Approximately how many alveoli do the lungs contain?
a. 50 million
b. 500 million
c. 5 billion
d. 50 billion
e. 500 billion
b
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Kwashiorkor may develop in children who have dietary deficiencies of
A) proteins. B) carbohydrates. C) fiber. D) lipids.
The primary factor responsible for moving the chyme forward in the small intestine is
a. mass movement b. migrating motility complex c. a gradient in the frequency of segmentation along the length of the small intestine d. sequential ring-like contractions that move progressively forward along the length of the small intestine in a stripping motion, pushing the chyme ahead of the contraction e. stimulation of the intestinal smooth muscle by enterokinase
A person with type O blood should receive a blood transfusion from a donor with
A. type B blood. B. type A blood. C. any type of blood. D. type O blood. E. type AB blood.
The term "metabolism" refers to
A. all the chemical reactions in the body. B. reactions involving the synthesis of complex molecules from simpler ones. C. reactions involving the breakdown of complex molecules into simpler ones. D. reactions involving the breakdown of complex molecules or the exchange of atoms between similarly sized reactants. E. digestive system reactions that are either catabolic or exchange reactions.