What explains the dramatic acceleration in lengthwise bone growth at puberty?
A. Increased rate of calcium deposition occurs due to high blood calcium levels.
B. Increased physical activity causes lengthwise growth in response to bone stress.
C. Increased secretion of sex hormones promotes epiphyseal plate growth.
D. Increased activity of osteoclasts occurs in response to parathyroid hormone stimulation.
E. Increased absorption of dietary vitamins and minerals strengthens the matrix.
Answer: C
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The bones of the antebrachium are the
A. radius, ulna, and humerus. B. radius, ulna, humerus, and carpals. C. radius, ulna, carpals, and metacarpals. D. radius and ulna. E. carpals, metacarpals, and phalanges.
Which of the following pairs is mismatched?
A. Neural crest cells - peripheral nervous system, skin pigment, tissues of the face B. Ectoderm - skin C. Neuroectoderm - nervous system D. Endoderm - bone E. Mesoderm - muscle
What cell gives rise to all formed elements?
A) proerythroblast B) hematopoietic stem cell (HSC) C) reticulocyte D) erythroblast
Which of the following is NOT a short-term stress response?
A. Blood glucose levels increase B. Blood flow to muscle increases C. Heartbeat and blood pressure increase D. Reduction of inflammation