Which of the following is not a way to conserve or generate heat?
A) shivering thermogenesis
B) nonshivering thermogenesis
C) vasoconstriction in the skin
D) increasing the depth of respirations
E) release of thyroxine
D
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If an ultrasound scan reveals that a fetus at six weeks of gestation is approximately the size of Lincoln on a penny,
A) the fetus is too small for its age. B) the fetus is developing at a normal rate. C) this fetus is probably only one of a multiple birth. D) there is probably a problem with the placenta. E) None of the answers are correct
Glaucoma can result from
A. inhibition of the circulation of aqueous humor. B. damage to the suspensory ligament. C. a decrease in the number of cones. D. opacity of the lens. E. increased amounts of vitreous humor.
Thyroid hormone contains the mineral
A) sodium. B) iron. C) thallium. D) iodine. E) zinc.
Near the end of the first trimester, deoxygenated blood flows from the developing embryo or fetus to the placenta through
A) paired umbilical veins. B) the superior vena cava. C) one umbilical vein. D) three umbilical arteries. E) paired umbilical arteries.