Lecture 18

Question 1

What type of gradient do cells have

Answer 1

electrochemical gradient

Question 2

what is an electrochemical gradient

Answer 2

distribution of charged molecules; proteins inside cell is negative, environment or outside is positive

Question 3

membrane potential allows what

Answer 3

control of flow of ions in or out

Question 4

electrochemical gradient affects what

Answer 4

membrane potential

Question 5

Simple diffusion happens at what speed

Answer 5

linear, constant

Question 6

Facilitated diffusion happens at what speed

Answer 6

hyperolic, fast then slows down

Question 7

what is facilitated diffusion

Answer 7

diffusion along gradient but with help of transport proteins

Question 8

transport proteins may have what

Answer 8

competition

Question 9

how may cells compete for transport proteins

Answer 9

inhibition

Question 10

how do therapeutic drugs work

Answer 10

inhibition of transport proteins

Question 11

how do gasses go through the membrane

Answer 11

simple diffusion of O2, CO2, H2O

Question 12

Example of facilitated diffusion (glucose)

Answer 12

Transport protein of GLUT1 that transports glucose into RBC where the concentration is lower

Question 13

Types of transport proteins

Answer 13

uniport, symport, antiport

Question 14

water regulation occurs in what way

Answer 14

osmosis/ simple diffusion

Question 15

aquaporin channels are used for

Answer 15

facilitating high flow of water in/out (kidney cells)