6B - Regulation of body temperature

Question 1

Thermoregulation for humans?

Answer 1

Body temperature is regulated by metabolic processes due to humans being ectotherms

Question 2

Conduction meaning

Answer 2

Transfer of heat through physical contact

Question 3

Conduction example

Answer 3

Heat from a hot mug transferred to your hands

Question 4

Convection meaning

Answer 4

Transfer of heat via the movement of a liquid or a gas between areas of different temperatures

Question 5

Convection example

Answer 5

Heat moves to higher ground in a house

Question 6

Evaporation meaning

Answer 6

Loss of heat when water transforms into gas

Question 7

Evaporation example

Answer 7

Sweating on the skin evaporates

Question 8

Radiation meaning

Answer 8

Transfer of heat through electromagnetic waves (no contact required

Question 9

Radiation example

Answer 9

Sun warms you through radiation

Question 10

What happens when it is too hot?

Answer 10

• sweat glands
• vasodilation
• cerebral cortex
• arrector pili muscles
• decreased metabolic rate

Question 11

What happens when it is too cold?

Answer 11

• Skeletal muscles
• vasoconstriction
• body hair stands
• increased metabolic rate

Question 12

What is vasodilation?

Answer 12

Of blood vessels to increase surface blood flow

Question 13

What is cerebral cortex?

Answer 13

the brains outermost layer of nerve cell tissue

Question 14

What is arrector pili muscles

Answer 14

cause body hair to flatten

Question 15

What is decreased metabolic rate?

Answer 15

to reduce amount of heat produced

Question 16

What is vasoconstriction?

Answer 16

blood vessels to reduce surface blood flow and heat loss

Question 17

Thermoregulation- negative feedback system? (stimulus response model)

Answer 17

Stimulus- Change in internal body and environmental temperature
Receptors- Thermoreceptors
Modulator- Hypothalamus
Effector- Variety of cells and tissues
Response- change that alters heat transfer in body