Dental Admissions Test (DAT) Practice Test

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What is the innermost layer of the meninges called?

  1. a. Arachnoid

  2. b. Pia Mater

  3. c. Dura Mater

  4. d. Subarachnoid

The correct answer is: b. Pia Mater

The innermost layer of the meninges is called the Pia Mater, which is the thin and delicate layer that adheres to the surface of the brain and spinal cord. The Pia Mater is surrounded by the Arachnoid and the Dura Mater layers, which are both thicker and provide more protection for the brain. The Subarachnoid space is located between the Arachnoid and the Pia Mater layers. While this layer contains cerebrospinal fluid, it is not considered part of the meninges. Therefore, options A, C, and D are all incorrect.

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