Color vision
a. is accomplished by rods at night and cones during the day.
b. depends on the three cone types' various ratios of stimulation in response to different wavelengths of light.
c. is usually lost in vitamin A deficiency.
d. depends on activation of a specific cone for each visible color.
e. is made possible by convergence within the cone pathways.
B
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Blood or ________________________________________ feathers have blood flowing through them and can grow as new feathers or replace molted ones
Fill in the blank(s) with correct word
Vasodilation of the blood vessels supplying a tissue increases the flow of blood to that area
Indicate whether the statement is true or false
Judy runs 50 miles a week. She and her husband have been trying to conceive for three years, with no luck. Her disturbed reproductive cycles and infertility are due to
A. increased synthesis of estrogens. B. decreased synthesis of estrogens. C. decreased secretion of adrenal androgens. D. increased secretion of adrenal androgens.
Which bone has an anterior crest?
A) Fibula B) Tibia C) Ulna D) Radius