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Human Body Temperature Regulation

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Questions and Answers

What is the primary function of the preoptic anterior hypothalamus?

To regulate body hair growth

To regulate blood pressure

To control sweat gland secretion

To maintain a relatively constant core body temperature (correct)

What is the primary role of eccrine sweat glands in the human body?

To regulate body hair growth

To maintain skin hydration

To regulate blood pressure

To facilitate heat loss through evaporation (correct)

How much heat would be removed from the skin if 520 mL of sweat evaporated during a 30-minute period?

250 kcal

301.6 kcal (correct)

400 kcal

350 kcal

What is the significance of high relative humidity and high ambient temperature on body heat loss?

It decreases body heat loss and increases body temperature Signup and view all the answers

What is the primary difference between acclimation and acclimatization?

Acclimation involves rapid adaptation to environmental change, while acclimatization involves long-term adaptation Signup and view all the answers

What is the effect of clothing on heat loss through evaporation?

It decreases heat loss through evaporation Signup and view all the answers

What is a benefit of acclimation to cold environments, in terms of peripheral circulation?

Improved ability to maintain a higher hand and foot temperature Signup and view all the answers

What is the minimum volume of aerobic exercise required to achieve health-related benefits?

7.5 MET-hr/week Signup and view all the answers

What is the primary factor that determines the exercise dose-response curve?

Intensity Signup and view all the answers

What is the range of intensity associated with improvements in cardiorespiratory fitness?

40-89% of either heart rate reserve or oxygen uptake reserve Signup and view all the answers

What is the purpose of the heart rate reserve method in calculating the target heart rate range required during aerobic exercise?

To calculate the target heart rate range required during aerobic exercise Signup and view all the answers

What is the recommended frequency of resistance training for overall health-related benefits?

2 times per week Signup and view all the answers