Podcast
Questions and Answers
Which type of neuroglia is primarily responsible for forming the myelin sheath around CNS axons?
Which type of neuroglia is primarily responsible for forming the myelin sheath around CNS axons?
What is the function of astrocytes in the central nervous system?
What is the function of astrocytes in the central nervous system?
What is the primary role of microglial cells in the nervous system?
What is the primary role of microglial cells in the nervous system?
What characteristic of the blood-brain barrier (BBB) allows selective permeability to substances?
What characteristic of the blood-brain barrier (BBB) allows selective permeability to substances?
Signup and view all the answers
Which type of neuroglia aids in the production and monitoring of cerebrospinal fluid?
Which type of neuroglia aids in the production and monitoring of cerebrospinal fluid?
Signup and view all the answers
Study Notes
Neuroglia in the Central Nervous System
- Oligodendrocytes: Wrap plasma membrane around CNS axons to form myelin.
- They do not form a neurilemma, and axon regeneration is impossible.
- Astrocytes: Provide support, stimulate neural growth, and regulate ion, nutrient, and dissolved gas concentrations.
- They influence synaptic transmission, absorb and recycle neurotransmitters, and form scar tissue at injury sites.
- They also form the blood-brain barrier (BBB).
Blood-Brain Barrier (BBB)
- Regulates exchange between blood and neurons.
- Acts as a filtering mechanism for capillaries supplying blood to the brain and spinal cord.
- A selectively permeable barrier, controlling which substances can pass through.
Microglial Cells
- Phagocytic cells that migrate through nervous tissue.
- Act as a janitorial service and police force by engulfing cellular debris, waste, and pathogens.
Ependymal Cells
- Form simple cuboidal to columnar epithelial lining of brain and spinal cord cavities.
- Assist in production and monitoring of cerebrospinal fluid (CSF).
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the essential functions and types of neuroglia in the central nervous system, including oligodendrocytes, astrocytes, microglial cells, and ependymal cells. Understand their roles in supporting neurons, forming myelin, and maintaining the blood-brain barrier. Test your knowledge on how these cells contribute to overall brain health and functionality.
