Movement Across Boundaries

Question 1

Osmosis and diffusion are ______ processes

Answer 1

Random molecular motion

Question 2

Integral proteins are _______ mechanism

Answer 2

Transport

Question 3

Large things pass through the membrane through ____

Answer 3

Endocytosis

Question 4

T or F. Diffusion is random consequence of temperature.

Answer 4

True

Question 5

What is the rule of diffusion?

Answer 5

Substance moves from areas of high free energy to low free energy until it reaches equilibrium

Question 6

What is osmosis?

Answer 6

The diffusion of water

Question 7

What are types of movement across membranes?

Answer 7

Passive and active

Question 8

What is passive transport?

Answer 8

Diffusion by random molecular motion

Question 9

Define: active transport

Answer 9

Transport through the cell using energy

Question 10

T or F. Active transport can move from low free energy to high free energy

Answer 10

True.

Question 11

What are the 3 ways that things can enter the cell?

Answer 11

Through random molecular motion, transport mechanisms and endocytosis

Question 12

What are the three types of ports?

Answer 12

Antiport, symport and uniport

Question 13

How many molecules go through the uniport?

Answer 13

One

Question 14

What happens in a symport?

Answer 14

It takes two molecules going in the same direction

Question 15

What happens in an antiport?

Answer 15

Two molecules go through in different directions

Question 16

What is an example of an antiport, a uniport and a symport

Answer 16

Antiport: sodium potassium pump
Uniport: calcium pump
Symport: proton pump

Question 17

Describe the method of the potassium pump.

Answer 17

1. 2 potassium ions bing at site causing phosphate to fall off
2. ATP binds at site 5
3. 3 sodium ions bind at site 1
4. ATP donates a phosphate group to site 4, turning to ADP
5. 3 sodium ions leave the cell
6. Opens channel so 2 potassium pumps can bind and repeat.

Question 18

Define: phosphorylation

Answer 18

When a phosphate is added to a molecule

Question 19

When a phosphate is removed, it is called ____

Answer 19

Elephosphorylation

Question 20

Kinase _____ phosphate whereas phosphatase _______ phosphate.

Answer 20

Adds, removes

Question 21

One way of inhibiting the sodium potassium pump is by ________

Answer 21

Cardiac glycosides bing to site 3 and kill the pump

Question 22

Outside the cell there is ____ sodium and inside the cell there is _____ potassium

Answer 22

Higher, higher