What are the hormones secreted by the adrenal medulla, Biology

Assignment Help:

What are the hormones secreted by the adrenal medulla? What are their respective functions?

The medullary portion of the adrenals secretes hormones of the catecholamine group: adrenaline (also called as epinephrine) and noradrenaline (also called as norepinephrine). Besides their hormonal function, adrenaline and noradrenaline act as neurotransmitters too. The neurons that use them as neurotransmitters are known as adrenergic neurons.

Adrenaline increases the glycogen breaking into glucose (glycogenolysis) therefore increasing glycemia and the basal metabolic rate of the body. Adrenaline and noradrenaline are released during situations of danger (fightfight or flight response) and they intensify the strength and rate of the heartbeat and selectively modulate the blood irrigation in some tissues by selective vasodilation and selective vasoconstriction. By vasodilation they enhance the blood supply to the brain, the muscles and the heart and by vasoconstriction they decrease the blood supply to the kidneys, the skin and the gastrointestinal tract.

Substances like adrenaline and noradrenaline that promote vasodilation or vasoconstriction are known as vasoactive substances.

 


Related Discussions:- What are the hormones secreted by the adrenal medulla

How the slides and specimens used as instructional resources, Explain how t...

Explain how the slides and specimens used as instructional resources?  Ans) They act as an Identifier, so that we can judge them simply

State whether the factor can lead, With your understanding of bone and musc...

With your understanding of bone and muscle tissue (cells and the extracellular material) discuss two lifestyle factors (one for bone and one for muscle) that affect the growth, dev

Meat snack products, S n a c k Products Meat snacks such as curls; ...

S n a c k Products Meat snacks such as curls; chips are made from sliced, whole meat and comminuted meat. Extruded snacks are made from meat and non meat ingredients. Extru

Define functions of organic phosphorus, Define functions of Organic Phospho...

Define functions of Organic Phosphorus? It is involved in the following reactions/components: a) Structural component of nucleic acids: It is important component of DNA and

Name the enzyme which catalyzes reaction of light emission, Several living ...

Several living organisms exhibit the unique property of producing visible light. Compound that is oxidized with subsequent light emission is generally referred to as luciferin. Wha

Mention chemical agents available for sterilization, Q. Mention chemical ag...

Q. Mention chemical agents available for sterilization? Various chemical agents available for sterilization are: Alcohols: ethyl alcohol, isopropyl alcohol, trichlorobuta

Biochemical production, Plants are the source of a large variety of bioche...

Plants are the source of a large variety of biochemicals which are metabolites of both primary and secondary metabolism. But secondary metabolites are of much greater interest s

Mode of hormone action through intracellular receptors, MOD E OF HORMONE A...

MOD E OF HORMONE ACTION THROUGH INTRACELLULAR RECEPTORS - Steroid hormones are lipid-soluble and easily pass through the cell membrane of a target cell into the cytoplasm.

Uricotelism, Normal 0 false false false EN-IN X-NONE ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Determine the acidity in the given sample of honey, Q. Determine the acidit...

Q. Determine the acidity in the given sample of honey? This activity will help you to: • carry out the acidity test of the given samples of honey, • learn about the kee

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd