Secondary spermatocytes divide to produce ________ spermatids, each having ________ chromosomes
A) millions of; 46
B) four; 23
C) one; 46
D) millions of; 23
E) four; 46
Answer: B
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As a result of the tympanic reflex,
A. the malleus is pulled toward the eardrum. B. the bridge of auditory ossicles becomes less rigid. C. vibrations are transmitted more effectively to the inner ear. D. vibrations are transmitted less effectively to the inner ear.
Close examination of a healthy organ reveals a lining of several layers of cells. The layers do not contain any blood vessels and one surface of the cells lines the cavity of the organ. This tissue is a type of
A) epithelium. B) muscle tissue. C) connective tissue. D) neural tissue. E) fat tissue.
The skin of a patient with end-stage renal disease:
A) is hot and dry. B) is thickened. C) may appear bruised. D) is usually flushed.
Which of the following acts to decrease blood glucose levels?
A. Glucagon B. Cortisol C. Insulin D. Growth hormone E. Epinephrine