1. name this muscle 2. list 3 actions of the muscle in #1 (be specific) 3. name this muscle 4. meg...
Post on 20-Dec-2015
214 views
TRANSCRIPT
1. Name this muscle
2. List 3 actions of the muscle in #1 (be specific)
3. Name this muscle
4. Meg tore her semitendinosus muscle. What movement will be painful?
5. List one muscle that extends the knee.
Nervous tissue
• nervous system overview• NS organization • terminology• anatomy of a neuron• neuroglial cells• myelin sheath• synapse anatomy
PNS
CNS
Sensory Motor
Visceral Somatic
Sympathetic Parasympathetic
CNS = brain and SCPNS = everything else
Nervous systemdivisions
1
3
2
Peripheral NSCentral NS
Muscles
1 = sensory (afferent) neuron2 = interneuron (CNS)3 = motor (efferent) neuronSomatic Nervous System
1
3
2
Visceral Nervous System
1 = sensory neuron2 = interneuron (CNS)3 = motor neuron
Peripheral NS Central NS
Neuroglia
• CNS– Astrocytes (green)– Microglia (purple) – Oligodendrocytes (blue)– Ependymal (pink)
• PNS– Schwann– Satellite cell
• Neuroglia can undergo mitosis (for better or worse)• gliomas (ependymoma, astrocytoma, oligodendroglioma)
CNS
PNS
oligodendrocyteSchwann cell
• Schwann cell helps damaged nerve fibers grow back to target• Oligodendrocyte does not• Nerve regeneration in PNS not CNS
Postsynaptic neuron
Synaptic vesicles
Synaptic cleft
Neurotransmitterreceptor
Presynaptic neuron
Synapses
Neurotransmitters• chemical signals• excitatory or inhibitory• drugs…