MICROANATOMY

Detailed explanation-1: -Catecholamines are hormones made chiefly by the adrenal glands, located above the kidneys. The main catecholamines are adrenaline (epinephrine), noradrenaline (norepinephrine), and dopamine. Catecholamines increase heart rate, blood pressure, breathing rate, muscle strength, and mental alertness.

Detailed explanation-2: -Epinephrine (Adrenaline) and Norepinephrine (Noradrenaline) Among other things, these hormones are capable of increasing the heart rate and force of heart contractions, increasing blood flow to the muscles and brain, relaxing airway smooth muscles, and assisting in glucose (sugar) metabolism.

Detailed explanation-3: -Adrenaline (epinephrine) is a hormone your adrenal glands make to help you prepare for stressful or dangerous situations. Adrenaline rush is the name for the quick release of adrenaline into your bloodstream. This gets your body ready for a “fight or flight” response.

Detailed explanation-4: -Adrenal medulla (epinephrine) Another neurotransmitter dopamine that has limited actions in the autonomic nervous system may excite or inhibit depending on the receptors. Dopamine can be converted into norepinephrine and thus can increase heart rate and blood pressure.

Detailed explanation-5: -We also know that there are specific sites on the cells of major organs, including the heart, called beta receptors, which respond to the adrenaline when it is released, by increasing the heart rate.