Question

john is participating in a marathon on a hot summer day. as he continues running, his body temperature begins to rise due to the heat and physical exertion. in response, his body initiates mechanisms to maintain homeostasis. which of the following represents the homeostatic response to johns increasing body temperature? a. the body decreases respiration rate to conserve energy. b. the body releases adrenaline to increase heart rate and blood pressure. c. the body increases sweat production to cool down through evaporation. d. the body reduces blood flow to the skin, causing the skin to become pale.

Explanation:

Homeostasis involves the body's ability to maintain a stable internal environment. When body - temperature rises during physical exertion on a hot day, one of the main responses is sweating. Sweating cools the body through the process of evaporation. Decreasing respiration rate would not be a homeostatic response to increased body temperature as it would not help dissipate heat. Releasing adrenaline increases heart rate and blood pressure which is more related to the fight - or - flight response rather than temperature regulation. Reducing blood flow to the skin would make it harder to dissipate heat and is not a typical homeostatic response to overheating.

Answer:

B. The body increases sweat production to cool down through evaporation.