question 17.) What twofactors determine the pressure in any …
question 17.) What two factors determine the pressure in any blood vessel ?
a.the amount of blood in the blood vessel and its function
b.the size of the blood vessel and the amount of blood in the blood vessel
c.the size of the blood vessels and its location
d.none of the above
3 points
QUESTION 18
Which of the following conditions at the S-A node will cause a decrease in heart rate?
Increased sodium permeability
Decreased acetylcholine levels
Increased norepinephrine levels
Increased potassium permeability
3 points
QUESTION 19
What effect does atropine have on heart rate.
a.decrease
b.increase
c.both
d.none of the above
3 points
QUESTION 20
Which of the following conditions at the S-A node will cause a decrease in heart rate?
Increased sodium permeability
Decreased acetylcholine levels
Increased norepinephrine levels
Increased potassium permeability
QUESTION 21
Which of the following junctiomal proteins are located between cardiomyocytes?
a.tight junctions
b.gap junctions
c.desmosomes
d.hemidesmosomes
e.none of the above
