The area where the major vessels lead to and from the heart's chambers is called the ________ of the heart. The pointy, inferior portion is called the ________.
A. atrium; ventricle
B. base; apex
C. apex; base
D. endocardium; epicardium
E. ventricle; atrium
Answer: B
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A flu vaccine is needed seasonally to be effective but a polio vaccine is only needed once. The best explanation of this is ________
A) the flu vaccine is substantially weaker than the polio vaccine B) exposure to flu vaccine produces no memory cells from proliferating B-lymphocytes C) the polio virus is substantially weaker than the flu virus D) the flu has several strains that change seasonally
Tom is in respiratory arrest due to an electrical shock. Why does a good samaritan have up to 4 or 5 minutes to begin CPR and save Tom's life?
A. There is reserve oxygen in Tom's lungs. B. There is a venous reserve of oxygen in Tom's blood. C. The ambient Po2 can support life that long. D. The Haldane effect lasts up to 5 minutes. E. Tom's hypoxic drive will keep him alive for up to 5 minutes.
Alpha EEG rhythm is descriptive of or occurs during
A. slow-wave sleep. B. paradoxical sleep. C. both slow-wave sleep and paradoxical sleep. D. neither slow-wave sleep nor paradoxical sleep.
Which of the following is an ascending pathway in the spinal cord?
A. Tectospinal tract B. Lateral corticospinal tract C. Lateral spinothalamic tract D. Anterior corticospinal tract E. Rubrospinal tract