Which statement regarding the brain is true?
A) Ventricles in the brain are filled with interstitial fluid.
B) The blood-brain barrier helps to maintain a stable chemical environment for the brain.
C) Layers of connective tissue, called epithelium, surround and protect the brain and spinal cord.
D) White matter is composed of mainly dendrites.

Question

Quizplus · Accepted Answer

The blood-brain barrier is a specialized system of tiny blood vessels that helps to maintain a stable chemical environment for the brain by preventing certain substances from entering the brain tissue.

Answer: A
 Ventricles in the brain are fluid-filled spaces that contain cerebrospinal fluid (CSF), which provides nutrients and cushions the brain.

Answer: C
 Layers of connective tissue called meninges surround and protect the brain and spinal cord, not epithelium. The meninges include the dura mater, arachnoid mater, and pia mater.

Answer: None of the above 
 White matter is not composed of mainly dendrites; instead, it is primarily composed of myelinated axons.

Which Statement Regarding the Brain Is True