Homeostasis - Cell Transport

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

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What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can be passive (without energy) or active (requiring energy).

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP).

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What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What role does the cell membrane play in homeostasis?

Back

The cell membrane regulates what enters and exits the cell, helping to maintain a stable internal environment.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

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What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

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What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink or crenate.

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What happens to a cell in a hypotonic solution?

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In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst (lyse).

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What is isotonic solution?

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An isotonic solution has the same concentration of solutes as the cell, resulting in no net movement of water.