When Adenylate Cyclase Is Activated by a Hormone,the Concentration of Cyclic

question 22

Multiple Choice

When adenylate cyclase is activated by a hormone,the concentration of cyclic AMP increases in the cell even though the hormone does not enter the cell.This is an example of the __________________ mechanism of hormone action.

• A)altering membrane transport
• B)altering activity of DNA
• C)second messenger
• D)all of the above answers are correct

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Definitions:

Migratory Restlessness

The increased activity and restlessness observed in migratory animals, especially birds, as they prepare for their long-distance flights during migration seasons.

Genetic Differences

Variations in the genes among individuals or populations, which contribute to the biodiversity and heritable traits within species.

Migratory Orientation

The innate or learned ability of animals, particularly birds, to navigate and migrate over long distances across changing environments.

DNA Methylation

A biochemical process involving the addition of a methyl group to the DNA molecule, affecting gene expression without changing the DNA sequence.