Which of the following is NOT a function of the cell membrane?
A. Protein synthesis
B. Regulation of what moves into and out of the cell
C. Identifying the cell
D. Holding the cell together
Answer: A
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Seminalplasmin, an antibiotic that may help prevent urinary tract infections in males, is present in fluid secretions from the
A) seminal gland. B) prostate gland. C) bulbo-urethral glands. D) ductus deferens. E) seminiferous tubules.
Angiotensin II increases blood volume by stimulating
A. water movement into the cells. B. thirst. C. renal excretion of Na+. D. ADH production. E. vasodilatation.
A traumatic injury to the umbilical region could affect which segments of the small intestine?
A) only the duodenum would be affected B) only the jejunum would be affected C) only the ileum would be affected D) the duodenum and jejunum would be affected E) all three segments of the small intestine would be affected
Which is a TRUE statement about excitation-contraction coupling?
A. In skeletal muscle cells, it requires the influx of extracellular calcium ion. B. In smooth muscle cells, it must be preceded by an action potential in the cell membrane. C. In all kinds of muscle it requires the entry of calcium from the extracellular fluid. D. Calcium-induced calcium-release plays a role in cardiac muscle cells, as well as in some smooth muscle cells. E. In skeletal muscle cells, excitation-contraction coupling begins when an action potential propagates along the sarcoplasmic reticulum membrane.