A positive feedback mechanism is the exact opposite of a negative feedback mechanism. ... In a positive feedback system, the output enhances the original stimulus. A good example of a positive feedback system is child birth. During labor, a hormone called oxytocin is released that intensifies and speeds up contractions.
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Answer:
Denise is hit by a softball while attending a friend's game. When she gets to the emergency department, she is told that she has injured her cornea. Given what Denise knows about the visual system, she knows that this is the part of the eye which is transparent and covers the pupil, iris and the interior chamber. She also would know that the cornea along with the lens and the interior chamber, is involved in refracting lights which makes it the primary tool for the eyes optical power.
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