Homeostasis & Transport - Module A

Front

What is diffusion?

Back

Diffusion is the process by which substances move from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

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.

Front

What does selectively permeable mean?

Back

A membrane is selectively permeable when it allows some molecules to pass through while blocking others.

Front

What role do proteins play in the phospholipid bilayer?

Back

Proteins form channels and pumps that help transport substances across the cell membrane.

Front

What is the main difference between passive and active transport?

Back

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

Front

What happens to a cell in a hypertonic solution?

Back

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

Front

What happens to a cell in a hypotonic solution?

Back

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

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.

Front

What is concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.