Which of the following examples does NOT illustrate the interrelationship of form and function?
A. Heart valves are designed and placed within the heart so that they are opened and closed by changing pressures in the chambers in the heart during one cardiac cycle (the events that occur during the time from one heartbeat to the next).
B. In a negative feedback system, the product of the response "feeds back" to depress or eliminate the original stimulus.
C. The second cervical vertebra (second bone of the spine) has a small process on it that acts as a pivot point so that the first cervical vertebra (top bone in the spinal column) can rotate to the left and right to allow you to shake your head "no."
D. Door hinges have a pin around which the door rotates when it is opened and closed.
Answer: B. In a negative feedback system, the product of the response "feeds back" to depress or eliminate the original stimulus.
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