Question

neurons and neuroglia work together to form nervous tissue, which is part of the nervous system. which describes neurons and neuroglia?

• they are specialized organs that form an organ system.
• they are organs that form tissue.
• they are specialized tissues that form an organ system.
• they are cells that form tissue.

Explanation:

To solve this, we recall the biological organization levels: cells → tissues → organs → organ systems. Neurons (nerve cells) and neuroglia (glial cells) are types of cells. Tissues are made of cells working together. Let's analyze each option:

• Option 1: Organs are made of tissues, not cells forming an organ system directly. Neurons/neuroglia are cells, not organs. Eliminate.
• Option 2: Organs are higher level than cells; neurons/neuroglia are cells, not organs. Eliminate.
• Option 3: Tissues are made of cells, not tissues forming an organ system in this context. Neurons/neuroglia are cells, not tissues. Eliminate.
• Option 4: Neurons and neuroglia are cells. When similar cells (and their associated cells) work together, they form tissue (nervous tissue here). This matches.

Answer:

D. They are cells that form tissue. (Assuming the last option is D; if the options were labeled as, e.g., A - D, the correct one is the last option stating they are cells that form tissue.)