chp 7 s4

Question 1

endocytosis

Answer 1

surrounds and brings particles into the cell

Question 2

exocytosis

Answer 2

takes cell materials out of the cell

Question 3

what is a sodium-potassium pump?

Answer 3

a pump that moves 3 positive sodium ions out of the cell and moves 2 positive potassium ions into the cell

Question 4

osmosis

Answer 4

diffusion of water across a membrane

Question 5

what is the sodium-potassium pump an example of?

Answer 5

active transport

Question 6

what is active transport?

Answer 6

the movement of particles across the cell membrane using energy

Question 7

what is the isotonic solution?

Answer 7

WATER and solutes have equal concentration and diffuse INTO AND OUT OF the cell

Question 8

what is the hypertonic solution?

Answer 8

• solute concentration is higher OUTSIDE of the cell

- water diffuses OUT OF the cell

Question 9

what is the hypotonic solution?

Answer 9

• solute concentration is higher INSIDE of the cell

- water diffuses INTO the cell

Question 10

what is osmosis?

Answer 10

diffusion of WATER across a selectively permeable membrane

Question 11

what is facilitated diffusion?

Answer 11

movement of materials across the plasma membrane using proteins

Question 12

what is dynamic equilibrium?

Answer 12

when particles are evenly distributed so there is no change to inside or outside of the cell

Question 13

when is dynamic equilibrium reached?

Answer 13

Is reached when diffusion of material into the cell equals diffusion of material out of the cell

Question 14

what is diffusion?

Answer 14

Movement of particles across the membrane without using energy

Question 15

example of diffusion?

Answer 15

tea bag steeping in water

Question 16

example of facilitated diffusion?

Answer 16

movement of glucose into cell to make ATP

Question 17

example of dynamic equilibrium?

Answer 17

when cold and hot air enter a room at the same time so there’s no change in temp