Which hormones secreted by adrenal medulla, Biology

Assignment Help:

Q. 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: noradrenaline (also known as norepinephrine) and adrenaline (also known as epinephrine). Besides their hormonal function noradrenaline and adrenaline act as neurotransmitters too and the neurons that use them as neurotransmitters are called adrenergic neurons.

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

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


Related Discussions:- Which hormones secreted by adrenal medulla

What is osteoblast, What is osteoblast The osteoblast is the key for th...

What is osteoblast The osteoblast is the key for the development of new bone. It is essential that a large number of osteoblasts accumulate on the implant surface(contact osteo

Explain about gestational diabetes mellitus, Q. Explain about Gestational D...

Q. Explain about Gestational Diabetes Mellitus ? During pregnancy, a woman who does not have a history of diabetes, may develop high blood glucose or sugar. This is GDM. The di

Locomotion in star fish, LOCOMOTION IN STAR FISH - With the help of tub...

LOCOMOTION IN STAR FISH - With the help of tube feet aided by fluid pressure in them. In a tube feet upper ampulla, middle podium and lower sucker present.

Describe nerve cells, In eukaryotes possibly the most rapid and complex sig...

In eukaryotes possibly the most rapid and complex signaling is mediated through nerve impulses.  The Nerve  cells  (neurons)  consist  of  a cell  body  with  numerous projections

What is standard operating procedure manual (sop), Question 1 What is s...

Question 1 What is standard operating procedure manual (SOP)? Do you think it is important to maintain SOPs in all the laboratories? List the advantages of maintaining SOPs in

Explain modified starches, Modified Starches In your opinion, what woul...

Modified Starches In your opinion, what would be an ideal starch for all industrial uses including in food use? Well, one would think an ideal starch  for most of the foods sho

Types of fats, FATS ARE OF TWO TYPES (a) Hard Fats They are t...

FATS ARE OF TWO TYPES (a) Hard Fats They are true fats which are solid at room temperature of 20 o C. It is due to presence of long chain saturated fatty acid

State the types of brain trauma, State the types of brain trauma? There...

State the types of brain trauma? There are two main types of brain trauma a) open head injury and b) closed head injury

Process for estimation of sucrose by fehling soxhlet method, Explain Proced...

Explain Procedure for Estimation of Sucrose by Fehling Soxhlet Method? Follow the proceedure enumerated herewith and carry out the experiment: 1. Standard titration (Standar

Seed, Seed A seed is a mature ovule enclosing an embryonic plant, stor...

Seed A seed is a mature ovule enclosing an embryonic plant, stored food material (in endosperm, persistent nucellus or embryo itself) and a seed coat formed by one or two inte

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