Topic 19- The Skin And Temperature Control

Question 0

What are the 4 ways in which the body controls the temperature?

Answer 0

Vasodilation/ vasoconstriction
Hairs can stand up or lay flat
Production of sweat
Shivering

Question 1

What labels of the structure of the skin can be asked in the exam?

Answer 1

Hair
Erector muscle
Sweat gland
Sweat duct
Sweat pore
Blood vessels

Question 2

What happens during vasodilation?

Answer 2

Blood vessels expand which allows blood to flow to the surface. This release heat by radiation

Question 3

What happens during vasoconstriction?

Answer 3

The vessels constrict to cut the blood flow so less heat is lost

Question 4

What happens when hairs stand ?

Answer 4

Air is trapped and acts as an insulator and stops heat loss

Question 5

What happens when hairs lie flat?

Answer 5

Erector muscles relax and there is no longer an insulating layer. Heat is then lost

Question 6

What happns when sweat is produced?

Answer 6

The sweat evaporates and releases heat

Question 7

What happens when the body shivers?

Answer 7

Muscles contract to warm the blood