researchwork. haha ginamit ang tabulas e.
POSTED AT 07:05 PM

yellowbells

(1) Somatostatin

Somatostatin is a peptide hormone that regulates the endocrine system and affects neurotransmission and cell proliferation via interaction with G-protein-coupled somatostatin receptors and inhibition of the release of numerous secondary hormones.

Pancreatic somatostatin is the same chemical substance as growth hormone inhibitory hormone (Somatostatin is also secreted by the hypothalamus and by the intestine). This hormone is secreted by delta cells and it consists of two polypeptides, one of 14 amino acids and one of 28. The principal role of somatostatin is to extend the period of time over which the food nutrients are assimilated into the blood.

** Regulation of secretion of somatostatin:  it is stimulated by increased blood glucose level,
increased amino acids, increased fatty acids,  increased CCK.

** Effect of somatostatin:
a. Depressing the secretion of both insulin and glucagon
b. Decreasing the motility of the stomach, the duodenum and the gallbladder
c. Decreasing both secretion and absorption in the  gastrointestinal tract
 Somatostatin has a variety of functions. Taken together, they work to reduce the rate at which food is absorbed from the contents of the intestine.

(2) Pancreatic polypeptide
Pancreatic polypeptide is a polypeptide secreted by PP cells in the endocrine pancreas predominantly in the head of the pancreas. It consists of 36 amino acids and has molecular weight about 4200 Da.
The function of PP is to self regulate the pancreas secretion activities (endocrine and exocrine), it also has effects on hepatic glycogen levels and gastrointestinal secretions and also with the reduction of appetite.
Its secretion in humans is increased after a protein meal, fasting, exercise, and acute hypoglycemia and is decreased by somatostatin and intravenous glucose.

References:
http://en.wikipedia.org/wiki/Pancreatic_polypeptide
http://en.wikipedia.org/wiki/Somatostatin
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Pancreas.html
http://www.endocrineweb.com/pancreas.html

 

A nonsecretor is an individual whose body secretions such as gastric juice, saliva, tears, and ovarian cyst mucin do not contain ABO blood group substances. Nonsecretors make up approximately one fifth of the population and are homozygous for the gene se.
http://www.docstoc.com/docs/9027782/Immunohematology

hmm tama ba?
POSTED AT 10:02 PM in Si Yellowbells

yellowbells

i miss going solo. my boyfriend is just very addicting. haha kailangan ko mahiwalay sa kanya paminsan-minsan.

Listening to: Forever Blue by Regine Velasquez (eww emo! haha!)

hehe. naisip ko lang.
POSTED AT 07:37 PM

yellowbells

nakakatamad mag-aral pero kailangan. acckk, sana mapilitan akong magbasa pagkainom ko ng cobra!