Chap 3B Unit 5

Question 1

Active Transport

Answer 1

the movement of chemical substances usually across the cell membrane, against a concentration gradient; requires energy

Question 2

ATP

Answer 2

adenosine triphosphate, an organics molecule that acts as the main energy source for the cell process

Question 3

Sodium-Potassium Pump

Answer 3

a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the cell

Question 4

Proton Pump

Answer 4

another transport protein, uses energy from the
breakdown of ATP to move hydrogen ions (or protons) out of the cell

Question 5

Endocytosis

Answer 5

the process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell

Question 6

```Phagocytosis

Answer 6

uptake of a solid particle into a cell by engulfing the particle

Question 7

Exocytosis

Answer 7

the process by which a substance is released from the cell through a vesicle that transports the substance to the cell surface and than fuses with the membrane to let the substance out