Temperature Readings Under Different Conditions

What was Jane's starting set-point temperature (°F) under the Heat condition?

• 98.0

• 97.2

• 99.5

• 96.8

After 5 minutes of Exercise, what was Theo's temperature (°F)?

• 100.4

• 98.6

• 99.2

• 101.0

Which condition resulted in the lowest temperature for Jane after 5 minutes?

• Heat

• Exercise

• Cold

Theo's temperature after 10 minutes of Heat was higher than Jane's temperature after 10 minutes of Heat.

• True

• False

Jane's temperature after 10 minutes of Cold was ____ °F.

• 97.7

• 98.6

• 96.5

• 99.2

Which individual had a higher starting set-point temperature under the Exercise condition?

• Jane

• Theo

The Sun transfers heat to Jane and Theo’s bodies as they sit on the sunny bench, increasing their body temperature. Which of the following responses by their bodies would help decrease their temperature and maintain homeostasis? Choose ALL that apply.

• Vasodilation; their skin will turn red as blood is moved to the surface of the skin.

• Goosebumps; the muscles under the hair in their skin will contract.

• Vasoconstriction; their extremities will turn pale or blue as blood moves to the core of the body.

• Sweating; the water released from their skin will evaporate.

Temperature regulation in the body is an example of a negative feedback mechanism because:

• it counteracts changes in body temperature to maintain homeostasis, such as sweating when hot and shivering when cold.

• it amplifies changes in body temperature, making the body hotter or colder.

• it only responds to increases in body temperature, not decreases.

• it works independently of any feedback mechanisms in the body.

Which of the following is an example of a negative feedback mechanism that helps maintain homeostasis in body temperature?

• Sweating to cool the body

• Shivering to increase body temperature

• Vasodilation in response to heat

• Goosebumps in response to cold

• All of the above

When body temperature increases, the body responds by _______ to release heat and reduce the body temperature back to its normal value.

• sweating

• shivering

• eating

• sleeping