Question

1. this flowchart shows how a person who has an infection develops a fever. notice that the person is shivering, even though his body temperature is at the normal set point = 37°c. explain why he is shivering. cells that are fighting an infection release a chemical signal that is carried by the blood to the temperature control center. this chemical signal increases the set point for temperature regulation to ~39°c (102°f). body temperature is 37°c. temperature control center detects that body temperature is below the new set point. shivering → more heat generated, so body warms. → body temperature increases to the higher set point.

Explanation:

Infection - fighting cells release a chemical signal that raises the body's temperature set - point to ~39°C. The current body temperature is 37°C, which is below this new set - point. The temperature control center detects this temperature difference. Shivering is a response triggered by the control center to generate more heat. When the body shivers, muscle contractions occur, and these contractions produce heat. The purpose of this heat production is to increase the body temperature until it reaches the new, higher set - point of ~39°C.

Answer:

The infection - fighting cells release a chemical signal that raises the temperature set - point to ~39°C. Since the current body temperature (37°C) is below this new set - point, the temperature control center triggers shivering. Shivering causes muscle contractions that generate heat to warm the body until it reaches the new set - point.