Each of the following statements regarding vision is true. Which statement best explains why we cannot see colors in dim light?
A. The human eye has three kinds of cone photoreceptors.
B. The lateral geniculate nucleus contains opponent color cells.
C. The human eye has only one kind of rod photoreceptor.
D. All photoreceptors contain the same chromophore.
E. Cone photoreceptors are concentrated in the fovea.
C
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Which of the capillaries shown in the figure has an incomplete or absent basement membrane?
a) A b) B c) C d) A and B e) A, B, and C
Which statement is true?
a. Mitochondria are primarily sites where anaerobic respiration occurs. b. Vaults are inclusions in the cytoplasm that transport DNA. c. Peroxisomes are membranous sacs that contain hydrolytic enzymes. d. Ribosomes are membranous organelles that synthesize proteins. e. None of the statements are true.
This is the master biological clock:
a. anterior pituitary b. posterior pituitary c. thyroid hormone d. arcuate nucleus e. suprachiasmatic nucleus
Which term below best describes the deltoid?
A) Intrinsic B) Extrinsic C) Parallel D) Fusiform E) Involuntary