Chapter 3

Question 1

collagen

Answer 1

forms flexible, nonelastic fibers or sheets that provide tensile strength

Question 2

elastin

Answer 2

allows tissues to stretch and recoil

Question 3

fibronectin

Answer 3

promotes cell adhesion and holds cells into position

Question 4

What increases the net rate of diffusion?

Answer 4

• increased of concentration of the gradient substances
• increased surface area of the membrane
  -increased lipid solubility

Question 5

What decreases the net rate of diffusion?

Answer 5

-increased in molecular weight
-increased distance between alveoli and blood

Question 6

facilitated diffusion

Answer 6

requires carrier protein; carries down concentration gradient; protein

Question 7

What is the typical resting membrane poteintial?

Answer 7

-70 MV

Question 8

The resting membrane is more permeable to ?

Answer 8

K

Question 9

Does Calcium go inside the cell?

Answer 9

Yes; because the cell is negative and the Ca+ is positive

Question 10

Does Cl- go inside the cell?

Answer 10

Yes; because the gradient of concentration is stronger than electrical

Question 11

Depolarizing

Answer 11

membrane potential becomes more positive

Question 12

hyperpolorization

Answer 12

membrane potential becomes more negative

Question 13

what is the resting potential for K+?

Answer 13

-90 MV

Question 14

what is the resting potential for Na+?

Answer 14

+60 MV

Question 15

The Na+/K+ pumps how many Na+ for how many 2 K+

Answer 15

Transports 3 Na+ out for every 2 K+ pumped in

Question 16

Hyperkalemia

Answer 16

too much K+ outside the cell; -60 MV

Question 17

hypokalemia

Answer 17

too less K+ outside the cell; -80 MV