Which of the following visceral reflexes is not coordinated by the medulla oblongata?
A) swallowing reflex
B) vasomotor reflex
C) coughing reflex
D) cardioacceleratory reflex
E) pupillary reflex
E
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Which statement correctly identifies the phase of the cardiac cycle that occurs when the pressure in the ventricles is lower than the pressure in the great arteries but greater than the pressure in the atria?
A. Active ventricular filling B. Passive ventricular filling C. Period of ejection D. Period of isovolumetric contraction
Compression of which vessel could cause unconsciousness?
A. Carotid artery B. Jugular vein C. Subclavian artery D. Vertebral vein
Each of the following factors would increase peripheral resistance except
A) increased sympathetic stimulation. B) elevated levels of epinephrine. C) vasodilation. D) irregularities in the vessel walls caused by plaques. E) elevated hematocrit.
The sustentacular cells
A. mature to form sperm cells. B. produce testosterone. C. provide nourishment for development of sperm. D. cover and protect most of the testes. E. produce seminal fluid.