Biological Systems MCAT Practice Exam

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Prepare for the Biological Systems MCAT. Study with detailed questions and explanations. Enhance your understanding and boost your confidence for this crucial exam.

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What is the primary function of the meninges?

Transport nutrients to neurons
Protect the brain and spinal cord
Facilitate nerve signal transmission
Regulate temperature in the CNS

The correct answer is: Protect the brain and spinal cord

The primary function of the meninges is to protect the brain and spinal cord. The meninges are a three-layered protective membrane system that surrounds the central nervous system (CNS), which includes the brain and spinal cord. These layers consist of the dura mater, arachnoid mater, and pia mater, each serving to provide structural support and protection. By encasing the brain and spinal cord, the meninges help to prevent physical damage from impact or trauma. Additionally, they play a role in containing cerebrospinal fluid (CSF), which cushions the brain and spinal cord, providing further protection against mechanical injury and serving as a medium for nutrient distribution and waste removal. The other options, while related to functions of the nervous system, do not accurately describe the primary role of the meninges. Transporting nutrients to neurons is primarily the function of blood vessels and glial cells in the CNS. Facilitating nerve signal transmission is primarily managed by the neurons themselves and their synaptic interactions. Regulating temperature in the CNS involves various physiological processes and is not a direct function of the meninges. Thus, the protective role of the meninges stands out as their main function.