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AnS 214 Exam 2 Review. Nervous System - 10. Name the three functions of the nervous system. Nervous System – 10. Collect sensory input Integrate sensory input Produce motor outputs. Nervous System - 20. What are cell bodies called in the PNS and CNS?. Nervous System – 20. - PowerPoint PPT Presentation
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Nervous System Muscles CV Diagrams Misc.
10 10 10 10 10
20 20 20 20 20
30 30 30 30 30
40 40 40 40 40
50 50 50 50 50
Nervous System – 40
• CNS – Oligodendrocytes• PNS – Schwann cells
• Bonus question (10 points) : How many nerves are does each cell type cover?
Nervous System - 50
• Describe an EPSP from the generation of an action potential to the post synaptic neuron. Name one type of synaptic relationship that generally causes EPSPs.
Nervous System – 50
• Cell depolarizes, Na+ moves in• Reaches threshold• Generates action potential at axon hillock• Moves towards presynaptic axon terminal• Synaptic vesicles bind to axon terminal and release
neurotransmitter• Bind to receptors on postsynaptic neuron• Excite post-synaptic neuron to open chemically gated
channels• Axodendritic
Muscles - 20
• Mammalian muscles cell grow by ______________ prenatally and ______________ after birth.
Muscles - 50
• Describe the length-tension relationship and provide examples of what the sarcomere looks like at the extremes.
Muscles – 50
• The amount of tension generated depends on the muscles length before stimulation
• Overly contracted: thick filaments too close to z-disc to contract any more
• Too stretched: Very little overlap, cannot produce enough force to contract
CV – 30
• Angina• Myocardial infarction• Arrhythmia• Fibrillation• Defective Av node• Defective SA node• Premature ventricular contraction
CV – 50
• SA node – fastest depolarization• AV node – connect atria and ventricle• AV bundle/bundle of His• Right and left bundle branches – in septum, go
towards apex of heart• Purkinje fibers – ventricular walls