Question

Which protein serves as a chemical messenger?

1) hemoglobin
2) actin
3) myosin
4) insulin

Answer 1

Out of the choices given, the protein that serves as a chemical messenger is insulin. The correct answer is 4. Insulin spreads the information throughout the body. 

Answer 2

The answer would be:

D. Insulin

Insulin is a chemical messenger that is responsible for the regulation of blood glucose levels. It is manufactured in the pancreas and secreted by the beta cells as a response to glucose. When glucose levels in blood plasma increase, insulin is secreted to stimulate glucose uptake.