Nervous Tissue
Does this show a
neuron, nerve, or
nerve fiber?
Nervous Tissue
Nerve: collection of axons
in the PNS
Nerve fiber: long axon
Neuron: nerve cell
Important topics:
1.
2.
3.
4.
5.
Organization of the nervous system
Neuron and synapse anatomy
Structural classes of neurons
Six types of neuroglia
The spinal cord
Practicing organization
Place the following levels into a flow chart:
• Autonomic nervous system
• Central Nervous System
• Fight or flight responses (Incr. HR)
• Involuntary / visceral motor control
• Motor / efferent division
• Parasympathetic nervous system
• Peripheral Nervous System
• Rest responses (Incr. digestion)
• Sensory / Afferent division
• Somatic nervous system
• Somatic sensory fiber
• Sympathetic nervous system
• Visceral sensory fiber
• Voluntary motor control
Practicing Organization
CNS
PNS
Somatic
sensory
Motor / Efferent division
Visceral
sensory
Sensory /
Afferent Division
Somatic NS
Autonomic NS
Voluntary control
Involuntary control
Sympathetic NS Parasympathetic NS
Fight or flight,
Incr HR
Rest, Incr
digestion
Neuron and synapse anatomy
Neuron and synapse anatomy
What is a neural process?
A. Downstream of the cell body
B. Anything extending from cell body
C. Dendrites longer than the axon
What are neurofibrils?
A. Collections of neurons
B. Collections of axons
C. Collections of intermediate fibers
Which are more common on a neuron?
A. Dendrites
B. Axons
Where are mitochondria found in a neuron?
A. Cell bodies only
B. Cell bodies and terminal boutons
C. Terminal boutons only
Structural classes of neurons
Study the following table
Integrate!
A touch receptor sends a signal from the skin to the
brain.
1. What structural type of neuron is this?
2. Is the neuron in the CNS or PNS? What division?
An interneuron is found in the spinal cord, and sends a
signal to a motor neuron.
3. What structural type of neuron is this?
4. What is released from vesicles at the presynaptic membrane?
5. Is the interneuron CNS or PNS? What division?
Neuroglia
Match the neuron support cell to its function
Neuroglia
Function
Astrocytes
Microglial cells
Ependymal cells
Oligodendrocytes
Satellite cells
Schwann cells
Produce myelin in PNS
Regulate neuronal environment in CNS
Immune cells of CNS
Surround cell bodies in PNS
Produce myelin in CNS
Form a simple epithelium in CNS
The Spinal Cord
1. Which is the
sensory fiber?
2. Which is the
efferent fiber?
3. Where are the cell
bodies in the
spinal cord?
4. Where is the
myelinated axon
fiber tracts?
5. Where are the
ganglia?