What are the functions of these brain parts? Q7): a) Describe the production of

Question

What are the functions of these brain parts? Q7): a) Describe the production of the Cerobrospinal Fluid (CSF) in humans. Of what special use is the CSF? Descibe the composition of the CSF Q8): Write short notes on: a) The blood supply to the Brain b) The Circle of Willis in the brain, and the consequences if ruptured of traumatized c) Name the Cranial nerves. What are the characteristics of the Cranial nerves. Name the Cranial nerves that have: i) Sensory function ii) Somatic motor function iii) Somatic motor 8 Sensory functions parasympathetic functions & Parasympathetic iv) Somatic motor & v) Somatic motor, Sensory functions

Explanation / Answer

1. Cerebrospinal fluid is a colourless fluid present in the brain and spinal cord.

2. It is produced by choroid plexus of the ventricles.

3.CSF provides mechanical and immunological protection to the brain. Other functions are maintaining homeostasis, prevention of ischemia, waste removal.

4. CSF also helps in cerebral autoregulation and cerebral blood flow.

5. CSF is composed of PROTEIN FREE blood plasma. It has higher CHLORIDE and EQUIVALENT SODIUM as compared to plasma.

6. It also contains water, glucose, potassium and calcium.

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