Which of the following does a person not maintain through homeostasis?
a. Concentration of nutrients in the blood
b. Concentration of oxygen around the body
c. Blood pressure
d. Temperature of the brain
e. Posture while sitting in a chair
B
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Which of the following describes tubular reabsorption in the kidney?
A. Transepithelial transport from the lumen of the tubule into renal interstitial fluid B. Transport of solutes from the renal medullary interstitial fluid into the collecting duct C. The movement of substances from the peritubular capillaries into the tubular fluid D. The movement of substances from the proximal tubule into the loop of Henle E. Movement of Na+, Cl-, and water from glomerular capillaries into Bowman's capsule
Which cells fight infection by producing antibodies?
A. T cells B. Natural killer cells C. B cells D. Eosinophils E. Macrophages
The Pancreatic polypeptide cells (PP cells) of the pancreatic islets produce
A) insulin. B) glucagon. C) pancreatic polypeptide. D) cortisol. E) GH-IH.
Incomplete tetanus
A. is the time during which the tissue cannot respond again. B. results in complete and incomplete tetanus. C. is the condition in which the muscle fiber only partially relaxes between contractions. D. is the condition in which stimuli occur so rapidly that there are no intervening relaxations. E. is the constant tension produced by muscles for long periods of time.