Once inside the cells of the ascending limb, potassium and chloride cross the basal membrane into the interstitial fluid by the process of
A. facilitated diffusion.
B. cotransport.
C. counter transport.
D. active transport.
E. simple diffusion.
A
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Atropine is sometimes used to dilate the pupil for an eye examination. Which receptor would atropine block?
A. Alpha 1 adrenergic receptor B. Nicotinic receptor C. Muscarinic receptor D. Alpha 2 adrenergic receptor E. Beta receptor
If adenylyl cyclase (the enzyme that converts ATP to cAMP) is blocked,
A) the activity of progesterone at the endometrium would increase. B) the mammary glands would not respond to progesterone. C) endometrial cells would not respond to estradiol. D) the level of progesterone produced by the ovary during the luteal phase would increase. E) the corpus luteum would not respond to hCG.
Intrinsic factor is secreted by which cells of the gastric glands?
A) mucous cells B) chief cells C) peptic cells D) parietal cells
Which organ functions to absorb significant quantities of water, electrolytes, and vitamins?
A) large intestine B) spleen C) pancreas D) stomach