Heterotypic Signaling Between Different Cell Types in a Tumor Often

Question

Heterotypic signaling between different cell types in a tumor often involves the activities of
A)Trophic factors favoring cell survival.
B)Growth-inhibitory signals.
C)Mitogenic growth factors.
D)A,B,and C
E)None of the above.

Accepted Answer

Heterotypic signaling between different cell types in a tumor can involve a variety of signals, including trophic factors that support cell survival, growth-inhibitory signals that limit proliferation, and mitogenic growth factors that promote cell growth and division. Therefore, choice D, which includes all three of these options, is the correct answer. Option E can be eliminated as it suggests that there are no potential signaling pathways between different cell types in tumors, which is not accurate.