Splh 620 exam 1 stuvia Study guides, Class notes & Summaries

what is the nervous system? - Answer it is a system containing a network of neurons and it controls body functions what is the CNS? - Answer central nervous system - made up of brain and spinal cord, what is the PNS? - Answer peripheral nervous system - sagittal plane - Answer divides brain into right and left coronal plane (frontal) - Answer divides brain into anterior and posterior axial (transverse) - Answer divides brain into upper and lower what are the 2 basic cell types ...

cell body (soma) - ANSWER-integrates signal Dendrites - ANSWER-a neuron's extensions that receive messages and conduct impulses toward the cell body Axon - ANSWER-the part of the neuron that carries information away from the cell body toward other cells

Descartes came up with ____________. Based on ______________. - Answer first modern model of nervous system; hydraulics What was Descartes thinking behind hydraulics model of nervous system? - Answer The water would move to a joint and the water would move that joint and then the water would leave returning the joint back to its resting position. He believed that the brain thought about where the water should go and then it would go there. To him the spinal cord was just a tube, not a central...

3 types of neuroglia - ANSWER-astrocytes, oligodendrocytes, microglia Astrocytes CNS - ANSWER-Clean up local debris including dead neurons Provide nutrients Regulate chemical composition of extracellular fluid Oligodendrocytes CNS - ANSWER-Provide support for axons Produce myelin sheath to cover axons (on neuron) in CNS, covering multiple at a time Schwann Cells PNS - ANSWER-Support cells Produce myelin to cover axons (on neuron) in PNS, only covers one axon at a time Each cell pro...

What was Descartes thinking behind hydraulics model of nervous system? - ANSWER-The water would move to a joint and the water would move that joint and then the water would leave returning the joint back to its resting position. He believed that the brain thought about where the water should go and then it would go there. To him the spinal cord was just a tube, not a central player in the movements. Descartes model caused three things to occur: - ANSWER-1. firmly separated mind and body, allo...

what is the PNS? - ANSWER-peripheral nervous system - sagittal plane - ANSWER-divides brain into right and left coronal plane (frontal) - ANSWER-divides brain into anterior and posterior axial (transverse) - ANSWER-divides brain into upper and lower what are the 2 basic cell types in the CNS? - ANSWER-neurons (information carriers) and glia (support cells) what do neuroglia do in general? - ANSWER-provide physical support, nutrient flow, and nerve "housekeeping" what are the ...

Schwann Cells PNS - ANSWER-Support cells Produce myelin to cover axons (on neuron) in PNS, only covers one axon at a time Each cell provides myelin for one neuron What is exocytosis? - ANSWER-presynaptic process - when the synaptic vesicles are released and fuse to membrane Depolarization - ANSWER-Becomes more positive leading to action potential -70 to -55 Hyperpolarization - ANSWER-membrane potential becomes more negative, less likely for action potential -120 Spatial summation -...

What does the nervous system do? - ANSWER-1. controls and coordinates all body functions 2. senses and interprets information from outside the body 3. transmits info 4. integrate info 5. generate comands Parts of a neuron - ANSWER--cell body -dendrite -axon Cell body (soma) - ANSWER-integrates signal Dendrites - ANSWER-a neuron's bushy, branching extensions that receive messages and conduct impulses toward the cell body Axons - ANSWER-a part of a neuron that carries impulses a...

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What does the nervous system do? - ANSWER-1. controls and coordinates all body functions 2. senses and interprets information from outside the body 3. transmits info 4. integrate info 5. generate comands Parts of a neuron - ANSWER--cell body -dendrite -axon Cell body (soma) - ANSWER-integrates signal Dendrites - ANSWER-a neuron's bushy, branching extensions that receive messages and conduct impulses toward the cell body Axons - ANSWER-a part of a neuron that carries impulses a...