Somatic Nervous System Flashcards
Arrangement of the central nervous system
Spinal cord and brain
What is the afferent nervous system?
- Towards central from peripheral
- Sensory
- Sensation taken from areas such as the skin, processed by the CNS, elicits a reaction from the efferent
What is the efferent nervous system?
- Towards peripheral from central
- Stimuli from the brain initiate movement of muscles
- Neuromuscular junctions
What is the somatic nervous system?
- Skin and skeletal muscles
- Voluntary control
What is the autonomic nervous system?
- Sympathetic, parasympathetic, enteric
- Internal
- Regulating pH, temperature, breathing etc…
- Smooth muscle, Cardiac muscle, glands
What are nerve cells made up of?
Cell body, many dendrites, one axon, many synapses
What are the types of nerve cells and where are they found?
Multipolar - motor/efferent
Bipolar - relay/special sense
Pseudo-unipolar - sensory
Name 5 types of glial cells
Ependymal, astrocytes, microglia, oligodendrocytes, schwann cells
What are ependymal cells?
Involved in making CSF
What are astrocytes?
contribute to blood- brain barrier
What are microglia?
immune function
What are oligodendrocytes
Myelin sheaths around neurons in CNS
What are schwann cells
Myelin sheaths around neurons in
PNS
What is myelination
Lipid sheath surrounding the axon of a neuron, increases the speed of conduction and providing protection and structural support
What creates myelin?
Oligodendrocytes(CNS), Schwann cells(PNS)
