Cell Membrane and Cell Transport

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, providing protection and support.

Front

Define diffusion.

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is osmosis?

Back

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

Front

What does it mean for a solution to be isotonic?

Back

An isotonic solution has equal concentrations of solute on both sides of a membrane, resulting in no net movement of water.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a membrane with the help of proteins, without using energy.

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy (ATP).

Front

What role do proteins play in the cell membrane?

Back

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

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from the outside environment, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is the process of vesicles fusing with the cell membrane to release their contents outside the cell.

Front

Define concentration gradient.

Back

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