The capture of one photon of light in a photoreceptor can block the entry of _______ Na+ ion(s) .
A) one
B) thousands of
C) hundreds of thousands of
D) millions of
Correct Answer:
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Q10: Cones in the retina form synapses with
Q11: The human retina has about _ million
Q12: Molecules of photopigment are concentrated in the
Q13: The visual system integrates stimuli over time;
Q14: Receptor cells and bipolar cells release the
Q16: The chemical within rods that reacts to
Q17: The G protein that is active when
Q18: The photoreceptor substance phosphodiesterase
A) activates transducin.
B) reduces
Q19: The most important factor influencing adaptation to
Q20: The brightest light at which we can
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