Graft-Versus-Host Rejection Occurs Only If the Transplanted Tissue Contains Viable

question 112

True/False

Graft-versus-host rejection occurs only if the transplanted tissue contains viable immune or stem cells.

---

Definitions:

Autocrine Signaling

A form of cell signaling in which a cell produces and secretes a molecule that binds to receptors on the same cell, leading to a response.

Classical Endocrine Signaling

A method of cellular signaling wherein hormones are released by glands into the bloodstream and transported to target organs or tissues to elicit specific physiological responses.

Insulin-like Growth Factor

A protein with high similarity to insulin; it plays an important role in childhood growth and continues to have anabolic effects in adults.

Second Messenger

A substance inside a cell that acts as a signal molecule in response to an external stimulus, transmitting the message initiated by the first messenger.