Adrenaline and thyroxine

Question 1

What is adrenaline?

Answer 1

• Adrenaline is a hormones released by the adrenal gland, just above the kidneys

Question 2

When is adrenaline released?

Answer 2

• Its released in scary, stressful situations, your brain detects fear or stress and sends nervous impulses to the adrenal gland, which responds by secreting adrenaline

Question 3

How does adrenaline prepare your brain?

Answer 3

• it gets your brain ready for ‘fight or flight ‘ by triggering mechanism that increase the supply of 02 and glucose to cells in muscles and brain. example = increasing heart rate

Question 4

How does the body control levels of hormones in the blood?

Answer 4

• by using negative feedback systems.
• when body detects something is too high or below the normal level, it triggers off a response to bring it back to normal.