Question

Macrophages are an important part of the immune system. A macrophage released signaling molecules that bound to receptors on the macrophage’s surface. This interaction activated the macrophage further and caused it to produce proteins that regulate immune responses. What type of cell communication was involved in the scenario? Explain your answer.

a) Endocrine signaling
b) Paracrine signaling
c) Autocrine signaling
d) Neuronal signaling

Answer 1

The cell communication described in the scenario is autocrine signaling, where a macrophage enhances its response by responding to its own signaling molecules.

Step-by-step explanation:

The type of cell communication involved in the scenario where a macrophage releases signaling molecules that bind to receptors on its own surface is known as autocrine signaling. This is a specific form of cell communication where a cell targets itself, responding to signaling molecules it produces. Autocrine signaling is important for several functions, including regulating pain, inflammatory responses, and the development of tissues. In the context of the immune system, autocrine signaling can enhance a macrophage's ability to deal with pathogens and can signal the cell to undergo programmed cell death if infected by a virus.

Answer 2

Autocrine signaling is involved in the scenario, where a macrophage responds to its own signaling molecule and activates itself further to regulate immune responses.

Step-by-step explanation:

The type of cell communication involved in the scenario is autocrine signaling. Autocrine signaling occurs when a cell responds to its own signaling molecule. In this scenario, the macrophage released signaling molecules that bound to receptors on its own surface, activating the macrophage further and causing it to produce proteins that regulate immune responses.