Multiple Choice
Which type of neuronal organization is most commonly associated with positive feedback loops in neural circuits?
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1. Introduction to Anatomy & Physiology
Feedback Loops: Positive Feedback
Multiple Choice
In the context of homeostatic control, blood clotting is an example of which type of feedback mechanism?
A
Negative feedback, because the response reduces the initial stimulus by reversing the change
B
Negative feedback, because it maintains variables like blood glucose near a set point
C
Positive feedback, because activated platelets and clotting factors amplify the clotting response until the break in the vessel is sealed
D
Neither, because it is controlled only by the nervous system and not by feedback mechanisms
Verified step by step guidance1
Step 1: Understand the concept of feedback mechanisms in homeostasis. Negative feedback works to reverse a change and maintain stability, while positive feedback amplifies a response until a specific outcome is achieved.
Step 2: Identify the role of blood clotting in the body. Blood clotting is a process that stops bleeding by forming a clot at the site of a vessel injury.
Step 3: Analyze how the clotting process works. When a blood vessel is damaged, platelets become activated and release chemicals that attract more platelets and clotting factors, amplifying the response.
Step 4: Recognize that this amplification continues until the break in the vessel is sealed, which is characteristic of a positive feedback mechanism rather than negative feedback.
Step 5: Conclude that blood clotting is an example of positive feedback because the response enhances the initial stimulus (vessel injury) until the problem is resolved.
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