A drug that interferes with the active transport of calcium ions from the sarcoplasm back into the sarcoplasmic reticulum would result in
A. relaxation of the muscle fiber.
B. contraction with no relaxation.
C. muscle hypertrophy.
D. fibrosis of the muscle.
E. an imbalance of blood calcium.
B
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Which statement regarding the ribs is not true?
A. There is one rib attached to each side of the twelve thoracic vertebrae. B. The first seven pairs of ribs are true ribs. C. The last 5 pairs of ribs are false ribs. D. The heads of the ribs articulate with the bodies of the vertebrae and the tubercles articulate with the transverse processes. E. All of the above statements are true.
Which of the following components of the bone matrix is inorganic?
A. Hydroxyapatite B. Collagen C. Glycosaminoglycan D. Glycoprotein E. Proteoglycan
Tom is a 45-year-old male that has lost his ability to hear high frequency sounds. The most likely explanation for this would be ________
A) damage to the hair cells near the oval window in the cochlear duct B) middle ear infection C) an overgrowth of bony tissue, fusing the ossicles together D) a perforated tympanic membrane
The cells that produce testosterone in the testis are called ________
A) spermatogonia B) sustentacular cells C) interstitial endocrine cells D) spermatocytes