Question

Which of the following statements is true?

a.Because endocrine signals are broadcast throughout the body, all cells will respond to the hormonal signal.
b.The regulation of inflammatory responses at the site of an infection is an example of paracrine signaling.
c.Paracrine signaling involves the secretion of signals into the bloodstream for distribution throughout the organism.
d.The axons of neurons typically signal target cells using membrane-bound signaling molecules that act on receptors in the target cells.

Answer 1

Answer: b.

Step-by-step explanation:

Paracrine signalling is a type of cell-to-cell or cell signalling communication in which a cell produces a signal that causes changes in neighbouring cells, altering those cells' behaviour. One example of paracrine signalling is the transfer of signals between nerve cells through synapses.

Paracrine signalling functions are essential to amplifying and regulating an inflammatory response within a organ or tissue, and initiating a coordinated immune response involving different types of cells.

Hence, the correct option is b.

Answer 2

The regulation of inflammatory responses at the site of infection is an example of paracrine signaling.

Step-by-step explanation:

Paracrine signaling is a type of signaling where the cell communicates with their neighbor cells through the secretion of the signaling molecules. These signals move by the process of diffusion through the extracellular matrix.

Paracrine signaling helps in many biological activities in the body such as blood clotting, tissue repair, and reaction against allergens. Transfer of signals across a junction between two nerve cells is an example of practice signaling.