The Biology Project > Cell Biology > Cell Signaling > Problem Set

Cell Signaling Problem Set

Problem 3: Signal Responses II

Tutorial to help answer the question

Which of the following is NOT a typical event associated with cell signaling?

A.	Activation of G-proteins by exchanging GTP for GDP
B.	Production of the second messengers cAMP and IP3
C.	Activation of protein kinases
D.	Release of calcium ions from cell membranes
E.	Stimulation of apoptosis

Tutorial

Cell responses to external signaling

Typical responses of cells to external signals include activation of G-proteins, production of second messengers, activation of protein kinases, and the release of calcium ions from membranes. Calcium ions are considered to be second messengers. A cell response to external signals may include apoptosis, but this is not considered to be a typical response.

The Biology Project > Cell Biology > Cell Signaling > Problem Set