Where does gas exchange occur in the lungs?
A. goblet cells
B. alveoli
C. larynx
D. respiratory bronchioles
Answer: B. alveoli
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Which is not one of the hamstring muscles?
A. Rectus femoris B. Biceps femoris C. Semimembranosus D. Semitendinosus
Bones grow longitudinally to lengthen.
Answer the following statement true (T) or false (F)
Circular folds are
A) ridges in the wall of the stomach. B) pleats in the lining of the small intestine. C) fingerlike projections on the surface of the mucosa of the small intestine. D) sacculations in the colon. E) abnormal structures formed by excessive pressure in the small intestine.
The secretion of ________ is controlled by a ________ mechanism.
A. oxytocin; positive-feedback B. antidiuretic hormone; positive-feedback C. antidiuretic hormone; negative-feedback D. oxytocin; negative-feedback