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11 years ago
Exercise 6: Cardiovascular Physiology: Activity 4: Examining the Effects of Chemical Modifiers on Heart Rate Lab Report
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. The parasympathetic nervous system releases __________ to affect heart rate.
You correctly answered: d. acetylcholine
2. A cholinergic drug that worked the same as acetylcholine would
You correctly answered: c. be an agonist and decrease heart rate.
3. Norepinephrine affects the heart rate by
You correctly answered: a. increasing the rate of depolarization and increasing the frequency of action potentials.
4. The __________ receptor binds norepinephrine and epinephrine.
You correctly answered: b. ß-1 adrenergic


Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. Pilocarpine decreased the heart rate. Typical of cholinergic agonists, it
You correctly answered: b. decreased the frequency of action potentials.
2. The effect of atropine was to
You correctly answered: c. mimic the sympathetic nervous system.
3. The modifiers tested that decrease the heart rate were
You correctly answered: c. digitalis and pilocarpine.
4. To increase the heart rate, the best choices would be
You correctly answered: b. epinephrine and atropine.
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