chromosomes in the homologous pair carry the genetic sequence to make hair
What are the chances a
heterozygote passes on
either a dominant or
recessive allele?
Answer:
A parent with one copy of a dominant allele and one recessive coded Ww for the widow's peak is called heterozygous for a trait and has a 50 percent chance of passing on the dominant allele to each of his or her offspring, regardless of the gene inherited from the other parent.
Explanation:
hope this helps in some way sorry if it does not
How do particles move when a surface wave passes through a medium?
A. Parallel to the direction of wave motion
B. Perpendicular to the direction of wave motion
C. Both parallel and perpendicular to the direction of wave motion
D. Neither parallel nor perpendicular to the direction of wave motion
Answer:
perpendicular to the motion of the wave.
Explanation:
when in a medium, they only go up and down or back and forth meaning the wave won't ever move the left or right side of the particles, so it is perpendicular
hope this is trusted helper for brainly material
Answer: it’s both parallel and perpendicular to the direction of a wave motion
Explanation:
What happens if a protein-digesting enzyme is mixed with starch solution?
An invasive species the spiny water fea, was recently found in a New York lake These water feas eat zooplankton a food also consumed by native fishes. The
Das spread trom lake to take by attaching to fishing lines anchor ropes, and boats which statement best describes the effect of the water tea on the lake?
It will not compete with animals in the local food chain
It will feed on organisms that are important to other species
The number of water teas will decrease due to a lack of food
There will be no effect on native species in the lake
Answer:
It will feed on organisms that are important to other species
Explanation:
Its an invasive species that is stealing food.
Which is not a major reservoir of carbon?
O rivers and lakes
O oceans
O living things
O fossil fuels
Answer:
i think its fossil fuels but dont dont quote me on that
How is gene cloning helpful in biological research??
Answer:
Biologists frequently utilize DNA cloning in basic research labs to create fake, recombinant versions of genes to better understand how normal genes in an organism function.
Explanation:
Took the lesson on Khan Acdemdy, its from my notes i took
Question 5 of 10
Which is caused by the uneven heating of air?
A. Altitude
B. Wind
C. Humidity
D. Rain
SUBMIT
Need help ASAP
Answer:
B. Wind
Explanation:
Wind is the movement of air, caused by the uneven heating of the Earth by the sun and the Earth's own rotation. Winds range from light breezes to natural hazards such as hurricanes and tornadoes.
Study the image of ammonia. How many atoms of each element bond together to create this molecule?
please help..
its sciences
From the image, we can see that:
3 atoms of Hydrogen element and 1 atom of Nitrogen element bond together to create Ammonia molecule.
What is the name of the organelle labeled with the letter A?
A
B
o
ה ס ד ה I
N
M
к
Animal cell
Answer:
the label letter A is lysosome
Which of the following is true about the group Archaea?
A. Archaea has more genetic similarities to Bacteria than Eukarya
B. Archaea and Bacteria both have a nucleus
C. Bacteria and Eukarya are both prokaryotes
D. Archaea has more in common genetically with Eukarya than Bacteria.
Answer:
D. Archaea has more in common genetically with Eukarya than Bacteria.
Explanation:
Archaea are unicellular, prokaryotic microorganisms that differ from bacteria in their genetics, biochemistry, and ecology. Some archaea are extremophiles, living in environments with extremely high or low temperatures, or extreme salinity. Only archaea are known to produce methane.
Answer:
D. Archaea has more in common genetically with Eukarya than Bacteria.
Explanation:
Yes, archaea has more in common genetically with Eukarya than Bacteria. Archaea constitute a domain of single -celled organisms.
PLEASE HELPP!!! Brainiest answer :))) thanks sm
Answer:
50% <3
Explanation:
1: Which two parts of the taxa do we use to name organisms?
2: List and describe each of the three Domains.
3 List and describe the four kingdoms in the Eukarya Domain.
Which two substances are among the four major types of organic compounds made by living things?
A:Carbohydrates
B:Potassium
C:Water
D:Proteins
What could be inferred from suntans?
Group of answer choices
A tan might indicate sun damage to the skin.
Tanning produces healthier skin.
A tan strengthens the elastic in the skin.
Tanning makes skin look younger.
Answer:
A tan might indicate sun damage to the skin.
Explanation:
Tanning is the process by which the skin is exposed to the ultraviolet rays that comes from the sun with the purpose of producing a dark-brown coloration called a TAN.
A tan achieved by exposure to the sun can actually indicate that a person's skin is undergoing damage from the UV rays of the sun, hence, the skin responds by producing a protein called melanin, which protects the skin and later forms the dark coloration- tan. From this explanation, tan is got in response to a damaging signal received by the cell, hence, a tan might indicate sun damage to the skin.
Which statement best describes energy entering the living world?
a) solar energy to chemical energy
b) chemical energy to solar energy
c) solar energy to heat energy
d) heat energy to solar energy
Answer:
a. solar energy to chemical energy
Answer:
A .Solar energy to chemical energy
Explanation:
What other major body system is a DIGESTIVE system working with closely?
Answer:
circulatory system
Explanation:
Where do you think the nutrients from the food that you eat go after digestion? The entire point of eating is to get energy and nutrients tot he other parts of the body and to do that you need the circulatory system.
interesting biology project topic
Answer:
Vacina ( eu estou aprendendo sobre isso na minha aula, e acho que seria legal por que é uma coisa muito discutida atualmente)
Which statement is a hypothesis?
A. The presence of an enzyme increased the reaction rate
B. The reaction rate increase 100% once the enzyme was introduced
C. Introducing an enzyme into a reaction did not increase the rate of reaction
D. When an enzyme is introduced into a reaction the reaction rate will increase by 100%
