Homeostasis and Thermoregulation

Which process produces heat in every living cell?

• Digestion

• Respiration

• Protein synthesis

• Photosynthesis

How is heat transferred around the body?

• Blood

• Water

• Sweat

• Skin

Why is the human body's core temperature 37^oC?

• Optimum temperature for enzymes

• No specific reason

• To limit the enzymes rate of reaction

• It's not 37^oC

Which organ in the body produces the most heat?

• Brain

• Small intestine

• Heart

• Liver

What is homeostasis?

• The maintenance of a constant internal environment

• The maintenance of a constant external environment

• The maintenance of an inconstant internal environment

• Negative feedback

If the environment gets cold, we will often shiver in order to _______.

• keep body temperature the same as the external temperature
• decrease body temperature
• increase body temperature
• regulate blood pressure

Homeostasis in the human body is often maintained by a _______.

• neutral feedback loop 
• solar feedback loop
• positive feedback loop
• negative feedback loop

What is the evaporation of a liquid to cool the body?

• Shivering
• Sweating
• Vasodilation
• Vasoconstriction

The term for maintaining an internal temperature is _______.

• thermoregulation

• thermometer

• homeothermal

• homeostasis

True or False?

When you are cold, you shiver and your blood vessels (arterioles) constrict, which warms you up. When you are hot, you sweat and your blood vessels dilate, which cools you down.

• True

• False