Question

Which of the following is TRUE of intercellular communication within a human body? (select ALL that apply)

	a.	All necessary communication is achieved using HORMONES.
	b.	It is important for coordinating homeostasis in a multicellular body.
	c.	It often involves the use of chemical signaling between cells.
	d.	It is important for coordinating growth of a multicellular body.
	e.	It only is needed between cells that are distantly separated within the body.

Answer 1

B, C, D

First option is incorrect because necessary communication in cell does not involve only hormone, any other type of molecule like antigen, any other ligand or protein molecule can elicit cell signalling response.

Second option is correct because homeostasis is a complex process of maintenance of constant internal environment. And this complex process is associated with the interaction of many different Pathways of cell signalling.

Third option is correct because cell signalling can either take place through chemical signaling or electrical signaling. Chemical signaling is the predominant form of cell signalling and electrical signaling occurs in muscles and neurons.

Fourth option is correct because the overall growth of the body is dependent upon the interaction between different types of Pathways of cell signalling.

Last option is incorrect because autocrine signalling is associated with the signaling of the cell which itself releases the ligand. And in paracrine signaling, the cells are not distantly separated from each other.

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