The cell type that is responsible for maintaining bone once it has been formed is the
A. osteocyte.
B. chondrocyte.
C. osteoblast.
D. osteoclast.
E. chondroblast.
A
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A young man who ran 6 miles a day throughout high school is injured during his first season running cross country in college. He must rest for three months and then gradually begin exercising again. The skeletal muscles in his lower limbs decrease in size during this prolonged period of inactivity. The organelles that break down his muscle proteins are
A. ribosomes. B. centrosomes. C. peroxisomes. D. lysosomes.
The T-tubular membrane contains ________ receptors that are ________ and therefore respond to action potentials. This receptor is mechanically linked to ________ receptors in the adjacent sarcoplasmic reticulum.
What will be an ideal response?
Which of the following is NOT a part of the peripheral nervous system?
A) cranial nerve B) ganglion C) spinal cord D) spinal nerve
What condition is described by high temperature, low blood pressure, and profuse sweating?
A. Heat stroke B. Heat exhaustion C. Hypothermia D. Fever