Arnold enters a darkened movie theater on a sunny summer afternoon. It takes many
minutes for his eyes to adapt to the darkness because
A) it takes some time for the retina to rebuild its rhodopsin stores from opsin and
retinal.
B) the rods in the eye work only in bright light, and it takes time for the cones to work
in weak light.
C) the optic nerve fatigues in bright light, and it takes time to recover.
D) the iris takes time to close after being subjected to bright light.
A
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If blood pressure doubled, the blood flow through a vessel would be
A) doubled. B) halved. C) four times greater. D) 1/4 as much. E) unchanged.
Embryologically, which of the following is homologous to the dura mater?
A. Retina B. Ciliary body C. Lens D. Sclera E. Choroid
In which of these areas is the partial pressure of oxygen (PO2) normally the greatest?
A) inspired air B) alveolar air C) expired air D) pulmonary capillaries E) tissue capillaries
Select the correct pathway to form a monocyte through the process of leukopoiesis
A) HSC, myeloid cell line, monoblast, promonocyte, monocyte B) HSC, myeloid cell line, myeloblast, promyelocyte, monocyte band cell, monocyte C) HSC, lymphoid cell line, myeloid stem cell, monoblast, promonocyte, monocyte D) HSC, lymphoid cell line, monoblast, promonocyte, monocyte