Brain is protected and brain tissue is provided with nutrients and oxygen by?
Correct answer: B. Meninges
- A. Cranium
- B. Meninges
- C. Skull
- D. Ventricles
Explanation
The correct answer is Option B: Meninges. The meninges are layers of protective tissue that cover the brain and spinal cord. They consist of three layers: the dura mater, arachnoid mater, and pia mater. The pia mater is particularly rich in blood vessels, supplying nutrients and oxygen to the brain tissue. Additionally, the meninges, along with cerebrospinal fluid, provide mechanical protection to the central nervous system. Options A and C, the cranium and skull, are both bony structures that serve to protect the brain from physical damage but do not play a role in nutrient or oxygen supply. Option D, ventricles, are involved in the production and circulation of cerebrospinal fluid, which cushions the brain but is not directly responsible for nutrient delivery.
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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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