Question

What is the primary function of Tumor Necrosis Factor (TNF)?

A. Promotion of cell growth
B. Enhancement of muscle contraction
C. Stimulation of cell division
D. Regulation of immune responses
E. Regulation of blood glucose levels

Answer 1

Tumor Necrosis Factor (TNF) is a protein hormone and growth factor that regulates immune responses.

Step-by-step explanation:

Tumor Necrosis Factor (TNF) plays a primary role in the regulation of immune responses. It is a protein hormone and growth factor that mediates inflammatory responses and is involved in various functions such as promoting the production of lymphocytes, stimulating the differentiation of erythrocyte lineage, and enhancing the pathogen-killing functions of macrophages and NK cells. TNF is not involved in the promotion of cell growth, muscle contraction, stimulation of cell division, or regulation of blood glucose levels.

Answer 2

d) Regulation of immune responses

Step-by-step explanation:

The primary role of TNF is in the regulation of immune cells. TNF, as an endogenous pyrogen, is able to induce fever, apoptotic cell death, cachexia, and inflammation, inhibit tumorigenesis and viral replication, and respond to sepsis via IL-1 and IL-6-producing cells.