Hormones of pancreas, Biology

Assignment Help:

HORMONES OF PANCREAS AND THEIR ROLE -

(i) Glucagon (Secreted by a-cells)

  • It stimulates the liver to convert stored glycogen into glucose.
  • Glucagon is controlled by feedback in accordance with the level of glucose in the blood. When the blood sugar rises, the secretion of glucagon is suppressed and when it drops, the secretion of glucagon is stimulated.

Target Cells. Glucagon acts on the cells of the liver and adipose tissue.

(ii) Insulin (Secreted by b-cells)

  • It was first prepared / found by Benting and Best.
  • A. F. sanger coined the term insulin & proposed the molecular structure of insulin (cow's insuline)
  • Human insulin was synthesized by "Tsan".
  • Insulin was the first protein that was artificially synthesized in laboratory and is crystallized.
  • One molecule of insulin is made up of 51 amino acids that has 2 chains - (i) a-chain. It is made up of 21 aminoacids.

(ii) b-chain. It is made up of 30 amino acids. Both the branches or chains are bind together with cross bonds of disulphide bonds.

(iii) Somatostatin (SS)

It regulates the secretion of insulin and glucagon.

Target Cells. Both somatostatin and pancreatic polypeptide act on the cells of the pancreas.

(iv) Pancreatic Polypeptide (PP).

It appears that pancreatic polypeptide inhibits the release of digestive' secretion of the pancreas.

Both somatostatin and pancreatic polypeptide are relatively newly discovered hormones of the pancreas, and both are still being studied.


Related Discussions:- Hormones of pancreas

Explain the dietary modifications - obesity, Explain the Dietary Modificati...

Explain the Dietary Modifications - Obesity? The dietary modifications serve as a guide for the obese to make healthy food choices. The first step towards prescribing a diet fo

Kinase, A kinase is in general an enzyme which catalyzes the transfer of th...

A kinase is in general an enzyme which catalyzes the transfer of the phosphate group from ATP to something else. In the molecular biology, it has acquired the more specific verbal

Do sponges have circulatory system, Q. Do sponges have circulatory, nervous...

Q. Do sponges have circulatory, nervous and excretory systems? Sponges do not have a nervous system neither excretory system nor circulatory system.

Mating and fertilisation, Mating and Fertilisation In all animals sper...

Mating and Fertilisation In all animals sperms are motile and have to move and seek the eggs to fertilise them. For this an aqueous environment is necessary. This need of a li

The signals for parturition originate from, The signals for parturition ori...

The signals for parturition originate from: 1. placenta only 2. placenta as well as fully developed foetus 3. oxytocin released from maternal pituitary 4. fully develop

Define risk assessment, Define Risk assessment Risk  assessment  has  ...

Define Risk assessment Risk  assessment  has  been  described  as  the process  of  organizing  information concerning a particular  risk in  a systematic way  so  that the dec

.rRNA , rRNA structure and synthesis assignment

rRNA structure and synthesis assignment

Examples of human cells that produce proteins, Q. What are few examples of ...

Q. What are few examples of human cells that produce proteins for exportation? Which cytoplasmic organelle is expected to be abundant and well-developed in those cells? Special

Natural selection under different environments condition, In the absence of...

In the absence of any large scale envirorrmental change that is, in more or less uniform environments, populations often maintain a stable genetic constitution with respect to many

How to grow root hairs, How to grow root hairs Hairs can simply be seen...

How to grow root hairs Hairs can simply be seen on the roots of mustard seed grown on a damp flannel. Seeds placed on an earthenware dish standing in a soup plate having water

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