What are the different types of external signals that can activate a cell's signal transduction pathway?

Question

Quizplus · Accepted Answer

All of these options can act as external signals to activate a cell's signal transduction pathway. Nerve stimulation can cause the release of neurotransmitters, which can activate signaling cascades. Hormones, such as adrenaline or insulin, can also bind to receptors on the cell surface and initiate signal transduction. Pollutants can disrupt normal cellular processes and cause cellular stress, which can activate signaling pathways. Steroids can enter the cell and bind to intracellular receptors, which can then initiate signal transduction.

What Are the Different Types of External Signals That Can