Multiple Choice
Which statement best describes the central principle of physiology related to homeostasis?
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1. Introduction to Anatomy & Physiology
Homeostasis
Multiple Choice
Which of the following is an example of positive feedback?
A
release of glucagon to increase a lower-than-normal level of glucose in the blood
B
labor contractions causing the release of oxytocin, which results in an increase in the quantity of labor contractions
C
shivering to generate heat when body temperature is below normal
D
release of insulin to decrease a high level of glucose in the blood
Verified step by step guidance1
Understand the concept of feedback mechanisms: Feedback mechanisms are processes that help maintain homeostasis in the body. They can be either positive or negative.
Define positive feedback: Positive feedback amplifies or increases the occurrence of events. It is a process where the output of a system acts to enhance the changes to the input of the system.
Identify examples of positive feedback: In the context of physiology, positive feedback is less common than negative feedback. A classic example is labor contractions during childbirth.
Analyze the given options: Evaluate each option to determine if it represents positive feedback. Positive feedback should involve a process that enhances or increases the initial stimulus.
Select the correct example: Labor contractions causing the release of oxytocin, which results in an increase in the quantity of labor contractions, is an example of positive feedback because the release of oxytocin intensifies the contractions, further promoting the process.
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