Atrial natriuretic peptide is a hormone that is made in the atria of the heart. The influence of this hormone is to ________.
A) enhance atrial contractions
B) activate the renin-angiotensin mechanism
C) prevent pH changes caused by organic acid
D) reduce blood pressure and blood volume by inhibiting sodium and water retention
D) reduce blood pressure and blood volume by inhibiting sodium and water retention
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A chemical from outside a cell that promotes cell division is called a
A) nutrient. B) promoter. C) mutagen. D) telomere. E) growth factor.
Located on either side of the urethra in the male reproductive system, the ________________________________________ glands secrete a thick mucus that lubricates sperm
Fill in the blank(s) with correct word
Which of the following is NOT a function of synovial fluid?
A) provide nutrients to cells in the joint cavity B) shock absorption during movement C) protect tendons D) lubrication of the joint cavity
Contraction of cardiac muscle typically requires:
A. Ca++ influx through voltage-gated Ca++ channels to trigger a rise in cytosolic [Ca++] B. Ca++ influx through voltage-gated Ca++ channels, which is sufficient to support contraction C. activation of MLCK D. phosphorylation of myosin heavy chain E. Ca++ influx through the Na+-Ca++ antiporter