Question

Ventricles of the brain are filled with a fluid called as

• A. Lymph
• B. Plasma
• C. Perilymph
• D. Cerebrospinal fluid

Answer 1

Answer: (D)

Cerebrospinal fluid

a) Lymph is the fluid having the same composition as tissue fluid, plasma minus large plasma proteins, but is found only in lymph vessels.

b) The liquid matrix of the blood, in which blood cells are suspended, is known as plasma. It consists of 91% water and 9% large proteins.

c) Perilymph is the extracellular fluid present in scala tympani and scala vestibule of the cochlea.

d) Cerebrospinal fluid is the clear tissue fluid which makes protective cushion around and within CNS. It is present in the central canal of spinal cord and in brain ventricles.

So, the correct answer is option D.