"Segmentation" within the small intestine refers to the
A. back-and-forth motion that mixes chyme with glandular secretions.
B. gastroileal reflex that moves materials from the stomach to the large intestine.
C. propulsion of material between the segments of the GI tract.
D. division of function between the different segments of the small intestine.
Answer: A
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Chewed food mixed with saliva is called a ________, which is swallowed once mastication is complete.
Fill in the blank(s) with the appropriate word(s).
Smooth muscle
A) does not use calcium. B) is not resistant to fatigue. C) contracts faster than skeletal muscle. D) does not undergo tetanus. E) uses primarily aerobic metabolism.
Why are the psoas major and the iliacus sometimes called the iliopsoas?
A. They join at their inferior ends and have the same insertion. B. They join at their superior ends and have the same origin. C. They both extend the thigh. D. They are both innervated by the femoral nerve. E. All of these are true.
Viagra is used to treat erectile dysfunction by prolonging the effects of ________ on blood vessels.
A. nitric oxide (NO) B. GABA C. substance P D. dopamine