The parasympathetic neurons of the autonomic nervous system decrease the rate at which the pacemaker cells of the sinoatrial node drive the heart rate by secreting the neurotransmitter ________.
Fill in the blank(s) with the appropriate word(s).
acetylcholine
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The proximal convoluted tubule cells are
A) cuboidal cells with microvilli. B) cuboidal cells without microvilli. C) squamous cells. D) columnar cells with microvilli. E) columnar cell without microvilli.
A condition in which the heart is contracting in an uncontrolled, rapid, and irregular manner
a. is heart block b. is fibrillation c. can be treated with administration of an electrical current d. is none of the above e. is both b and c
Which of the following is an example of water conservation by the body?
A. Decreased water intake B. Decreased urine volume C. Increased urine volume D. Perspiration E. Diarrhea
The common name for the sternum is the ________.
A. zygomatic bone B. breastbone C. finger bones D. shinbone E. kneecap