PATHOLOGY

PATHOLOGY MCQ

ENDOCRINE SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue growing until the cut is closed.
A
Positive Feedback Response
B
Negative Feedback Loop
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Puberty results in very rapid somatic growth, brain development, sexual maturation, and attainment of reproductive capacity. It is accompanied by final maturation of multiple organ systems and major changes in the central nervous system and in psychosocial behavior (Patton and Viner 2007).

Detailed explanation-2: -Blood Clotting As the platelets continue to amass, more of the chemicals are released and more platelets are attracted to the site of the clot. The positive feedback accelerates the process of clotting until the clot is large enough to stop the bleeding.

Detailed explanation-3: -One example of biological positive feedback is at the onset of contractions in childbirth. When contraction occurs, oxytocin is released into the body stimulating more contractions. Thus, the result is an increased amplitude and frequency of contractions. Another example is during the process of blood clotting.

There is 1 question to complete.