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Physiology 2002 > Pumps and Epithelia > Flashcards

Flashcards in Pumps and Epithelia Deck (10):
1

Na/K ATPase pumps __ in and ___ out.

K in
Na out

2

Constant pumping by the Na/K ATPase counters _____________________________________. It is required to keep ___________________________.

The leakage of ions across the cell membrane
Normal electrolyte concentrations

3

Na/K ATPase action keeps ionic gradients _______. This maintains _______________.

Constant
Resting membrane potential

4

Na+ is ____ to/from it's equilibrium potential in cells

Far from

5

K+ is ____ to/from it's equilibrium potential in cells

Far from

6

Cl- is ____ to/from it's equilibrium potential in cells

Close to

7

What does paracellular mean?

Transport between cells

8

What does transcellular mean?

Transport through cells

9

Paracellular transport is limited by _______________.

Tight junctions

10

What are tight junctions?

Joints between adjacent cell membranes, they are joint together at "kiss" sites by membrane proteins