Explain how the human body responds when adrenaline is secreted into the blood.

(N/A) When adrenaline is secreted into the blood,the heart beats faster,which results in the supply of more oxygen to our muscles.
The blood supply to the digestive system and skin is reduced due to the contraction of muscles around small arteries in these organs.
This diverts the blood to our skeletal muscles to prepare the body for 'fight or flight' responses.
The breathing rate also increases because of the contractions of the diaphragm and the rib muscles,allowing for increased oxygen intake.