AP Bio Insta-Review Topic 2.5*: Membrane Permeability

Front

What is membrane permeability?

Back

Membrane permeability refers to the ability of a membrane to allow substances to pass through it. It is influenced by the membrane's structure and the properties of the substances.

Front

What type of membrane protein allows water passage?

Back

Channel protein.

Front

Which organisms do NOT have a cell wall?

Back

Protists.

Front

What is the easiest molecule to pass through a cell membrane?

Back

Carbon dioxide.

Front

What makes up the cell wall of some prokaryotes?

Back

Peptidoglycan.

Front

Which molecule passes through the membrane easily? A. Ca²⁺ B. CO₂ C. Glucose D. H₂O

Back

B. CO₂.

Front

What is the role of carrier proteins in membranes?

Back

Carrier proteins facilitate the transport of specific substances across a membrane by changing shape.

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 osmosis?

Back

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

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the fluidity of the cell membrane.