2 pts I. Multiple Choice Prolactin and thyrotropin (aka TSH) are synthesized in

Question

2 pts I. Multiple Choice Prolactin and thyrotropin (aka TSH) are synthesized in the: 1. a. mammary glands b. thyroid gland d. anterior pituitary e. posterior pituitary c. hypothalamus 2. The least vascular, fastest-contracting, and most fatigable skeletal myofibers are: a. type I b. type lla c. type IIb d. type IIx 3. A boy is born with a defective pituitary gland. With this defect, LH is secreted normally, but no FSH is produced. When the boy reaches puberty, one would expect him to: a. lack male secondary sex characteristics because he lacks testosterone b. be unable to have an erection c. be sterile because he does not form sperm cells d. have nonfunctional interstitial cells in his testes e. all of the above are correct f none of the above are correct As we age, the lens gradually becomes less and less flexible, resulting in both near- and farsightedness, a condition known as: 4. a. myopia b. hyperopia c. hypermetropia d. presbyopia 5. These first ganglion cells decussate at the optic chiasm, while these second ganglion cells do not. a. bipolar, unipolar b. temporal; nasal c. nasal; temporal d. lateral; medial

Explanation / Answer

1. D. Anterior pituitary.

Anterior pituitary also called adenohypophysis secretes prolactin and thyroid stimulating hormone (TSH).

2. C. Type II b

Type II b fibers are characterized by low vascular density, low resistance to fatigue and fastest contractibilty.

3. C. Be sterile and does not produce sperm cells.

FSH stimulates spermatogenesis in makes while as LH stimulates interstitial cells which produces testosterone. Lack of FSH will produce sterility due to inability to produce sperm.

4. Presbyopia.

It is a natural process of hardening of lens or eye with age who h results in farsightedness,near sightedness and other visual problems.

5.

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