Topics:
Animal Physiology, Animal Refresher
Production of Cerebrospinal Fluid (CSF)
Cerebrospinal fluid (CSF) is produced by:
- Choroid plexus
- Ependymal lining of ventricles of brain
- Both a & b — Correct Answer
- Cerebellum
Explanation:
Correct Answer: Both a & b
Cerebrospinal Fluid (CSF) is produced by both the choroid plexus (primary source) and the ependymal lining of the brain ventricles (minor contribution).
Choroid Plexus
- Located in the lateral, third, and fourth ventricles of the brain.
- Highly vascularized tufts of capillaries covered by specialized epithelial cells (choroid plexus cells).
- Secretes CSF by active transport from plasma (~500 ml/day in humans).
- Forms the blood-CSF barrier.
Functions of CSF
- Mechanical protection (cushions brain and spinal cord against trauma).
- Buoyancy — brain 'floats' in CSF reducing its effective weight.
- Removal of metabolic waste from the CNS.
- Maintenance of stable ion concentrations for neural function.
CSF Circulation
Lateral ventricles → Foramina of Monro → 3rd ventricle → Aqueduct of Sylvius → 4th ventricle → Subarachnoid space → Absorbed by arachnoid villi into dural venous sinuses.
Stored By
- Cisterna chyli is the storage house of lymph — not CSF.
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
