Which of the following is NOT true of colorblindness?
A. Protanopia involves a lack of or a decrease in sensitivity to the blue-sensitive cones.
B. Deuteranopia involves a lack of or a decreased sensitivity to green-sensitive cones.
C. Males and females can be colorblind, but the condition is more common in males.
D. It is a hereditary trait carried on the X chromosome.
E. All of these are true of colorblindness.
Answer: A
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Which of the following is not a function of epithelial tissue?
A. Selective permeability B. Sensation C. Physical protection D. Secretion E. No exceptions; these are all functions of epithelial tissue.
The azygos and hemizygos veins are a continuation of the right and left ascending lumbar veins.
Answer the following statement true (T) or false (F)
In which condition is the quantity of circulating platelets less than normal?
A. Anemia B. Thrombocytopenia C. Leukemia D. Polycythemia
The opening of the neural tube that is closest to the future head is the
A. anterior neural fold. B. cranial neuropore. C. rostral neural groove. D. caudal neural canal. E. neural crest aperture.