AP Biology Unit 2 Cell Structure & Function

Front

What happens to a cell when water moves into it?

Back

The cell will swell.

Front

What is the term for the diffusion of water through a cell membrane along its concentration gradient?

Back

Osmosis.

Front

What does the term 'fluid mosaic' refer to in cell biology?

Back

It describes the cell membrane's structure, which is composed of many small parts that move together as a system.

Front

What theory explains the origin of membrane-bound organelles in eukaryotic cells?

Back

The endosymbiotic theory.

Front

Where is the initial concentration of water greatest in relation to a cell when it is in a hypotonic solution?

Back

Outside of the cell.

Front

What is the primary function of the cell membrane?

Back

To regulate the movement of substances in and out of the cell.

Front

What is the role of phospholipids in the cell membrane?

Back

They form a bilayer that provides a barrier to most water-soluble substances.

Front

What is the significance of membrane proteins?

Back

They assist in transport, act as enzymes, and serve as receptors for signaling.

Front

How does a hypertonic solution affect a cell?

Back

Water moves out of the cell, causing it to shrink.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move substances against their concentration gradient.