QUESTION 1

How many subunits does the sodium potassium ATPase pump have ? M
a.1
b.2
c.3
d.4

QUESTION 2
When the sodium potassium ATPase pump is turned on, how many sodiums are pumped out of the cell? 

a.1

b.2

c.3

d.4
 
QUESTION 3

The sodium potassium ATPase pump pumps how many potassiums into the cell?

a.1

b.2

c.3

d.4

QUESTION 4

WHICH OF THE FOLLOWING HORMONES IS KNOWN TO INCREASE THE ACTIVITY OF THE SODIUM POTASSIUM ATPASE PUMP? 

a.CORTISOL

b.ALDOSTERONE 

c.ESTROGEN

d.PTH 

QUESTION 5

WHICH OF THE FOLLOWING DRUGS INHIBITS THE SODIUM POTASSIUM ATPASE PUMP? 

a.DIGOXIN

b.HYDROCORTISONE

c.METFORMIN 

d.NONE OF THE ABOVE 

QUESTION 6

DIGOXIN IS A 
a.POSITIVE IONOTROPIC AGENT 

b.NEGATIVE INOTROPIC AGENT 

c.A POSITIVE CHRONOTROPIC AGENT 

d.NONE OF THE ABOVE 

QUESTION 7

THE SODIUM/POTASSIUM PUMP CONTAINS BUILT IN 

a.GTPase ACTIVITY

b.ATPase activity 

c.protein kinase activity

d.none of the above 

10 points 
QUESTION 8

Phosphorylation of the pump leads to which of the following? 

a.increased affinity for sodium 

b.decreased affinity for sodium 

c.increased affinity for potassium 

d.none of the above 

QUESTION 9

DEPHOSPHORYLATION OF THE PUMP 

a.RESULTS IN A CONFORMATIONAL CHANGE THAT DELIVERS POTASSSIUM OUT INTO THE ECF 

b.RESULTS IN A CONFORMATIONAL CHANGE THAT DELIVERS POTASSSIUM INTO THE ICF 

c.RESULTS IN A CONFORMATIONAL CHANGE THAT DELIVERS POTASSSIUM OUT OF THE CELL 

dNONE OF THE ABOVE 

QUESTION 10

INCREASING THE ACTIVITY OF THE SODIUM POTASSIUM ATPASE CAN POTENTIALLY HAVE WHAT EFFECT ON THE MEMBRANE POTENTIAL? 

a.HYPERPOLARIZATION 

b.DEPOLARIZATION 

c.SIGNIFICANT DEPOLARIZATION 

d.NONE OF THE ABOVE 

QUESTION 11

WHEN A CELL IS EXPOSED TO LOW OXYGEN, THE ACTIVITY OF THE SODIUM /POTASSIUM ATPASE PUMP

a.INCREASES

b.DECREASES 

c.INITIALLY INCREASES , FOLLOWED BY A DECREASE. 

d.NONE OF THE ABOVE