The pancreas has both endocrine and exocrine functions
Indicate whether this statement is true or false.
TRUE
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Color vision:
a. depends on thee types of cone cells b. depends on rod cells c. is not detected in the eye but is a function of the brain d. usually occurs better in low levels of light e. depends on photopigments for seven different colors
Platelets form from large cells called __________.
a) thrombocytes b) lymphoblasts c) macrophages d) megakaryocytes
The gate control theory of pain is best described by which of the following?
A. TRP channels are gated by temperature. B. Activation of low threshold mechanoreceptors can reduce or block the activity of ascending pain pathways. C. GABA inhibits neurons in the spinal cord. D. Following sensitization, a pain fiber begins responding to nondamaging tactile stimuli.
Which of the following statements is NOT true of hyperopia?
A. corrected by "minus" lenses B. close objects are fuzzy C. eyeball is too short D. corrected by convex lenses E. image focused behind the retina