Communication & Homeostatis

Question 1

What’s the first messenger?

Answer 1

A hormone

Question 2

What’s the second messenger?

Answer 2

A signalling molecule

Question 3

What do alpha cells (pink stained) secrete?

Answer 3

Glucagon

Question 4

What do beta cells (purple stained) secrete?

Answer 4

Insulin

Question 5

What detects change in temperature?

Answer 5

Thermoreceptors in hypothalamus detect change in internal temperature
Thermoreceptors in skin detect change in external temperature

Question 6

What’s thermoregulation?

Answer 6

Control of body temperature

Question 7

How is heat lost once vasodilation happens?

Answer 7

Heat is lost via radiation

Question 8

What hormones are released when temperature too cold?

Answer 8

Adrenaline and thyroxine

Question 9

What do the hormones which are released when temperature too cold do?

Answer 9

They increase metabolism which generates heat

Question 10

How much energy is released when a phosphate molecule is removed in hydrolysis in ATP?

Answer 10

30 kJ