All hormones interact with their target cells by first binding to a membrane-bound receptor.
a. true
b. false
Answer: b. false
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Adequate Ca2+ absorption from the GI tract depends on
A. adequate amounts of vitamin C. B. the osmolality of the extracellular fluid. C. adequate amounts of vitamin D. D. serum K+ levels. E. serum calcitonin levels.
knowing the innervation to each muscle enables clinicians to diagnose which of the following?
a) damage to blood vessels serving muscles. b) osteoarthritis. c) nerve, spinal cord & brain stem injuries. d) broken bones.
Channels in the plasmalemma that can open or close to regulate the passage of water, small ions, and water-soluble molecules are called ________ channels.
Fill in the blank(s) with the appropriate word(s).
Blindness caused by abnormal blood vessel growth in the retina is
A. macular degeneration. B. glaucoma. C. cataracts. D. conjunctivitis.