How would blockage of the auditory (Eustachian) tube at its exit in the nasopharynx by lymphatic tissue ("adenoids") affect ear function and health?
Blockage of the auditory tube leads to pain because pressure cannot equilibrate between the middle ear and the atmosphere. Also, fluid can accumulate (otitis media) in the middle ear, which is also painful and potentially infective. Untreated, adenoids can lead to scarring of the tympanum and some loss of hearing.
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Suppose the pubic symphysis did not exist in the pelvic girdle and the two pubic bones were fused in the middle. Which of the following best describes the way the region would be affected if this joint was removed?
A. The femurs would have a limited range of motion without the high-mobility symphysis joint. B. Childbirth would have a high mortality risk because the pelvic girdle would be rigid and unmoving. C. The femurs would grind inside the acetabulum and cause pain because of a lack of cartilage. D. The pelvic girdle would be highly unstable because the pubic symphysis adds stability and rigidity.
A pump is attached to the common carotid artery and red ink is pumped in. Which structures of the body will show the red ink?
A. The intercostal muscles and chest area B. The large intestine and portions of the small intestine C. The arms and the hands D. The neck and the head
The suprarenal (adrenal) medulla produces the hormones
A. epinephrine and norepinephrine. B. corticosterone and testosterone. C. norcortisol and cortisol. D. androgens and progesterone. E. synephrine and neosynephrine.
A defect in the curvature of the cornea or lens results in a condition called
A. astigmatism. B. presbyopia. C. hyperopia. D. emmetropia. E. myopia.