Negative Feedback

• adrenaline is produced by the adrenal glands in times of fear or stress
• Adrenaline increases the heart rate and boosts the delivery of oxygen and glucose to the brain muscles, preparing the body for fight or flight
• Thyroxine from the thyroid gland stimulates the basal metabolic rate. It plays an important part in growth and development
• Thyroxine levels are controlled by negative feedback