Understanding Thermoregulation and Homeostasis

What is the primary function of the hypothalamus in thermoregulation?

• To open blood vessels near the skin

• To contract muscles for shivering

• To secrete sweat onto the skin

• To measure the temperature of the blood

What process involves the widening of blood vessels near the skin to release heat?

• Shivering

• Sweating

• Vasodilation

• Vasoconstriction

How does sweat help in cooling the body?

• By insulating the skin

• By evaporating and taking heat away

• By being cold itself

• By contracting muscles

What is the term for the process of blood vessels narrowing to conserve heat?

• Homeostasis

• Vasoconstriction

• Thermoregulation

• Vasodilation

What is the role of goose pimples in thermoregulation?

• To increase blood flow

• To trap a layer of air for insulation

• To decrease body temperature

• To secrete sweat

What is the normal operating temperature of the human body?

• 37 degrees Celsius

• 38 degrees Celsius

• 36 degrees Celsius

• 35 degrees Celsius

What is the term for organisms that maintain a constant body temperature?

• Thermophiles

• Endotherms

• Ectotherms

• Psychrophiles

Which of the following is an example of negative feedback in thermoregulation?

• Fluctuating body temperature

• Maintaining body temperature

• Decreasing body temperature

• Increasing body temperature

What happens to blood vessels during vasodilation?

• They contract

• They narrow

• They widen

• They secrete sweat

What is the primary purpose of shivering?

• To secrete sweat

• To widen blood vessels

• To warm the body

• To cool the body