Chap 3B Unit 4

Question 1

Passive Transport

Answer 1

The movement of molecules across a cell membrane without energy input from the cell.

Question 2

Diffusion

Answer 2

The movement of molecules in a fluid or gas from a region of higher concentration to a region of lower concentration.

Question 3

Concentration Gradient

Answer 3

The difference in the concentration of a substance from one location to another.

Question 4

Osmosis

Answer 4

They move across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration.

Question 5

Isotonic Solution

Answer 5

An isotonic solution has a solute concentration equal to the solute concentration inside a cell.

Question 6

Hypertonic Solution

Answer 6

A hypertonic solution has a solute concentration higher than the solute concentration inside
a cell.

Question 7

Hypotonic Solution

Answer 7

A hypotonic solution has a solute concentration lower than the solute concentration inside a cell.​

Question 8

Facilitated Diffusion

Answer 8

The diffusion of molecules across a membrane through transport proteins.