Which of the following statements is true about GI muscle contractions?
A) Tonic contractions are sustained for minutes and occur in the small intestine.
B) Phasic contractions last only seconds and occur in the stomach and small intestine.
C) Contractions of the smooth muscle do not depend on calcium.
D) Cycles of smooth muscle contraction and relaxation are associated with fast wave potentials.
E) None of these statements are true.
B) Phasic contractions last only seconds and occur in the stomach and small intestine.
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A) perilymph; endolymph B) endolymph; perilymph C) endolymph; air D) cerebrospinal fluid; perilymph E) perilymph; air
Urine is carried from the kidney to the bladder by the:
a. ureter b. urethra c. bronchiole d. none of the above
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Which of the following may be used in PET scans as biological tracers that can be followed through the body?
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