Question

What is pH of cerebrospinal fluid?
A. $1.23$
B. $6.82$
C. $7.00$
D. $7.33$

Answer 1

Cerebrospinal fluid is the clear fluid which surrounds the brain and spinal cord. It saves the brain and spinal cord from the injury and helps in the nutrient delivery. It also removes waste from the brain and spinal cord. This pH level of cerebrospinal fluid is playing an important role in regulation of respiration. It is in equilibrium with the brain and interstitial fluid.

Complete answer:
Option D: Cerebrospinal fluid pH rate is nearly to the $7.33$. It may vary from person to person. But the varying level is nearly $0.011$ units from the persons.
So option D is the correct answer.
Option A: Lower level of cerebrospinal fluid pH may cause the headache. Because of internal spinal fluid leakage will occur.
So option A is not the correct answer.
Option B: Normal range of cerebrospinal fluid pH is $7.33$ to $7.523$ so $6.82$ is not the correct one.
So option B is not the correct answer.
Option C: The pH level $7$ is not the correct answer. It is less than that of the normal value.
So option C is not the correct answer.

Note:
Cerebrospinal pH level is regulated by the combination of ion secretions. The exchange process occurs at the choroid plexus and blood brain barrier. This cerebrospinal fluid slightly consists of acid. This CSF is equilibrium with venous than arterial plasma. CSF consists of alkaline and contains ninety nine percent of water.