The changes that occur in a woman's body at menopause are due to
A. atrophy of the thermoregulatory center of the hypothalamus.
B. reduced levels of estrogen and progesterone.
C. increased production of androgens by the adrenal gland.
D. depletion of oocyte supply.
E. fluid retention that disrupts the osmotic balance of the body.
B
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Acetylcholine usually induces an excitatory postsynaptic potential when binding to ________ receptors and an inhibitory postsynaptic potential when binding to some ________ receptors.
A. muscarinic; nicotinic B. muscarinic; NMDA C. nicotinic; muscarinic D. NMDA; nicotinic
The study of the development of the human organism during the first two months after fertilization is called
A) genetics. B) embryology. C) pediatrics. D) anthropology. E) gerontology.
In X-linked inheritance, the gene for albinism is located on an X chromosome. If the father has albinism and mother is normal, the chance for the child to be a normal carrier (genotype) is:
a. 0% b. 25% c. 50% d. 75% e. 100%
Which of the following statements best illustrates the fact that skeletal muscle is voluntary muscle?
A) Skeletal muscle is wrapped in several layers of connective tissue. The deepest layer being the endomysium. B) Skeletal muscle appears striated due to the structure of the sarcomeres. C) Skeletal muscle fibers are innervated by somatic motor neurons. D) The shivering reflex aids in maintaining body temperature.