Cellular Transport and Osmosis--TEST--biology

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy (ATP).

Front

What is homeostasis?

Back

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

Front

What is the main function of the plasma membrane?

Back

The plasma membrane regulates the movement of substances in and out of the cell, maintaining the cell's internal environment.

Front

What happens to cells in an isotonic solution?

Back

In an isotonic solution, there is no net movement of water into or out of the cells, maintaining their shape.

Front

What are two types of passive transport?

Back

The two types of passive transport are osmosis and diffusion.

Front

Define 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.

Front

What is diffusion?

Back

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

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules or ions to pass through while blocking others, maintaining the cell's 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.

Front

What is the role of ATP in active transport?

Back

ATP provides the energy required for active transport to move substances against their concentration gradient.