Question

multiple choice question
a peptide hormone binds to its receptor on the cell surface. this binding activates a few second messengers, each of which goes on to activate multiple intracellular enzymes, which in turn activate many more intracellular enzymes. this is known as a(an):
response cascade
enzyme cascade
hormone cascade

Explanation:

A response cascade occurs when a hormone - receptor binding activates second messengers which then activate multiple intracellular enzymes in a sequential manner. An enzyme cascade is more focused on enzymes directly activating other enzymes without the initial hormone - second messenger step. A hormone cascade typically refers to a series of hormonal interactions. Here, the described process is a response cascade.

Answer:

response cascade