Passive Transport Across Membranes

Question 1

Define transport

Answer 1

the movement of molecules from one side of a membrane to the other

Question 2

Define passive transport

Answer 2

-

Question 3

Concentration gradient

Answer 3

high to low

Question 4

Define diffusion

Answer 4

is movement of molecules from high concentration to low concentration

Question 5

Define facilitated diffusion

Answer 5

-

Question 6

The difference between carrier proteins and channel proteins

Answer 6

Channel: hydrophilic channel when open, Carrier: Bind specifically to molecules they assist

Question 7

Define gated ion channels

Answer 7

open or close in response to stimulus (chemical or electrical)

Question 8

Define osmosis

Answer 8

Water moves from “pure” to “less pure”

Question 9

Define hypertonic, hypotonic, and isotonic

Answer 9

hyper: high, hypo: low, iso: same solute concentration

Question 10

Cell responses to surroundings with different “tonicity”

Answer 10

-

Question 11

List three ways cells maintain osmotic balance

Answer 11

contractile vacuoles, adjust internal concentration, and circulate isotonic fluid