Since the thyroid gland regulates metabolism, some signs of hyperthyroidism are:
A) emaciation
B) polyphagia
C) PU
D) PD
E) all of the above
E
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Which of the following is the best explanation of why it is difficult to discriminate the color of an object at night?
A) Rods contain a single kind of visual pigment. B) Cones come in three types, each sensitive to different wavelengths of light. C) The foveae are densely packed with cones. D) As many as 100 cones may converge on one ganglion cell.
Where is most protein in the body found?
A) In the lymphatic system B) In the skeletal system C) In the the cardiovascular system D) In the integumentary system E) In the muscular system
One way in which gametogenesis differs between the two sexes is that in spermatogenesis,
A) The mature gametes lack mobility. B) Four viable haploid gametes are produced from one germ cell. C) Chromosome number is halved only after the second meiotic division. D) The germ cells are diploid.
Answer the following statements true (T) or false (F)
1. One of the first signs of labor is the rupture of the “bag of waters.” 2. The birth weight of a baby usually triples by age 4 months. 3. Boys start and finish their early-teen growth spurt earlier than girls. 4. In older adulthood, the costal cartilage begins to soften, leading to a condition called “barrel chest.” 5. The prenatal period is the time before birth.