On your way to class, you decide to cross a busy street but fail to notice a fast-moving car coming toward you
When you do see the car, your heart rate and breathing increase, and you feel a burst of energy that helps you quickly move to the sidewalk. Describe how your nervous system was able to process the sight of the car with the need to move your legs.
The nervous system relies on a series of sensory neurons to keep you aware of conditions in the external environment. When your eyes saw the car, this stimulus generated an action potential that was sent via sensory neurons to an integration center that in turn processed the meaning of the signal and produced an appropriate response, or motor output. In this case, the burst of energy suggests that the fight-or-flight response was activated.
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A general process of movement of molecules against a concentration gradient, which requires ATP, is ________
Fill in the blank(s) with the appropriate word(s).
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a. true b. false
Which one of the following enables the detection and perception of color images?
A. cone cells B. rod cells C. optical nerve D. visual cortex