After birth, the foramen ovale is closed as a result of
A. increased resistance in the pulmonary circuit.
B. increasing pressure in the right atrium.
C. decreased blood volume in the pulmonary veins.
D. increasing pressure in the left atrium.
Answer: D
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Which feature of WBCs makes them particularly important in tissue injury?
A) They undergo aerobic respiration. B) They stick to injured blood vessels. C) They undergo a fast rate of mitosis. D) They can squeeze out through blood vessel walls into tissues. E) They carry loads of oxygen.
Which structure extends posteriorly from the hard palate and is inferior to the nasopharynx?
A) larynx B) vestibule C) soft palate D) external nares E) internal nares
Which of the following is NOT a function of the stomach?
A. Segmental contractions B. Absorption of aspirin C. Protein digestion D. Storage
The microscope of choice for a detailed three-dimensional study of the surface of a specimen is the
A. telescope. B. transmission electron microscope. C. light microscope. D. scanning electron microscope.