6.4 PEx: Cardiovascular Physiology Lab Part 1

Part A

Which of the following affect heart rate through the use of a cAMP (second messenger) system?
    epinephrine
    acetylcholine
    norepinephrine
    acetylcholine, epinephrine and norepinephrine
    epinephrine and norepinephrine

Part B

Which of the following decreases the rate of depolarization in the heart?
    acetylcholine
    epinephrine and norepinephrine
    norepinephrine
    acetylcholine, epinephrine and norepinephrine
    epinephrine

Part C

The sinoatrial node has receptors for _______.
    epinephrine and norepinephrine
    acetylcholine
    acetylcholine, epinephrine and norepinephrine
    epinephrine
    norepinephrine

Part D

An adrenergic drug that worked in opposition to epinephrine would _______.
    decrease heart rate
    be an agonist and increase heart rate
    be an antagonist and decrease heart rate
    increase heart rate