What does the first heart sound signal the onset of?
a. atrial systole
b. atrial diastole
c. ventricular systole
d. ventricular diastole
e. firing of the SA node
c
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A(n) ________ is a localized elevation of the skin often accompanied by itching.
A. erosion B. wheal C. pustule D. macule
The citric acid cycle
A) begins with the formation of a molecule of citric acid. B) directly produces most of the ATP from the catabolism of glucose. C) consumes two moles of carbon dioxide. D) contains enzymes called cytochromes. E) forms acetyl-CoA from glucose-6-phosphate.
Which of the following statements concerning the masseter muscle is correct?
A. It is the most superficial muscle of facial expression. B. It originates from the zygomatic arch. C. It inserts on the medial surface of the mandible's angle. D. It depresses the mandible during jaw movement.
The medial concavity of the kidney is called the ________, which admits the renal nerves, blood vessels, lymphatic vessels, and ureter.
A. cortex B. corpuscle C. capsule D. hilum E. medulla