The document summarizes the target organ effects of adrenaline in the body. It lists various organs like the heart, breathing centre of the brain, skin arterioles, and digestive system arterioles. It explains how adrenaline causes the heart to beat faster, breathing to become faster and deeper, skin and digestive system blood vessels to constrict, and muscles to tense. The overall effects are to rapidly provide more glucose and oxygen to muscles to prepare the body for fighting or fleeing.

12. Target Organ Effects of Adrenaline Biological Advantages Effect or Sensation
Heart Beats faster Sends more glucose
and oxygen to the
muscles
Thumping heart
Breathing centre of
the brain
Faster and deeper
breathing
Increased oxygenation
of blood; rapid
removal of
carbondioxide
Panting
Arterioles of the skin Constricts them Less blood going to
the skin means more
is available to the
muscles
Person goes paler

13. Arterioles of the
digestive system
Constricts them Less blood for the
digestive system allows
more to reach the
muscles
Dry mouth
Muscles of alimentary
canal
relax Peristalsis and digestion
slow down; mare energy
available for action
Hollow feeling in
the stomach
Muscles of body Tenses them Glucose available in
blood for energy
production
Tense feeling;
shivering
liver Conversion of
glycogen to glucose
Fatty acid available in
blood, for muscle
contraction
Fat depots Conversion of fats to
fatty acids
No
sensation