Differentiation is
A) the transfer of genetic information from one generation to the next.
B) the gradual change in anatomical and physiological characteristics from conception to maturity.
C) the formation of more specialized cell types through selective changes in genetic activity.
D) the fusion of two haploid gametes that results in one diploid zygote.
E) a developmental stage of the embryo where body shape becomes discernable.
C) the formation of more specialized cell types through selective changes in genetic activity.
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The branch of the trigeminal nerve that has a somatic motor component is the:
a. opthalmic nerve b. mandibular nerve c. maxillary nerve d. hypoglossal nerve
The ilioinguinal and iliohypogastric nerves:
A) innervate the psoas muscle. B) pass posterior to the quadratus lumborum. C) are both L1 ventral rami. D) together form the lumbosacral trunk. E) supply the adductor muscles of the thigh.
The pigment that causes one's normal skin color is ________.
What will be an ideal response?
As individuals age, the efficiency of the respiratory system typically
A) increases somewhat. B) decreases. C) changes in proportion to the rate of change of body weight, as occurs in young individuals also. D) does not change as much as does that of most other systems. E) responds more rapidly to immediate changes but cannot maintain the response over as long a duration.