Which of the following lipids is formed of four interlocking carbon rings?
A) phospholipid
B) cholesterol
C) triglyceride
D) trans fat
E) unsaturated fat
B
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Which of the following is the best explanation of why it is difficult to discriminate the color of an object at night?
A) Rods contain a single kind of visual pigment. B) Cones come in three types, each sensitive to different wavelengths of light. C) The foveae are densely packed with cones. D) As many as 100 cones may converge on one ganglion cell.
Which of these is NOT a type of photoreceptor?
A. red cone B. blue cone C. green cone D. yellow cone
The portion of the hair that extends above the surface of the skin is the ________.
A. medulla B. shaft C. cuticle D. root E. hair bulb
The otolithic membrane functions in hearing and in maintaining equilibrium.
Answer the following statement true (T) or false (F)