UNIT 05 Cellular Transport and Homeostasis Assessment

Front

What is active transport?

Back

Active transport is the process of moving particles across the plasma membrane against their concentration gradient, requiring energy (ATP).

Front

What is passive transport?

Back

Passive transport is the movement of particles across the plasma membrane without the use of energy, occurring along the concentration gradient.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of particles from an area of higher concentration to an area of lower concentration.

Front

What is 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 dynamic equilibrium?

Back

Dynamic equilibrium is a state in which the concentrations of substances remain constant over time, even though particles continue to move across the membrane.

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.

Front

What is the role of sodium in maintaining homeostasis?

Back

Sodium helps regulate fluid balance, blood pressure, and nerve function in the body.

Front

What is the significance of the plasma membrane?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the plasma membrane.