Histology, Brain, Spinal Cord, Cranial Nerves Quiz Flashcards
Cranial and spinal nerves are part of CNS or PNS?
PNS
Where are sensory neurons located?
PNS
Function of sensory neurons?
Detect changes, sensations or stimuli and relay info to interneurons in CNS
Where are interneurons? What are its function?
- In spinal cord and brain (CNS)
- Interpret info and decide how body should react (sends to motor neurons)
Motor Neurons functions?
- Transmit info from interneurons to:
1) glands
2) organs
3) muscles
For a response.
Location of Neuron?
Function?
- CNS/PNS
- Initiate, transmit, and receive nerve impulse
Location of Schwann Cell (Neurolemmocyte)?
Function?
- PNS
- Insulates and speeds up electrical activity
Oligodendrocyte location?
Function?
- CNS
- Produces myelin - Insulates and speeds up electrical activity
Astrocyte location?
Function?
- CNS
1) Feeds neurons
2) Replaces DAMAGED neurons
3) Forms blood-brain barrier (BBB)
Microglial Cell location?
Function?
- CNS
1) Pathogen defense
2) Removes debris, dead/dying cells
Ependymal cell location?
Function?
-CNS
Makes and moves cerebral spinal fluid
What are functions of meninges?
1) Protective barrier for brain
2) Protects blood vessels
3) Contains/Circulates CSF
What is meningitis? What causes it?
Inflammation of meninges caused by bacterial infetion
What is mixed nerve?
Mixed nerves carries motor, sensory, and autonomic signals between spinal cord and body
What cranial nerves are not mixed?
Abducens Acessory Hypoglossal Olfactory Optic Trochlear Vestibular-cochlear
What is the corpus callosum?
- Nerve fibers (made of white matter) that divides right and left hemisphere
- Allows communication
What is contained within ventricles and subarachnoid space
Cerebrospinal fluid
Which nerves have dorsal and ventral roots?
Spinal nerves
Dorsal Roots
- AFFERENT sensory root brings SENSORY INFO from body –> spinal cord/brain
Ventral Roots
EFFERENT motor axons brings MOTOR INFO from brain to body
