To examine: Whether the statement "most intracellular signaling pathways provide numerous opportunities for amplifying the responses to extracellular signals" is true or false

It is important for the cell to be able to terminate responses, and diminish responsiveness to prevent overstimulation.  Cells have different mechanisms for this. One such mechanism is receptor down regulation. a.) Down regulation describes a decrease in the availability of hormones or neurotransmitters that bind to receptors on the surface of target cells, making the cells less likely to be stimulated.   b.) Down regulation describes glycosylation of receptor proteins receptors on the surface of target cells in order to decrease the selectivity of ligand binding, making the cells less sensitive to a hormone or neurotransmitter.   c.) Down regulation describes a decrease in the number of receptors on the surface of target cells, making the cells less sensitive to a hormone or neurotransmitter.

Cell signaling involves only one molecule, the receptor. True False

Describe the best known pathway for activation of protein kinase C.