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Unit 2
Nervous System
Question | Answer |
---|---|
Central Nervous System (CNS) | Receives / Processes incoming sensory informationMade up of –brain & spinal cord |
Spinal Reflexes | automatic behaviors produced from spinal cord |
Peripheral Nervous System | Controls input / output of CNS |
Somatic | nerves that help us sense the world around us |
Automatic system | blood press., sweat, heart rate… |
Sympathetic | accelerates body fx’s—mobilizes body for action (fight or flight) |
Parasympathetic | returns body to normal status. |
Neuron | Nerve Cell |
Cell body | keeps the neuron alive, decide whether or not it will fire. |
Dendrites | deliver messages to cell body from other neurons |
Axon | Transmits messages away from cell body to other neurons |
Axon Terminals | branches at the end of an axon |
Myelin Sheath | fatty covering of cells |
Glial Cells | provide nutrients for nerve cells |
Synapse | space b/t neurons |
Neurotransmitter | chemical substance that binds with dendrites to EXCITE or INHIBIT firing. |
Serotonin | affects sleep, appetite, sensory perception, pain suppression, mood |
Dopamine | affects voluntary movement, learning, memory, & emotion. |
Acetylcholine | affects muscle action, cognition, memory, emotion |
Norepinephrine | affects heart-rate (stress), learning, memory, emotion |
GABA | major inhibitor in the brain |
Endorphins | alter effects of neurotransmitters |