Cell Membrane Transport and Structure

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

Front

Define diffusion.

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane.

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 assist in transport, act as receptors, and provide structural support.

Front

Define active transport.

Back

Active transport is the movement of substances against their concentration gradient, requiring energy.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy.

Front

What are the three types of passive transport?

Back

The three types of passive transport are diffusion, facilitated diffusion, and osmosis.

Front

What is a concentration gradient?

Back

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

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a membrane.