Final answer:
Astrocytes are the neuroglial cells that play a crucial role in forming the blood-brain barrier, maintaining the CNS environment and protecting the brain from toxic substances. Option d.
Step-by-step explanation:
The neuroglial cell that helps form the blood-brain barrier is the astrocyte. Astrocytes interact closely with the blood vessels of the brain, controlling the transmission of materials from the bloodstream into the brain and maintaining the delicate environment necessary for neuronal function. These cells are fundamental in regulating the concentrations of ions and chemicals in the extracellular fluid, providing structural support, and protecting the central nervous system (CNS) from potentially harmful substances.
The neuroglial cell that helps form the blood-brain barrier is the astrocyte. Astrocytes are a type of glial cell found in the central nervous system. They provide nutrients to neurons, maintain their extracellular environment, and provide structural support. Additionally, astrocytes play a crucial role in regulating the blood-brain barrier, which is a structure that blocks the entrance of toxic substances into the brain.