ReviewExam3 - 1) Nervous system - overview and neuron...

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Sheet1 Page 1 1) Nervous system - overview and neuron function - Why do animals have a nervous system? What three steps do we need to consider when looking at the nervous system? What is the CNS? PNS? What is a nerve? Ganglion? - What are the three parts of neurons, and what does each of them do? Do all neurons look alike? - What is a myelin sheath? How is it different in the PNS vs. the CNS? What do astrocytes do? - What is the main function of neurons? How is the resting potential in neurons maintained? What is the resting voltage? What ions are involved in maintaining this resting voltage? Where are they? - What three things can a stimulus do, and how does the movement of ions affect this? - What is an action potential? How is an action potential generated? Which ions are involved and which direction do they move? What voltage changes take place? Which ions cause which voltage changes? What is the role of the ion gates in all of this? What is depolarization? Hyperpolarization? - What prevents the signal from traveling backwards? How fast can the signal travel? What controls the speed of the signal? - What are synapses? What types of synapses are there, and how do they differ? - Explain how a signal can be transmitted from a pre-synaptic neuron to a post- synaptic neuron. Which chemicals are involved? What kinds of gates can be opened? What is a neurotransmitter? Why is it so important that this is broken down quickly? What happens to the voltage in the post-synaptic neuron? - How does the post-synaptic neuron figure out what to do? What types of neurotransmitters heroin do? 2) Nervous system - sensory input - what are sensory neurons designed to do? What are the 5 categories of receptors (NOT the "5 senses")? How does the sense of touch work? What kind receptors make up the sense of touch? What is the function of pain? Where do we have most of our "touch" receptors? - What are the parts of the outer ear? What is the function of these parts? What are the parts of the middle ear? What is the function of these parts? What do the eustachian tubes do? - What is the function of the inner ear? What is the cochlea? The oval window? Round? Vestibular canal? Tympanic canal? Cochlear duct? What is the function of all of these parts? What is the tectorial membrane and how does it work? What about the organ of Corti? How do
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ReviewExam3 - 1) Nervous system - overview and neuron...

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