Why is diffusion important for cells? Why is diffusion important for cells?

Answers

Answer 1

Answer: Diffusion is essential for cells to bring nutrients and releasing wastes WITHOUT spending energy. This is accomplished by the "urge" of a system to achieve equilibrium, which means that materials tend to flow from high concentration to low concentration area. For example, if a cell lacks amino acids, and therefore has a low concentration of it inside the cell compared to the outside, then by diffusion, the amino acids outside will flow in through the membrane until the concentrations of amino acids outside and inside the cell are the same. All these are done without spending energy from the cell. Note, however, that simple diffusion cannot transport larger particles or those insoluble in lipids; these materials have to be transported with facilitated diffusion, where a carrier on the membrane of the cell will help bring in the materials.
Diffusion is when particles in a more concentrated area move to a less concentrated area, through a semi- permeable membrane. Without diffusion, the cells in your body will not be able to obtain the resources they need to survive, like water and proteins.

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Seed leaves are called _____.
cotyledons
endosperm
sepals
tendrils

Answers

Answer:

The correct answer would be cotyledons.

The cotyledons or seeds-leaf are defined as the primary leaf present in the embryo within the seeds of the higher plant.

After germination, the cotyledons may become the first leaves of the seedling.

The species of plants which possess one cotyledon are termed as monocotyledons whereas the species which possess two cotyledons are termed as dicotyledons.

Seed leaves, or cotyledons, are the first leaves to appear from a germinating seed and provide nutrients to the developing plant. Therefore, the correct answer is option a.

Cotyledons are the first embryonic leaves or leaf-like structures that appear in the seeds of flowering plants (angiosperms) as they germinate.
Cotyledons serve as nutrient storage structures and provide initial nourishment to the growing seedling until it can establish its own photosynthesis. They can be found inside the seed.
The number of cotyledons varies among plant species and is a key characteristic used in plant classification. Plants with one cotyledon are called monocots, and those with two cotyledons are called dicots.

The other options mentioned are different parts or structures of a plant:

Endosperm is a tissue within the seed that provides nutrients to the developing embryo.
Sepals are leaf-like structures that protect the developing flower bud.
Tendrils are specialized structures used by some plants for support or attachment to other surfaces, such as for climbing.

Therefore, the correct answer is option a.

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A man goes swimming in a pond. As he swims, which reaction provides energy to power his muscles?ATP regenerates from ADP using energy in glucose.
The ADP molecule adds a phosphate group and produces ATP.
ATP loses one phosphate group and converts to ADP.
NextReset

Answers

The answer is ATP loses one phosphate group and converts to ADP.

ATP stores potential energy in the form of chemical bond. By breaking this bond and removing one phosphate group from ATP, which is then converted to ADP, great amount of energy is released and it is ready to be used.

"An animal's behavior is based on learning."This statement would most likely come from a(n) _____.
ethologist
comparative behaviorist

Answers

This statement would most likely come from a comparative behaviorist. Behaviorists study the behavior of both humans and animals. If somebody said this statement, it would mean that they observed this animal's behavior over a long period of time to determine that it learned how to do something, and that it's not just a result of instinct. If it were instinct, an ethologist would study that.

Your answer is B comparative Behaviorist

What are two methods of active transport ?

Answers

The first one is that transport proteins in the cell membrane ' Pick up ' molecules from outsides the cell and carry them in , while using energy in the process

The second method is that the the cell membrane surrounds a particle and takes it in

I hope that's help !

Histamine is a chemical substance released in inflammatory and allergic responses. The histamine H1 receptor on target cells is a G protein-coupled receptor that activates phospholipase C in response to the binding of histamine. Which statements are true about the binding of histamine to the histamine H1 receptor? Select all that apply. Histamine diffuses across the plasma membrane to bind to the H1 receptor. Histamine binds extracellularly to the H1 receptor. When histamine binds to the H1 receptor, the receptor undergoes a conformation change and binds the inactive G protein. Histamine binds intracellularly to the inactive G protein, activating the G protein. Once the G protein is active, it binds to the enzyme phospholipase C, activating it. Histamine is likely hydrophilic.

Answers

The statements 'histamine binds extracellularly to the H1 receptor', 'when histamine binds to the H1 receptor, the receptor undergoes a conformation change and binds the inactive G protein', 'once the G protein is active, it binds to the enzyme phospholipase C, activating it', and 'histamine is likely hydrophilic' are TRUE.

Histamine is a molecule released during inflammatory and allergic responses.

This molecule (histamine) binds to the G-protein coupled histamine (H1) receptor. This binding triggers a conformational change in the three-dimensional (3D) shape of the G-protein coupled H1 receptor.

Subsequently, the heterodimeric G protein is activated by GTP binding. The G-protein–GTP complex then dissociates from the G-protein coupled H1 receptor and interacts with phospholipase C, thereby activating a transduction signaling pathway.

Finally, the G protein accelerates the hydrolysis of GTP to GDP and thus terminates the transduced signal.

In conclusion, the statements 'histamine binds extracellularly to the H1 receptor', 'when histamine binds to the H1 receptor, the receptor undergoes a conformation change and binds the inactive G protein', 'once the G protein is active, it binds to the enzyme phospholipase C, activating it', and 'histamine is likely hydrophilic' are TRUE.

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Answer:

-Histamine binds extracellularly to the H1 receptor.

-When histamine binds to the H1 receptor. the receptor undergoes a conformation change and binds the inactive G protein.

-Once the G protein is active, it binds to the enzyme phospholipase C, activating it.

-Histamine is likely hydrophilic.

When histamine encounters a target cell, it binds extracellularly to the H1 receptor, causing a change in the shape of the receptor. This change in shape allows the G protein to bind to the H1 receptor, causing a GTP molecule to displace a GDP molecule and activating the G protein. The active G protein dissociates from the H1 receptor and binds to the enzyme phospholipase C, activating it. The active phospholipase C triggers a cellular response. The G protein then functions as a GTPase and hydrolyzes the GTP to GDP. The G protein dissociates from the enzyme and is inactive again and ready for reuse.

Explanation:

What type of molecule stores the main source of energy use by animals?

Answers

the answer is glycogen

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