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Questions and Answers
What primarily constitutes white matter in the CNS?
Which of the following locations primarily contains grey matter in the CNS?
Which tract is an example of a descending tract in the CNS?
What is the primary role of microglia in the CNS?
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What is the function of ascending tracts in the CNS?
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Study Notes
CNS Structure and Function
- Microglia perform immune surveillance and phagocytosis in the CNS.
- Ependymal cells line the ventricular system and create cerebrospinal fluid.
White and Grey Matter
- White matter primarily consists of myelinated axons, giving it a white appearance due to myelin content.
- Grey matter is made up mainly of neuron cell bodies and appears grey due to the absence of myelin.
- White matter is predominantly located in the brain and spinal cord's interior, while grey matter is found on the outer layers.
Ascending and Descending Tracts
- Ascending tracts carry sensory information from the body to the brain.
- Descending tracts convey motor information from the brain to the body.
- Examples of ascending tracts include the spinothalamic tract (for pain and temperature perception) and the dorsal column-medial lemniscal tract (for touch and vibration perception).
- Examples of descending tracts include the corticospinal tract (for motor control) and the vestibulospinal tract (for balance and posture).
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Description
Test your understanding of the central nervous system's structure and function. This quiz covers topics including microglia, ependymal cells, white and grey matter, and the ascending and descending tracts of the nervous system. Challenge yourself with questions related to the essential components and processes of the CNS.
