control of body temp

Question 1

What is core temperature?

Answer 1

Blood temperature
36-37.5 degrees in a Human

Question 2

Why must body temperature be maintained?

Answer 2

To keep enzymes at an optimum temperature
Homeostasis

Question 3

What can change body temperature?

Answer 3

Illness
Environment
Metabolism
Exercise
‘Fat’ around your body
Blood Loss

Question 4

Vasodialation

Answer 4

Heat loss from the body because more blood flows to the surface of the skin ~ increased energy transfer

Question 5

Why do we sweat when we get too hot?

Answer 5

As the sweat evaporates from the skin there is an increased energy transfer away from the body

Evaporation causes cooling

Question 6

What responses do humans do when we get too hot?

Answer 6

Sweat
Vasodilate
Hairs on body lie flat
Lower Metabolism

Question 7

What responses do humans do when we get too cold?

Answer 7

Raise metabolism
Sweat less
Hairs on body stand up
Vasoconstrict
Shiver

Question 8

Vasoconstriction

Answer 8

When blood flows further away from the surface of the skin to decrease energy transfer to surroundings

Question 9

Why do we shiver when we are cold?

Answer 9

Move muscle fibres = respiration = heat

Question 10

Why do our body hairs stand up when we are cold?

Answer 10

To create an insulating layer trapping warm air

Question 11

What causes shivering?

Answer 11

Skeletal muscles contract rapidly
(when we are cold)