Question

activity 1/2
sisters: feedback loops
ostasis and negative/positive feedback
sisters
multiple - choice question
what does negative feedback do?
causes harm to the body
encourages the body to increase the effect of the variable
allows the body to come back to a set point

Explanation:

Negative feedback is a regulatory mechanism in the body. Its main function is to maintain homeostasis. When a variable in the body deviates from its set - point (e.g., body temperature, blood glucose level), negative feedback initiates a counter - response. This counter - response works to oppose the change in the variable and bring it back to the normal or set - point range. For example, if body temperature rises above the normal range (the set - point), negative feedback mechanisms (such as sweating to cool the body) are activated to lower the temperature back to the set - point.

• The option “Causes harm to the body” is incorrect because negative feedback is a beneficial, life - sustaining mechanism.
• The option “Encourages the body to increase the effect of the variable” is characteristic of positive feedback (e.g., during childbirth, where uterine contractions are intensified), not negative feedback.

Answer:

Allows the body to come back to a set point