Photosynthesis
EYE
HORMONES
EFFECT OF ADERNALINE
Adrenaline has several effects which are designed to help
you to cope with danger. These effects are known as the
‘fight or flight’ response. For example, your heart beats
faster, supplying oxygen to your brain and muscles more
quickly. This allows your muscles to carry out aerobic
respiration more quickly, giving them more energy for
fighting or running away. Your breathing rate increases, so
that more oxygen can enter the blood in the lungs.
Adrenaline also causes the pupils in the eye to widen. This
allows more light into the eye, which might help you to see
the danger more clearly.