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Showing posts from November, 2011

Pancreas - Type of cells and hormones secreted

Islet cell Mass Hormone Secreted Functions Alpha Cells 17% Glucagon Raises Blood sugar level Beta Cells 70% Insulin Lowers Blood sugar level Delta Cells 7% Somatostatin It inhibits release of Glucagon-Pancreas Growth hormone-hypothalamus Gastrin-GIT F Cells 5% Pancreatic polypeptide Regulates the release of pancreatic digestive enzymes and contraction of gall bladder

Difference between Gram positive and Gram negative bacteria : A comparision

Features Gram Positive Organisms Gram negative Organisms Peptidoglycan Layer Thick and highly cross linked Thin and lightly cross linked Cellular Membrane Single Double- Inner & Outer Teichoic acid Present Absent Lipoteichoic acid Present Absent Pores Absent Present Lipopolysaccharide Absent Present Exotoxins Usually produced Usually not produced Endotoxins Usually absent Usually present Susceptibility to Beta lactam antibiotics Usually present Usually absent

Probenecid and penicillin combination explained in animation