Which of the following parts of a rib articulates with the body of a vertebra?
A. Groove
B. Neck
C. Head
D. Body
E. Sternal end
Answer: C
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The optic tracts carry visual information from the retina to the
A) pulvinar nuclei. B) lateral geniculate nuclei. C) medial geniculate nuclei. D) supraoptic nuclei. E) paraventricular nuclei.
The wall of the left ventricle is thicker than the wall of the right ventricle because the
a. left ventricle must pump much more blood than the right ventricle so it must have stronger walls. b. right ventricle must pump much more blood than the left ventricle so it has a larger chamber to accommodate the blood and a correspondingly thinner wall. c. left ventricle must pump the same amount of blood into the high-resistance, high-pressure systemic system as does the right ventricle into the low-resistance, low-pressure pulmonary system. d. right ventricle must create higher tension within its walls. e. left ventricle must pump oxygenated blood, which requires more energy than pumping unoxygenated blood.
What type of cell specializes in killing virus-infected, cancer, or foreign graft cells directly?
A) cytotoxic T cells B) regulatory T cells C) antigen-presenting cells D) helper T cells
The area of the skin that provides sensory input to the CNS via one pair of spinal nerve is called
a) a dermatome. b) a microtome. c) perineurium. d) a fascicle. e) an epitome.