What type of membrane proteins can catalyze chemical reactions on the inner or outer surfaces of the plasma membrane?
A. channel protein
B. carrier proteins
C. receptor proteins
D. enzymes
E. marker molecules
D
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Which a layer of hyaline cartilage reduces friction between bones involved in a joint?
a) periosteum b) distal epiphysis c) nutrient foramen d) articular cartilage e) epiphyseal plate
The part of the stomach that joins with the small intestine is the:
a. pylorus b. fundus c. body d. rugae
In the thick segment of the ascending limb of the nephron loop, K+ reenters the cell from the interstitial fluid via the ________. K+ is then secreted into the tubular fluid.
A. juxtaglomerular apparatus B. countercurrent exchange C. Na+-K+ pump D. countercurrent multiplier E. vasa recta
Trypsin can activate
A. pepsinogen. B. chymotrypsinogen. C. angiotensinogen. D. endopeptidase. E. lipase.