Signaling factors that complete cell-to-cell communication in the form of direct contact are called
A)juxtacrine factors.
B)paracrine factors.
C)endocrine factors.
D)autocrine factors.

Question

Quizplus · Accepted Answer

Juxtacrine factors are signaling factors that complete cell-to-cell communication in the form of direct contact. This involves physical contact between the signaling cell and the target cell, which allows for specific and localized signaling. Examples of juxtacrine signaling include the interaction between T cells and antigen-presenting cells, as well as the signaling between adjacent cells during development and tissue maintenance. Paracrine factors are signaling molecules that diffuse through the extracellular space to act on nearby cells, while endocrine factors are secreted into the bloodstream to act on distant target cells. Autocrine factors are signaling molecules that act on the same cell that secretes them.

Signaling Factors That Complete Cell-To-Cell Communication in the Form of Direct