Some cell signaling pathways, such as the toll-like receptors (TLRs), are expressed in all cell types. Most signaling pathways have "cross points" that allow them to modulate each other.

Question

Quizplus · Accepted Answer

The first sentence is false because toll-like receptors (TLRs) are not expressed in all cell types; they are primarily found in immune cells. The second sentence is true as signaling pathways often have intersections or "cross points" where they can influence each other, allowing for complex regulation and integration of cellular responses.

Some Cell Signaling Pathways, Such as the Toll-Like Receptors (TLRs)