15) The hormone that is released from the hypothalamus is oxytocin. The hormone increases the intensity of the contractions.
16) When the intensity of the contractions increase, the stimulus will increase because an increase in contractions equals an increase in pain for the mother. Oxytocin is a natural painkiller that aids a women during childbirth, so the body releases more when more pain is present.
Hess' cognitive rigor matrix number 16 and 17
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A positive feedback system is defined by the fact that the stimulus increases when the response mechanism is activated. The stimulus (the release of oxytocin) is indeed increased when the response (uterine wall contractions) mechanism is activated. As explained above, the increase in pain calls for an increase in painkillers.
18) The event that will stop the stimulus, thus stopping the feedback loop, is the actual full birth of the child. The goal of the feedback loop is to release the child, so when the goal is accomplished, the cycle stops.
19) a. The stimulus of the feedback loop regarding platelets clotting your cuts is the activation of platelets. The response is the signal that the platelets send out, attracting more platelets to the area, accelerating the clotting process. This feedback loop is an example of a positive feedback loop because the response (the signal sent out) increases the stimulus (the activation of platelets).
b. The stimulus of the feedback loop is the loss of blood pressure. The response is the release of autidiuretic hormone (ADH), which allows the kidney to fix the blood pressure. This feedback loop is an example of a negative feedback loop. This is so because the response (the release of ADH) decreases the stimulus (the drop in blood