Adrenaline causes a reduction in blood flow to the digestive system and skin due to muscle contractions around small arteries, diverting blood to skeletal muscles. Additionally, the breathing rate increases due to contractions of the diaphragm and rib muscles.

The endocrine system, represented by the secretion of hormones like adrenaline, provides a second way of control and coordination in the body. Unlike the nervous system, which relies on electrical impulses through nerve cells, the endocrine system uses chemical signals ...

The primary role of adrenaline is to prepare the body for a response to a situation. It causes the heart to beat faster, supplying more oxygen to muscles. It also diverts blood from the digestive system and skin to skeletal ...

Adrenaline is secreted into the blood, reaching all cells of the body, and inducing widespread changes. This contrasts with relying solely on electrical impulses, which would have a more limited range of tissue instructions.

Abscisic acid is beneficial for a plant in situations where growth needs to be restricted. Its inhibition of growth, leading to effects like wilting of leaves, can help the plant conserve resources during periods of stress or unfavorable environmental conditions.