__________ are the photoreceptors responsible for color vision.
Fill in the blank(s) with the appropriate word(s).
Cones
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Which of the following structures does not pass through the hilum of the lungs?
A. Pulmonary arteries B. Superior (lobar) bronchi C. Pulmonary trunk D. Main (primary) bronchi E. Pulmonary veins
The major regulator of respiration is the plasma concentration of
A. oxygen. B. carbon dioxide. C. water vapor. D. nitrogen. E. chloride.
Premotor and supplementary motor areas, with input from the ____________________, plan the ____________________ motor command that is issued to the appropriate motor neurons by the primary motor cortex through a descending system
Fill in the blank(s) with correct word
Which of the following nerves is associated with the lumbosacral plexus?
A. phrenic B. median C. musculocutaneous D. ulnar E. obturator