Of the following clinical conditions affecting skeletal muscle, which is caused by a virus?
A) tetanus
B) botulism
C) Duchenne muscular dystrophy
D) polio
E) rigor mortis
Answer: D
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The number of spermatids that come from one primary spermatocyte is
a. 1 b. 2 c. 4 d. 8
When myosin cross-bridges bind to the active sites on actin,
A) ATP is hydrolyzed. B) They pivot toward the M line. C) The sarcomere strengthens. D) Muscle relaxation occurs. E) The I band moves closer to the Z line.
The golf-ball sized structure found inferior to the urinary bladder, and surrounding the most proximal portion of the urethra, is called the ________.
A. urethra B. prostate C. seminal vesicle D. bulbourethral gland E. ejaculatory duct
What term means the fibrous supporting network formed of reticular fibers?
A) lobule B) septum C) adipose D) stroma E) ground substance