thyroxine and adrenaline

What is adrenaline

Adrenaline is a hormone released by the adrenal gland

Adrenaline releases in fear or stress and prepares the body for flight or fight by triggering a series of rapid changes

How does adrenaline prepare the body for flight or fight( what is its function

It increases blood pressure and heart rate ensuring more blood flows to the muscles and brain.

It also increases breathing rate which bring more oxygen into the body

Adrenaline increases blood glucose levels to provide extra energy and increase the rate of respiration in cells

What is thyroxine and what is it’s function

Hormone released by the thyroid gland. Thyroxine regulates our day to day metabolism

Thyroxine helps control the basal metabolic rate which is important in regulating protein synthesis, for growth and development

What happens if you don’t have an adequate amount of thyroxine

Normal development cannot occur

What is adrenaline and thyroxine both controlled by

Negative feedback system

What’s the function of negative feedback back system

Regulation - when levels of a hormone rise too high or fall too low it triggers responses to bring the level back to normal

Using the negative feedback system explain what happens when thyroxine gets too low or too high

The release of thyroxine is controlled by thyroid stimulating hormone (TSH) which is released by the pituitary gland,

When levels of thyroxine in blood is too low the Pituitary gland secretes more TSH this stimulates the thyroid gland to release more thyroxine bringing levels back to normal.

If thyroxine levels are too high, the secretion of TSH from the pituitary gland is reduced. This decreases the amount of thyroxine released from thyroid bringing levels back down to normal.

Why is negative feedback so important

Negative feedback is crucial for maintaining homeostasis without it hormone levels can fluctuate widely causing serious disruption to bodily functions