Homework Review Flashcard 1: Cell Membrane and Transport

Front

What regulates what enters and leaves a cell?

Back

Cell Membrane

Front

What is the function of the cell membrane?

Back

Regulates what enters and leaves the cell.

Front

What does hydrophobic mean?

Back

Water fearing.

Front

What does it mean for the cell membrane to be semi-permeable?

Back

It allows some materials (not all) to pass through.

Front

What does hydrophilic mean?

Back

Water loving.

Front

What are the main components of the cell membrane?

Back

Phospholipids, proteins, cholesterol, and carbohydrates.

Front

What is the role of phospholipids in the cell membrane?

Back

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

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.

Front

What is osmosis?

Back

The diffusion of water across a semi-permeable membrane.

Front

What is the function of membrane proteins?

Back

They assist in transport, act as receptors, and provide structural support.