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kap26 [50]
2 years ago
10

Please help.

Biology
1 answer:
Leya [2.2K]2 years ago
6 0

Answer:

The endocrine hormones help control mood, growth and development, the way our organs work, metabolism , and reproduction. The endocrine system regulates how much of each hormone is released.

Explanation:

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You would most likely find fish, such as rainbow trout, in the limnetic zone.
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Most human cells range from 10 to 15 micrometers in diameter. What limits how large a cell can get
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The relationship between its volume and surface area limits how large a cell can get.

<h3>What is cell range?</h3>

The range of a cell is defined as the quantity of material that can be found within a cell with respect to the surface area.

The range of a cell is limited by the volume and the surface area which means that the wider the surface area the more volume the cell can contain.

Learn more about cell here:

brainly.com/question/13920046

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3 0
2 years ago
In which case would facilitated diffusion be needed?
melomori [17]

Answer:

The voltage-gated potassium channels associated with an action potential provide an example of what type of membrane transport?

A. Simple diffusion.

B.<u> Facilitated diffusion. </u>

C. Coupled transport.

D. Active transport.

You are studying the entry of a small molecule into red blood cells. You determine the rate of movement across the membrane under a variety of conditions and make the following observations:

i. The molecules can move across the membrane in either direction.

ii. The molecules always move down their concentration gradient.

iii. No energy source is required for the molecules to move across the membrane.

iv. As the difference in concentration across the membrane increases, the rate of transport reaches a maximum.

The mechanism used to get this molecule across the membrane is most likely:

A. simple diffusion.

<u>B. facilitated diffusion. </u>

C. active transport.

D. There is not enough information to determine a mechanism.

Carrier proteins - exist in two conformations, altered by high affinity binding of the transported molecule. Moves material in either direction, down concentration gradient (facilitated diffusion). EXAMPLE: GluT1 erythrocyte glucose transporter.

Channel proteins - primarily for ion transport. Form an aqueous pore through the lipid bilayer. May be gated. Moves material in either direction, down concentration gradient (facilitated diffusion). EXAMPLES: Voltage-gated sodium channel, erytrhocyte bicarbonate exchange protein.

This might be helpful... because I don't know anything about facilitated diffusion.

5 0
3 years ago
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