Question

The cerebrospinal fluid (CSF) is an alkaline fluid with a specific gravity of ____.

• A. \(1.0\)
• B. \(1.005\)
• C. \(1.05\)
• D. \(1.5\)

Hint:

CSF is mostly water, so its specific gravity is just above 1.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept
Cerebrospinal fluid fills the brain ventricles, the central canal and the space around the brain. It is a clear and slightly alkaline fluid.

Step 2: Recall the value
CSF is mostly water with very few proteins and cells, so it is only slightly denser than water. Its specific gravity is about 1.005.

Step 3: Why the other values fail
A specific gravity of 1.05 or 1.5 would mean a much denser fluid, which CSF is not.

Final Answer:
The specific gravity of CSF is 1.005. \[ \boxed{\text{(B) }1.005} \]