It’s been five hours since you had your last meal, which has made your blood-glucose level drop. how is your endocrine system to maintain this level?
a.) the pituitary gland produces antidiuretic hormone (adh), which stimulates the kidneys to break down glycogen into glucose and release it into the blood.
b.) the thyroid gland produces thyroxine, which stimulates the metabolic rate so that more glycogen is broken into glucose and released in the blood.
c.) the pancreas produces glucagon, which stimulates the liver to break down glycogen into glucose and release it into the blood.

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true