Which of the following is the best explanation for our perception of color?
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.
B
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The muscle that elevates the tongue is the
A) genioglossus. B) hyoglossus. C) palatoglossus. D) styloglossus. E) digastric.
The volume of air available for gas exchange per minute is called the ________.
A. vital capacity B. respiratory rate C. minute respiratory volume D. alveolar ventilation E. functional residual capacity
What would happen to a kidney's position if the perinephric fat layer were depleted and the collagen fibers of the fibrous capsule were to become detached?
A) The kidneys would be pulled anteriorly. B) The kidneys would be pulled posteriorly. C) The kidneys would be pulled medially. D) The kidneys would be pulled laterally. E) The kidneys would fall inferiorly.
Oxygen forms covalent bonds with two atoms of hydrogen to form H2O (water). How many electrons are found in oxygen's outer shell?
A. 4 B. 1 C. 8 D. 6 E. 2