Test - Cell Transport

Front

What does selectively-permeable mean?

Back

It means that the cell membrane allows certain substances to enter and leave the cell while restricting others.

Front

Which way do water molecules move during osmosis?

Back

Water molecules move out of the cell, causing the cell to shrink.

Front

What is the process called when the cell membrane surrounds a particle and encloses it for large particles?

Back

Endocytosis.

Front

What does passive transport require?

Back

Passive transport requires no energy.

Front

What is active transport?

Back

Active transport is the process where cells use energy to move materials across a membrane from low to high concentration.

Front

Define osmosis in the context of cell transport.

Back

Osmosis is the movement 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 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 role do transport proteins play in cell membranes?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.

Front

What is the significance of the fluid mosaic model in understanding cell membranes?

Back

The fluid mosaic model describes the structure of cell membranes as a mosaic of various proteins that float in or on the fluid lipid bilayer, allowing for flexibility and movement.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, leading to cell shrinkage.