Homeostasis

Question 1

What happens when blood glucose is too high?

Answer 1

Beta cells release insulin
Body cells take up more glucose
Liver takes up glucose and stores it as glycogen

Question 2

What happens when blood glucose is too low?

Answer 2

Alpha cells release Glucagon into the blood
Liver breaks down glycogen –> glucose
Blood glucose levels rise

Question 3

Cell Temperature range

Answer 3

0-40’C

Question 4

Where do animals get their heat from?

Answer 4

The sun

Chemical energy from respiration

Question 5

Poikilothermic

Answer 5

Warm blooded

Question 6

Homeothermic

Answer 6

Cold blooded

Question 7

Ectothermic animals heat source

Answer 7

environmentr

Question 8

Endothermic animals heat source

Answer 8

within the body

Question 9

Mechanism when body temperature rises

Answer 9

Thermostat in hypothalamus activates cooling mechanism

Sweat glands secrete sweat

Blood vessels dilate; capillaries fill with warm blood; heat radiates from skin surface

Question 10

Mechanism when body temperature drops

Answer 10

Thermostat in hypothalamus activates warning mechanisms

Skeletal muscles contract, causing shivering which generates heat

Blood vessels in skin constrict, diverting blood from skin to deeper tissues, reducing heat loss from skin surface