As the bone matrix calcifies and the secreting cells become walled in,
A. osteoclasts become osteocytes.
B. osteoblasts become osteoclasts.
C. osteoblasts become osteocytes.
D. osteogenic progenitors become osteoclasts.
Answer: C
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A) G1 phase B) G0 phase C) S phase D) G2 phase
Which of the following is a condition resulting from a hereditary defect in elastin fibers characterized by hyperextensible joints, tall stature, long limbs, and vision problems?
A. Osteogenesis imperfecta B. Marfan syndrome C. Havers syndrome D. Scurvy E. Klinefelter syndrome
Which of the following is incorrect pertaining to the pelvis during pregnancy?
A) The true (conjugate) distance between the sacral promontory and the posterosuperior aspect of the pubic symphysis increases. B) The hormone, relaxin, relaxes the pelvic ligaments. C) The transverse diameter of the pelvis is increased. D) The amount of pelvic rotation permitted around the sacrum is increased. E) The coccyx is permitted to move more posteriorly.
A single motor neuron together with all the muscle fibers it innervates is called a(n)
A) end foot. B) end plate. C) motor unit. D) dermatome. E) myotome.