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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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).
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.
Blindness caused by abnormal blood vessel growth in the retina is
A. macular degeneration. B. glaucoma. C. cataracts. D. conjunctivitis.
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.