Digestive Systems Terms

Question 1

Define Diffusion.

Answer 1

Movement of molecules/solutes from an area of high to low concentration.

Question 2

Define Osmosis.

Answer 2

Diffusion of water across a selectively permeable membrane.

Question 3

Define Facilitated diffusion.

Answer 3

Molecules combine with a carrier protein and are carried across a membrane from high to low concentrations.

Question 4

Define Active Transport.

Answer 4

Molecules are pumped across using energy and go from a low to high concentration.

Question 5

Define Endocytosis.

Answer 5

The plasma membrane wraps around the molecule and pinches off allowing the molecule to exit the tract.