(7.3) Control and Coordination

Question 1

What happens when adrenaline is secreted?

Answer 1

Heart beats faster: more oxygen in muscles
Contraction of muscles around arteries in digestive system and skin: blood moves skeletal muscles
Contraction of rib muscles and diaphragm: breathing rate increases

Question 2

Where does adrenaline come from

Answer 2

adrenal glands

Question 3

What is the endocrine system?

Answer 3

The network of glands and organs that uses hormones for control and coordination

Question 4

Why is iodine important?

Answer 4

It is essential for the production of thyroxin by the thyroid gland

Question 5

What is thyroxin’s function? What if it is not secreted?

Answer 5

It regulates the metabolism of carbohydrates, proteins and fats to create the best balance for growth

If not, we can suffer from goitre. Symptoms include swollen neck

Question 6

Gland which secretes growth hormones
What if it is not secreted in childhood

Answer 6

Pituitary Gland
Dwarfism

Question 7

Glands and hormones responsible for changes associated with puberty

Answer 7

Ovary: Oestrogen
Testis: Testosterone

Question 8

Insulin gland and function

Answer 8

Pancreas
Regulating blood sugar levels