At which site do virtually all of the signals that regulate the activities in which a cell is engaged originate?
A)at the cell surface
B)in the nucleus
C)in the nucleolus
D)in the endoplasmic reticulum
E)in the cell wall

Question

Quizplus · Accepted Answer

Most signals that regulate cellular activities originate at the cell surface, where receptors bind to specific ligands and activate intracellular signaling pathways. These pathways can lead to changes in gene expression, metabolism, cell growth, differentiation, and other cellular processes. While signals can also originate from other organelles such as the nucleus or endoplasmic reticulum, they often require assistance from or interaction with cell surface receptors to have a significant impact on cellular activities.

At Which Site Do Virtually All of the Signals That