Quiz on Homeostasis and Thermoregulation

What does the term homeostasis mean?

• The absorption of nutrients

• The regulation of blood pressure

• The process of digestion

• Maintaining a constant internal environment

Which of the following is a function of thermoregulation?

• Regulating blood sugar levels

• Maintaining body temperature

• Controlling heart rate

• Digesting food

What is the principal heat-regulating center in the human body?

• Cerebellum

• Medulla oblongata

• Cerebrum

• Hypothalamus

Which of the following is an example of an endotherm?

• Fish

• Lizard

• Frog

• Polar bear

What happens to enzymes at temperatures above 45°C?

• They are destroyed

• They become more efficient

• They function normally

• They increase metabolic rate

What is the normal core body temperature in humans?

• 39°C

• 36°C

• 37°C

• 38°C

Which mechanism is used by the body to prevent heat loss in cold weather?

• Vasodilation

• Vasoconstriction

• Increased sweating

• Increased respiration

What is the term for animals that cannot regulate their body temperature?

• Ectotherms

• Endotherms

• Poikilotherms

• Homeotherms

Which of the following is a characteristic of endotherms?

• Maintain a constant body temperature

• Cold-blooded

• Body temperature fluctuates with the environment

• Require external heat sources

What is the role of sweat glands in thermoregulation?

• Store heat

• Cool the body through evaporation

• Increase body temperature

• Regulate blood pressure