In non-muscle cells, a small increase in the cytosolic concentration of Ca2 can have a dramatic effect on several physiological processes. The presence of a specific protein in the cytosol, however, activates a Ca2 ATPase that serves to return these elevated cytosolic Ca2 levels back to basal levels, thereby maintaining the cell's normal physiology. Which protein is directly involved in activating this Ca2 ATPase

Answers

Answer 1

Answer:

calmodulin

Explanation:

The calcium-modulated protein (calmodulin) is a calcium-binding receptor protein that modulates contractile proteins (i.e., actin and myosin proteins) of the skeletal muscle and non-muscle cells (e.g., platelets). Calmodulin binds to calcium ions (Ca2+) and subsequently activates a number of Ca2+ dependent enzymes (e.g., kinases or phosphatases), which finally activate/deactivate proteins in the calcium signal transduction pathway. Ca2+-ATPase pumps in the membranes of eukaryotic cells release Ca2+ from the cytoplasm and they are autoinhibited by low Ca2+ levels, while calmodulin-binding releases this autoinhibition and thus activates the pumps. In non-muscle cells such as platelets, calmodulin also mediates Ca2+ control of actin-myosin interaction by phosphorylation of the myosin light chain (MLC).


Related Questions

pushing a chair requires less energy than pushing than pushing a desk because

A. The surface area of the desk is larger.

B. The desk has less mass then then the chair

C. The chair has less mass then the desk

D. The chair is smaller

Answers

Answer:

c

the chair has less mass then the desk

what are the effects of a change in protein? there is 3

Answers

Generally, mutations result in reduced protein function or no protein function. A mutation with reduced function is called a leaky mutation because some of the wild-type function “leaks” through into the phenotype. A mutation that results in no protein function is called a null mutation

Droughts occur due to climate change and elevated temperatures, which in turn may lead to other consequences as well. Imagine that a wildfire happened in the nature reserve. Predict what would happen if such an environmental shift that is so extreme and rapid
hits the nature reserve and the population of deer mice does not have time to adapt. Propose a possible solution for this problem.

Answers

Answer:

Research shows that changes in climate create warmer, drier conditions. Increased drought, and a longer fire season are boosting these increases in wildfire risk. ... Changes in climate add to these factors and are expected to continue to increase the area affected by wildfires in the United States.

What does DNA prove about organism ancestry?
A. Plants and animals are not related to one another

B. That all organisms are related to one another

C. DNA and RNA are completely different forms of genetic coding

D. Extraterrestrial life will have DNA as well

Answers

Answer:

B. That all organisms are related to one another

Answer:

B. That all organisms are related to one another

Explanation:

Fossils, anatomy, embryos, and DNA sequences provide corroborative lines of evidence about common ancestry, with more closely related organisms having more characteristics in common. DNA underlies the similarities and differences in fossils, anatomy, and embryos.

When comparing fossil A to fossil B, which is most likely correct?
Air
Soil
Up
Fossil A
-Fossil B

Answers

Fossil B would most likely be correct in this situation

Mike has a problem with his testosterone. He is unable to produce enough. Which will most likely be affected by his inability to produce testosterone? Select two options.

Answers

Answer:

Fruits will be a great choice. Such as strawberries.

Explanation:

Organelles are specialized structures that perform important cellular functions; they are structures you can generally see only under a microscrope. Which of the organelles below would you expect to find in all living cells?
A) cell membrane
B) cell wall
C) DNA
D) Cytoplasm
E) Nucleus
F) Chloroplasts

Answers

Answer:

I think D which is the cytoplasm

Explanation:

because it is not specific with cell is this off so cytoplasm is there in both the animal cell and plant cell

which feature of stem cells enable them to replace cells in tissues such as skin?

Answers

That is right!!!!! Hope that helped

The feature of stem cell which enable them to replace cell in tissues are that they can divide indefinitely to generate new cells and they can convert into the different types of cells that make up the body as they divide.

What is a stem cell ?

A stem cell is a cell that has the unique capacity to grow into different types of cells in the body.

They may be utilised in the future to replace cells and tissues that have been damaged or destroyed owing to illness.

Stem cells are classified into three types which are Embryonic stem cells, Adult stem cells, Induced pluripotent stem cells.

Embryonic stem cells provide new cells to an embryo as it grows and develops into a newborn.

Adult stem cells generate new cells as an organism matures and replace damaged ones.

Induced stem cells are stem cells created in the laboratory by scientists.

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El estómago es un órgano parecido a un saco que contiene los alimentos y comienza a digerirlos segregando jugo gástrico. ¿De qué sistema o aparato es parte el estomago? *

Answers

Answer:

Sistema digestivo

Explanation:

Los principales sistemas del cuerpo humano son:

Sistema respiratorio, sistema circulatorio, sistema nervioso, sistema inmune, sistema digestivo, sistema óseo, sistema urinario, sistema reproductor y sistema muscular.

Como dice el enunciado, el estómago comienza a digerir los alimentos haciendo parte, así, del sistema digestivo cuya función es digerir los alimentos y absorber sus nutrientes.

What is the role of transport proteins in
active transport?
A. They move molecules against the gradient.
B. They collect molecules of water to assist in the process.
C. They store the ATP needed to power the process.

Answers

I believe it’s A……………………..

Only forager bees leave the nest for their jobs
A
True
B
False

Answers

I think the answer is False

Do you think if the environmental conditions in an area changes that the plants and animals that inhabit that region will change their features to adapt to the changing conditions?

Answers

Answer:

yea

Explanation:

cause our climate conditions changes everyday depends on the atmosphere at that time so if there fire in a forest all the animals there have to adapt to the smoke.

Yes, if the environmental conditions in an area changes that the plants and animals that inhabit that region will change their features to adapt to the changing conditions.

Why plants and animals will change their features?

Plants and animals are fundamentally different in many ways, but one of the most obvious is in how they deal with temperature.The climatic niche of a species reflects where it can live.A species with a wide climatic niche can range widely across many different conditions and may be especially resilient to climate change.Different sets of plant and animal species tend to occur at different elevations, which differ in temperature and precipitation.

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The diagram above illustrates the carbon cycle. Which of the Following components of the diagram represent carbon sinks?
A. marine photosynthesis and respiration
B. volcanoes and soil carbon
C. oceans and fossil carbon
D. factories and photosynthesis

Answers

Answer:

D) Factories and Photosynthesis

Adrenergic receptors Select one: a. can be activated by the release of epinephrine. b. have two structural forms - muscarinic and nicotinic. c. when activated stimulate skeletal muscles to contract. d. can be found in both the sympathetic and parasympathetic divisions. e. are activated by the release of acetylcholine.

Answers

Answer:

The correct answer is  a. can be activated by the release of epinephrine.

Explanation:

Epinephrine is a hormone and neurotransmitter naturally secreted by the body through the adrenal glands, synthesized and stored in the adrenal medulla and released into the systemic circulation. Epinephrine is a non-selective adrenergic agonist, stimulating alpha1-, alpha2, beta1, and beta2-adrenergic receptors. The systemic actions of catecholamines are mediated by the binding of these compounds to plasma membrane receptors, of the GPCR type widely distributed throughout the body and known as adrenergic receptors, which are activated by the catecholamines adrenaline (epinephrine) and noradrenaline . These receptors cause different effects depending on the G protein subtypes to which they are associated and the signal transduction mechanism linked to the specific G protein.

When and where would you expect to find the highest rate of primary productivity

Answers

Answer: Net primary productivity is the amount of gross primary productivity remaining after respiration, which is about 40 and 85 percent. Sloughs and marshes, as well as tropical rain forests, possess the highest rates of net primary productivity; deserts have the lowest.

Explanation:

I explained on the top-

The highest rate of primary productivity in terrestrial environments takes place in swamps and marshes and in tropical rainforests, and in aquatic environments it takes place in algal beds, estuaries, and reefs.  

• In ecology, primary productivity refers to the rate at which conversion of energy to organic substances takes place by the photosynthetic producers that attain energy and nutrients from the sunlight, and chemosynthetic producers that attain chemical energy via oxidation.  

• The majority of the energy assimilated by plants via the process of photosynthesis is not stored as organic substance, however, is utilized at the time of cellular respiration.  

• In the process, the organic components like proteins, carbs, and fats are dissociated to provide energy in the form of ATP for the metabolic needs of the cells.  

• The energy not utilized is stored in the tissues of the plants for future use and is known as the net primary productivity.  

• The highest net primary productivity in terrestrial environments takes place in marshes and swamps and in tropical rainforests, and in aquatic environments it takes place algal beds, estuaries, and reefs.  

These environments are mainly critical for the sustenance of global biological productivity.

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A utility company has proposed building a natural gas power plant next to a lake. The picture below shows the proposed power plant.






The company claims burning natural gas will release only harmless gases such as water vapor (H2O) and carbon dioxide (CO2). Why would environmental scientists disagree with this claim?

A
The emission of carbon dioxide leads to rapid cooling of the Earth’s lakes and oceans.

B
The emission of carbon dioxide leads to an increase in the temperature of the atmosphere.

C
The emission of water vapor leads to a decrease in the humidity of Earth’s atmosphere.

D
The emission of water vapor pollutes the atmosphere, causing harm to plants and animals.

Answers

Answer:  B is right

Explanation: Carbon dioxide is a greenhouse gas which is involved

with increasing temperature of atmosphere

Which of the following can cause evolution to occur? (Select all that apply)

Mutation

If organisms choose a mate for a specific reason

People moving into or out of an area

If the population shrinks

Answers

Answer:

MutationIf organisms choose a mate for a specific reasonPeople moving into or out of an areaIf the population shrinks

Explanation:

These factors are the "forces of evolution." There are four such forces: mutation, gene flow, genetic drift, and natural selection.

These are the factors that can cause evolution to occur:

MutationIf organisms choose a mate for a specific reasonPeople moving into or out of an areaIf the population shrinks

Which structures do plant cells have for making food that animal cells do not?

Answers

Answer:

chlorophyll is the answer

Chloroplasts are the food producers of the plant cell

Which of the following is NOT an example of natural selection? *
A. Plants with thorns are less likely to be eaten by herbivores than other members of the same species that lack thorns.

B. Bacterial populations in hospitals develop resistance to drugs used to combat infection by them.

C. Scientists breed cows that give greater amounts of milk than their ancestors.

D. Fruit fly larvae with an enzyme to break down alcohol are better able to feed on fermenting fruit than those that lack the enzyme.

E. Female fish that produce more eggs leave more offspring than those that produce fewer eggs.

Answers

Answer:

The Answer is C

Explanation:

When scientists breed cows to produce more milk, this has not occured naturally and thus is not natural selection.

Answer:

C. Scientists breed cows that give greater amounts of milk than their ancestors.

Explanation:

The scientists breed cows that give greater amounts of milk than their ancestors is not an example of natural selection. So, option (C) is correct.

What risk is most likely to happen when using wind as an energy source

Answers

Answer:

As with all energy supply options, wind energy can have adverse environmental impacts, including the potential to reduce, fragment, or degrade habitats for wildlife, fish, and plants. Furthermore, spinning turbine blades can pose a threat to flying wildlife like birds and bats.

Which of these organs are parts of the brain?
а) cerebrum
b) cerebellum
c) brainstem
d) all of above

Answers

Answer:

all of above

Explanation:

The answer is all of above







Human sperm and egg cells have ____ chromosomes.
A. 42

B. 21

C. 23

Answers

Answer:

They each have 23 chromosomes

Explanation:

Answer:

C. 23

Explanation:

Human sperm and egg cells have 23 chromosomes.

I’m confused help me pls

Answers

Claim: This process uses expensive fertilizers and pesticides to grow pest free crops which may be produced in excess. Explain the reasons why people would go against growing wheat this way.

Your answer: Here are 3 reasons that go against growing wheat this way.

1. The fertilizers and pesticides are expensive and cost farmers a lot which takes away from the revenue that farmers make from growing the crops in the first place.

2. Other then fertilizers and Pesticides its a lot of work as you can see on the chart throughout the year there are many things you must do too keep crops bug free and pest free this reason I'm explaining says that taking and doing all of this work for not pests/bugs is too much and not needed.

3. Fungicide Is needed a lot and incredibly expensive when you used/spray it on crops that much and point goes a lot more for large crops too.

If these reasons don't work, find factors that or counterclaims that go against this method of harvesting wheat. (This is what your supposed too do)

Adults produce gametes through a type of cellular reproduction called mitosis. The process of a sperm cell and an egg cell fusing together is called fertilizationand produces a zygote. As a zygote undergoes rapid cell division to develop into an embryo, fetus, and eventually baby, the type of cellular reproduction being used is . As a baby grows into an adult, the type of cellular reproduction used is mitosis.

Answers

Answer:

Mitosis.

Explanation:

Mitosis is the type of cellular reproduction which is used in order to develop an embryo, fetus, and eventually baby. In mitosis type of cell division, the parent and mature cells divides into two daughter cell. This type of cell division occurs in somatic or body cells whereas meiosis type of cell division occurs in the sex cells which produces four daughter cells from a single parent cell.

Explain how different types of cells help organisms live and grow?
Different types of cells have different jobs that are necessary to keep organisms alive.
Different types of cells are only found in specific types of organisms.
Cells are necessary in order for all organisms to grow big and hunt for their food source.
Cells provide support for all organisms to be able to move.

Answers

Answer:

Different types of cells have different jobs that are necessary to keep organisms alive. And cells also give the living animal more support. They also hold the genetic information of that organism in their nucules. This is with most cells but bacteria cells do not contain nucules.

What organelle reforms around the chromatids at opposite ends of the cell?

A. Chloroplast

B. Vacuole

C. Centriole

D. Nucleus

Answers

The answer to your question would be: Nucleus

Crossing over occurs during Prophase II.

A. True

B. False

Answers

False
crossing over occurs in prophase 1 of meiosis 1. The significance of this crossing over is to ensure cell differentiation. If this occurred in prophase two it means the cells in meiosis 1 will be identical.

Answer:

B. False

Explanation:

Crossing over not occurs in prophase II. It occurs only during prophase I.

Why do identical twins separated at birth show DIFFERENCES as seen in the pictures?

A. Their DNA changed because of the different environments they lived in.

B. Different genes were turned on or off because of he different environments they lived in.

Answers

Answer:

B. Different genes were turned on or off because of the different environments they lived in.

Explanation:

Your DNA does not change but it can turn on some parts and off others depending on your enviroment.

Answer:

B. Different genes were turned on or off because of he different environments they lived in.

Explanation:

The identical twins separated at birth show different genes were turned on or off because of he different environments they lived in.

Starch is a polysaccharide used as a component of cell walls in plants.


True

False

Answers

Answer:

false

Explanation:

is type of carbohydrates

False. Starch is a polysaccharide used as an energy storage molecule in plants, but it is not a component of cell walls.

What are structural component of cell wall?

Cell walls are structural components found in the outermost layers of cells in plants, fungi, and some bacteria. They provide support and protection for the cell, and are composed of a variety of different biomolecules, including cellulose, pectin, and lignin.

Starch, on the other hand, is a complex carbohydrate that is synthesized and stored in the cells of plants, particularly in the seeds, roots, and tubers. It is made up of long chains of glucose molecules and is used by plants as an energy source, particularly during times when the plant does not have access to light for photosynthesis. Starch is not a component of cell walls.

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Which of these is an abiotic factor in a rainforest ecosystem?
Tree cover
Biodiversity
Trophic levels
Precipitation

Answers

I'd say precipitation, it won't be alive though so biodiversity is wrong
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