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

Mike was adopted, and his biological family history is unknown. although he is healthy, he would like some understanding of his genetic makeup, including potential health risks and genes that he could pass on to his children. mike has heard about commercial laboratories that can compare segments of your dna to those of people with common hereditary diseases in order to give you some idea of how susceptible you are to the diseases. the results of these types of tests are highly inconclusive. if mike's dna showed that he shares similarities in a segment of dna with people who have a given disease, his chances of developing that disease or passing it on to his children may be slightly elevated, but they are not 100 percent. these tests can cost more than $2,500 and are not covered by many insurance companies. do you think that mike should undergo the genetic tests? explain your answer. what are the potential pros and cons of having such tests done? describe how the availability of these genetic tests might affect the frequency of genetic diseases in individuals and populations.

What is any method of measuring the age of an object or event in years, such as using atomic half-life?

Select the star life cycle that is accurate