Gray matter on the surface of the brain is called ________.
A. a nucleus
B. a ganglion
C. a tract
D. the cortex
Answer: D
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Undescended testes cause infertility because
A) they undergo apoptosis, and can no longer produce sperm. B) there is too little testosterone. C) they become entangled in the seminiferous tubules, which then degenerate. D) sperm development is impeded by the higher internal body temperature.
Swelling is always a negative symptom which should be prevented at all costs
Indicate whether the statement is true or false.
The nose is divided into right and left halves called the __________.
A. nasal cavities B. nasal fossae C. nasal septa D. nasal vestibules E. nasal apertures
When ventricular pressure exceeds atrial pressure, the
A. blood is pumped into the atrium. B. ventricle is in diastole. C. atria pump blood into the ventricles. D. AV valves close. E. ejection occurs.