Question

True or False

1. Pyrethroids work as Sodium channel agonists. 2. Insulin is a peptide hormone and Cortisol is a steroid hormone. 3. Pancreatic islets contain alpha cells (secrete insulin), beta cells (secrete glucagon). 4. White adipose tissue (WAT) stores energy whereas brown adipose tissue (BAT) dissipate energy as heat and thus, increase expenditure. 5. Glyphosphate inhibits acetylcholinesterase. 6. Streptozotocin was originally identified as an antibiotic but it was later found to be selectively toxic to the beta cells of pancreatic islets.

Answer 1

Statement 1 is TRUE: For causing prolonged current, Pyrethroids bind to open Na+ channels and stabilize the open sate.

Statement 2 is TRUE: Insulin is a peptide harmone and Cortisol is a steroid harmone

Statement 3 is FALSE: Beta cells secrete insulin and alpha cells produces the hormone glucagon.

Statement 4 is TRUE: WAT stores the extra energy as TGs and BAT dissipates chemical energy as heat. BAT controls energy expenditure of the whole body.

Statement 5 is FALSE: Glyphosate weakly inhibits acetylcholinesterase (not glyphosphate)

Statement 6 is TRUE: Streptozocin was originally identified as antibiotic in late 1950 but later, around mid-1960s , it was found to be selectively toxic to the beta cells of pancreatic islets.