Question

Which hormones increase BP?

Answer 1

Hint: Hormones are chemicals which act away from the site of their release by organisms. Blood pressure is increased by the hormone secreted by the adrenal glands which is also called suprarenal glands. Increase in blood pressure helps in fulfilling the requirement of energy in the body.

Complete answer:
Hormones are informational molecules secreted by the endocrine cells in one part of the body in response to change in external or internal environment and carried by blood to another part where they stimulate or inhibit specific physiological processes for the good of the body as a whole. In other words, the hormones are chemical messengers that regulate the biological processes in the organisms.
Noradrenaline and adrenaline are formed from amino acid tyrosine and have the same basic effect. However, the two differ in their effect on blood vessels. Noradrenaline causes vasoconstriction of all blood vessels whereas adrenaline causes vasoconstriction of blood vessels supplying the skin and gut and vasodilation of blood vessels vascularizing the muscle and the brain Noradrenaline is also produced at the axon terminals of sympathetic nerve fibers to transmit nerve impulses from them to smooth muscles and glands.
The action of both the hormones are widespread throughout the body to whip up metabolism for preparing the animal to face special conditions created by physical stress such as fall in blood pressure, muscular excretion, pain, cold, shock and other emotional stresses. All these conditions require more energy which is provided by increasing heart beat, blood pressure, respiratory rate, sugar level of blood and skeleton muscles.
Adrenaline is the hormone which is also called as "fight or flight hormone" is secreted by adrenal glands that is mainly responsible for increase in blood pressure in the body.

Note-
Adrenal secretion is regulated by pituitary. Pituitary gland is an important pea - sized organ that is responsible for the secretion of many hormones in the body. It is called the “master gland " because it tells the other glands to release their hormones. It regulates the vital functions and general well being of a person.