Gas exchange occurs in the _____ unit
a. bronchi
b. bronchioles
c. blood stream
d. alveolar-capillary
d
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The ______________ is the site of most vitamin absorption into the body.
a. large intestine b. stomach c. small intestine d. mouth
Most North Americans have trouble consuming a diet containing all the essential amino acids.
a. true b. false
Children's intakes of which nutrients typically fall below recommendations?
a. vitamin B6 and protein b. vitamin A and vitamin C c. sodium and potassium d. fat and fiber e. vitamin D and iron
The opioid peptide, __________________, promotes eating and has pain-reducing properties. This morphine-like substance acts on the feeding centers of the hypothalamus to stimulate the consumption of highly palatable foods, such as fats. It may also play some role in stress-induced eating
a. Neuropeptide Y b. Peptide YY c. Dynorphin d. Galanin