In the adult, the ductus arteriosus persists as a fibrous cord called the __________.
a. ligamentum arteriosum
b. umbilicus
c. ductus venosus
d. fossa ovalis
Answer: a. ligamentum arteriosum
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Which of the following is true of joints that are first-class levers?
A. The fulcrum is in the middle. B. Their mechanical advantage is always less than 1.0. C. Their output force is always greater than the input force. D. Their resistance is between the fulcrum and the distal end of the bone. E. The fulcrum is at the opposite end from the tendinous attachment.
Which region of the brain controls breathing?
A. Hypothalamus B. Cerebrum C. Medulla oblongata D. Occipital lobe
The clinical term for joint inflammation is
A) rheumatism. B) atherosclerosis. C) bursitis. D) bunions. E) arthritis.
If left untreated, congenital hypothyroidism will result in mental disability.
a. true b. false