Question

cells that support glial cells.
cells that release neurotransmitters from their soma.
part of the endocrine system.
cells that form the nervous system.

Explanation:

• "cells that support glial cells" is incorrect because glial cells support neurons, not the other way around.
• "cells that release neurotransmitters from their soma" is incorrect; neurons release neurotransmitters from axon terminals, not the soma (cell body).
• "part of the endocrine system" is incorrect; neurons are part of the nervous system, while the endocrine system involves glands and hormones.
• "cells that form the nervous system" is correct because neurons (along with glial cells) are the primary cells that make up the nervous system, responsible for transmitting electrical and chemical signals.

Answer:

cells that form the nervous system.