Each of the receiving chambers of the heart has a wrinkled flaplike extension; the one that is more visible from an anterior view is the
A. interatrial septum.
B. interventricular septum.
C. left auricle.
D. right auricle.
D
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Chemical digestion in the small intestine involves ________.
A) a significant amount of enzyme secretion by the intestinal mucosa B) cholecystokinin (CCK), an intestinal hormone responsible for gallbladder contraction C) secretions from the spleen that contain all enzymes necessary for complete digestion D) bile salts that help emulsify carbohydrates so that they can be easily digested by enzymatic action
Pain originating from the spleen would most likely be felt in the ________ abdominopelvic quadrant.
A) right upper B) right lower C) left upper D) left lower E) left inguinal
Which of the following statements is true regarding the gray matter of the cerebrum?
A. It is located only in the cerebral cortex. B. It is found in the cerebral cortex of the frontal, parietal, and occipital lobes but does not cover the entire temporal lobe. C. It is found both in the superficial cortex and in deeper basal nuclei. D. It consists mainly of nerve cell bodies and unmyelinated fibers and is found both in the superficial cortex and in the substantia nigra. E. It consists mainly of nerve cell bodies and myelinated fibers.
If there is an increase in systemic blood pressure, the resulting stretch of afferent arterioles results in reflexive
A. vasodilation of afferent arterioles to keep GFR normal. B. vasodilation of efferent arterioles to lower GFR. C. vasoconstriction of afferent arterioles to keep GFR normal. D. vasoconstriction of efferent arterioles to raise GFR.