Cell Membrane and Cell Transport

Front

What is active transport?

Back

Active transport is the movement of materials across a cell membrane from low to high concentration, requiring energy.

Front

What happens to water in an isotonic solution?

Back

In an isotonic solution, water will flow both ways at equal rates.

Front

Which part of the phospholipid is hydrophobic?

Back

The tails of the phospholipid are hydrophobic.

Front

True or False: Regulating what enters and leaves the cell helps the cell maintain homeostasis.

Back

True.

Front

What is the primary function of the cell membrane?

Back

The primary function of the cell membrane is to regulate what enters and leaves the cell.

Front

Define diffusion.

Back

Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances from high to low concentration, while active transport requires energy to move substances from low to high concentration.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain substances to pass while blocking others.

Front

What is the role of proteins in the cell membrane?

Back

Proteins in the cell membrane help transport substances, act as receptors, and provide structural support.