Question

1. a student conducted an experiment measuring body temperature in humans after 10 minutes of exercise. which is the most likely explanation for the pattern observed? time (minutes) temperature (°c) 0 37.8 5 38.0 10 38.5 15 37.2 20 37.8 b. sweating and blood vessel dilation help return body temperature to normal c. the body fails to regulate temperature after exercise a. positive feedback causes temperature to rise continuously c. exercise permanently raises body temperature

Explanation:

When the body temperature rises during exercise, sweating (evaporative cooling) and blood vessel dilation (increased heat loss) are part of the negative - feedback mechanism to regulate body temperature. Positive feedback would cause a continuous rise, but the temperature here returns to near - normal. The body does not fail to regulate (as it returns to normal), and exercise does not permanently raise body temperature.

Answer:

B. Sweating and blood vessel dilation help return body temperature to normal