Why is it important for signal transduction systems to trigger a rapid response within a cell and be able to be shut down quickly?
a. all signal transduction cascades are shut down immediately so as to prevent the cell from mounting a response.
b. cells are unable to respond quickly to hormones, and therefore signal transduction cascades always occur over a long time.
c. cells have to be able to function alone, because they are unable to work together in a coordinated fashion.
d. cells often have to respond very quickly to changes in their internal and external environments.

Cells often have to respond very quickly to changes in their internal and external environments.

Explanation:

Signal transduction mechanism may be defined as the pathway by which the chemical or any other signalling molecules are transmitted in the body by initiating the series of molecular events. Protein kinase play an important role in the signal transduction pathway.

The signal transduction pathway initiates quickly and shut down also quickly. This is because the body needs to be respond very quickly in the changing environment. The homeostasis of the body is maintained in the quickly changing environment by the signal transduction pathway.

Thus, the correct answer is option (D).

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;