Answer:
When
the organisms confronts any scary situation, adrenaline is secreted from the
adrenal gland and sent directly into the blood which is then circulated to various
parts of the body, resulting into the following The main target organs include
the heart which beats faster. As a result, more amount of oxygen is supplied to
the muscles.
(ii) The blood is supplied to digestive system and the skin is reduced
due to contraction of muscles around small arteries. This divert the blood to
the skeletal muscles.
(iii) The breathing rate also increases because of the contractions
of the diaphragm and rib muscles. (3)
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