Molecules that bind to a cell's receptor and trigger a response by that cell are called:
A. steroids.
B. agonists.
C. hormones.
D. antagonists.
Ans: B. agonists.
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What is the relationship between ions and myelin that prevents ions from passing through channels?
A) Size: Ions are large in diameter and myelin is much smaller. B) Electrical: Ions have negative charges and myelin have positive charges. C) Solubility: Ions are water soluble and myelin is a lipid. D) Weight: Ions are light and myelin is much heavier.
Two patients are brought to the emergency room. One has cut his finger with a knife; the other has stepped on a nail. Which wound has a greater chance of becoming infected? Why?
What will be an ideal response?
Hydrolysis of glycogen will have what effect on blood glucose level?
A. No effect on blood glucose level B. Increase blood glucose level C. Decrease blood glucose level
Which of the following is NOT a result of the LH surge that occurs in the middle of the menstrual cycle?
A. The primary oocyte completes its first meiotic division. B. Antrum size (fluid volume) and blood flow to the follicle increase markedly. C. The granulosa cells begin releasing progesterone and decrease their release of estrogen. D. Enzyme and prostaglandin synthesis by the granulosa cells increases, breaking down the follicular membranes. E. The corpus luteum stops secreting hormones and degenerates.