Which fluid bathes the neurons of brain and spinal cord and provides cushions against the bumps and jolts?
Correct answer: D. Cerebrospinal fluid
- A. Blood
- B. Interstitial fluid
- C. Intercellular fluid
- D. Cerebrospinal fluid
Explanation
The correct option is D as, cerebrospinal fluid (CSF) is a clear, colourless fluid that bathes the brain and spinal cord, providing cushions against the bumps and jolts. It is produced by the choroid plexus in the brain, circulates around the brain and spinal cord, removes waste products, and provides nutrients to these structures. Interstitial and intercellular fluid protect cells from any injury. On the other hand, blood does not serve a cushioning purpose.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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