Which of the Following Is a Common Means by Which

Multiple Choice

Which of the following is a common means by which binding of an extracellular chemical messenger with a cell's receptor brings about a desired intracellular response

A) opening or closing of specific channels to regulate ionic movement across the plasma membrane
B) activation of an extracellular, second messenger system
C) alteration of DNA structure by attaching to the nucleus
D) combination with surface receptor