The outermost of the three cranial meninges is:
Correct answer: C. Dura mater
- A. Arachnoid mater
- B. Pia mater
- C. Dura mater
- D. Sclera
Explanation
The outermost of the three cranial meninges is the dura mater. It is a thick, tough membrane that surrounds the brain and spinal cord. The dura mater is composed of two layers: the meningeal layer, which is in contact with the brain, and the periosteal layer, which is attached to the inside of the skull. The dura mater helps to protect the brain and spinal cord from injury, and it also helps to regulate the flow of cerebrospinal fluid.
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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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