Divisions of the nervous system Flashcards
1
Q
What does the CNS control
A
- brain
- spinal cord
2
Q
what does the PNS control
A
- cranial nerves
- spinal nerves
- autonomics
3
Q
what does the ENS control
A
- enteric control
- GIT
4
Q
what are the arrows pointing to
A
Blue: nerons (nerve cells) = functional units of the nervous system
Red: neuroglia (glial cells) =
- supporting cells
- outnumber neurons 10:1
5
Q
what are the 3 most important neuroglial cells
A
- oligodendrocytes (insulators in the CNS)
- Schwann cells (insulators in the PNS)
- ependymal cells (make CSF and form blood-CSF
6
Q
what are the 3 types of neuronal junctions
A
- synapses (neuron to neuron, excitatory or inhibitory, only in grey matter)
- neuromuscular junctions (neurone to muscle, always excitatory)
- neuroglandular junctions (neuron-glandular cells, most secretory glands)
7
Q
what is afferent nerve
A
convey information towards the CNS
8
Q
what is efferent nerve
A
Convey information away from the CNS
9
Q
what are the 3 different types of neurons
A
- unipolar (afferent)
- bipolar (afferent)
- multipolar (efferent)
10
Q
what is the peripheral nervous system
A
- nerves outside the protection of the skull and spine
- includes motor, sensory and autonomic sections
- includes cranial nerves except optic nerve (II)
- segmental (even the cranial nerves)
11
Q
what is the autonomic nervous systm
A
- part of the PNS supplying efferent (motor) fibres to visceral structures
- control intrinsic rhythms
- sympathetic and parasympathetic
- control centres of the CNS
12
Q
what response is controlled by the sympathetic nervous system
A
fight or flight response
13
Q
what is something that is causd by the parasympathetic nerous system
A
urination and defecation on comand
