When blood glucose is low, the pancreas releases glucagon, a peptide hormone which stimulates the liver to produce and excrete glucose. Binding of the hormone to its receptor triggers a "second messenger" cascade pathway that results in a change in the concentration or activity of many enzymes and signaling intermediates. The activity of some pathway enzymes is altered, as is the direction of net flow through some pathways.
1. How does glucagon stimulation affect the concentration or activity of enzymes?
a. [fructose-2,6-biphosphate]
b. adenyl cyclase
c. protein kinase A
d. phosphorylase b kinase
e. phosphofructokinase-2
f. fructose-2,6-biphosphatase
g. glycogen synthase kinase
h. [3,5-cyclic AMP]
Options:
O Increases
O Decreases

Based on anatomical similarities, to which modern animal is dr. digger’s creature most closely related?

Which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.the framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center.because membranes are fluid, membrane proteins and phospholipids can drift about in the membrane.the diverse proteins found in and attached to membranes perform many important functions.the kinky tails of some proteins keep the membrane fluid by preventing the component molecules from packing solidly together.membranes include a mosaic, or mix, of carbohydrates embedded in a phospholipid bilayer.

Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide