| Question |
Answer |
| Nervous System |
refers to body's electrochemical communication system |
| Neuron/Nerve Cell |
basic unit of nervous system |
| Neuroscience |
mult-disciplinary study of the nervous system(biology and etc) |
| Nervous system characteristics; complexity |
brain composed of billion of nerve cells |
| Integation |
brain coordinates & integrates information from many sources |
| Adaptability |
brain is capable of change |
| Electrochemical Transmission |
brain uses electrical & chemical communication |
| Pathways in the Nervous System/ Afferent Nerves |
recieve incomeing/senory information from the body(approach brain)(enter) |
| Efferent Nerves |
send motor commands from brain to muscles and body(exit the brain) |
| Neural Networks |
integrate sensory input & motor output |
| Central Nervous System |
brain & spinal cord (central) |
| Peripheral Nervous System (side) |
PNS carries messages to & from CNS & the organs, glands, & skeletal muscles |
| Somatic Nervous System |
carries senory information to the CNS & motor information from the CNS to skeletal muscles |
| Autonomic Nervous System |
carries info to & from CNS to body's organs & glands |
| Sympathetic |
nervous system(arousing)(sensative) |
| Parasympathetic |
calms the body |
| Neuron |
basic unit to the nervous system that serves to process info |
| Glial Cells |
provides support & nutritional benefit(feeds cells) |
| Parts of a basic cell;soma/cell body |
contains nucleus |
| Dendrite |
recieves info & channels it toward cell body |
| Axon |
carries electrical info away from cell to other cells |
| Myelin Sheath |
insulation that helps message travel faster; implicated in Multipe Sclerosis |
| Communitcation in the Cell; Resting Potential |
is the difference in voltage between the inside & outside of axon membrane; NA+ions are in high concentration outside of cell wall, while K+ions are in high concentration inside the cell |
| Resting Potential part B |
at rest, some K+ions can leave the cell causing the exterior of the nerve cell membrane to be slightly positive relative to the inside of the axon |
| Action Potiential |
NA+gates at base of neuron open; NA+ rushes into neuron, temporarily altering charges present at membrane; the charge on K+ion cause next gate to open; gates open & close sequentially down the length of the axon |
| Action Potiential part B |
when the gate closes, K+ions flow out of the neuron to re-establish resting potiential |
| All or None Principle |
when electical impulse is released, it travels down the axon at the same speed(resulting in neurotransmisson) |
Beef Production
