Question

exit ticket: humans sweat to reduce their body temperature and maintain homeostasis. which best describes the feedback mechanism involved in sweating? a. it is a positive feedback loop because the body is adding heat to the skin. b. it is a negative feedback loop because the body is pulling in heat from the skin. c. it is a negative feedback loop because it is an attempt to reverse a change in the bodys condition. d. it is a positive feedback loop because it is an attempt to intensify a change in the bodys condition. explain your answer.

Explanation:

To determine the correct answer, we analyze the concepts of positive and negative feedback loops in homeostasis:

1. Understand Feedback Loops:

• Negative feedback works to reverse a change in the body's condition to maintain homeostasis (e.g., cooling the body when it's too hot).
• Positive feedback intensifies a change (e.g., blood clotting, childbirth).

1. Analyze Sweating:

• Sweating occurs when the body is too warm. The evaporation of sweat cools the body, reversing the initial increase in temperature.
• Option A (positive, adding heat) is incorrect because sweating cools, not heats.
• Option B (negative, adding heat) is incorrect as sweating doesn’t add heat.
• Option D (positive, intensify) is incorrect because sweating reverses, not intensifies, the temperature change.
• Option C (negative, reverse change) matches: sweating is a negative feedback loop as it attempts to reverse the body’s elevated temperature (a change in condition) to restore homeostasis.

Answer:

C. It is a negative feedback loop because it is an attempt to reverse a change in the body's condition.