Adrenaline and Thyroxine ?

Question 1

What is Adrenaline ?

Answer 1

Adrenaline is a hormone released by the adrenal gland, which are above the kidneys

Question 2

How is adrenaline release in response to stressful or scary situations ?

Answer 2

Your brain detects fear or stress and sends nervous impulses to the adrenal glands, which respond by secreting adrenaline

Question 3

How does adrenaline get the body ready for fight or flight ?

Answer 3

By triggering mechanisms that increase the supply of oxygen and glucose to cells in the brain and muscles. For example, adrenaline increases he are t rate

Question 4

How can your body control the levels of hormone in the blood ?

Answer 4

By using negative feedback:

When the body detects that the level of a substance has given above or below the normal level, it triggers a response to bring the level back to normal again ‘.

Question 5

What is Thyroxine ?

Answer 5

A hormone released by the thyroid gland which is in the neck

Question 6

What does Thyroxine play an important role in ?

Answer 6

In regulating basal metabolic rate

Question 7

What is the basal metabolic rate ?

Answer 7

The spies at which chemical reactions in the body occur while the body is at rest.

Question 8

What else is Thyroxine important for ?

Answer 8

Loads of processes in the body, such as stimulating protein synthesis for growth and development

Question 9

When is Thyroxine released ?

Answer 9

Thyroxine is released in response to thyroid stimulating hormones (TSH), which is released from the pituitary gland.

Question 10

How does a negative feedback system keep the amount of thyroxine in the blood at the right level ?

Answer 10

When the level of thyroxine in the blood is higher the normal, the secretion of TSH from the pituitary gland is inhibited. This reduces the amount of thyroxine released from the thyroid gland, so the level in the blood falls back towards normal