Which of the following decreases the rate of depolarization in the heart?
A) norepinephrine
B) acetylcholine
C) epinephrine
D) epinephrine and norepinephrine
E) acetylcholine, epinephrine and norepinephrine
Ans: B) acetylcholine
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Fill in the blank with correct words.
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A) antidiuretic hormone. B) thyroid-stimulating hormone. C) growth hormone. D) adrenocorticotropic hormone.
What type of hormone is made from cholesterol?
A) steroid hormone B) amine hormone C) protein hormone D) peptide hormone
The lead arrangement known as Einthoven's triangle, which is used to record an ECG, involves placing recording electrodes on
A. both wrists and the left ankle. B. the left and right shoulders and the navel. C. both wrists and the right ankle. D. both ankles and the right wrist. E. both ankles and the left wrist.