Term
| Functions of the Nervous System |
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Definition
1.Sensory: Gathering info on changes inside and outside.
2.Integration: Process and interpret input.
3.Motor: Response to integrated stimuli. |
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Term
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Definition
| CNS. Integation; comand center, homeostasis. Brain & spinal chord. |
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| Peripheral Nervous System |
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Definition
| Communication between CNS and everything else in the body. |
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| Subdivision of motor. Voluntary; skeletal muscle. |
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| Subdivision of motor. Involuntary; smooth & cardiac muscle and glands. |
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| Fight or Flight. Subdivision of autonomic nervous system. |
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| Rest and Digest. Subdivision of autonomic nervous system. |
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| Support, insulate, protect neurons. |
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| Star-shaped; blood brain barrier. |
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| Phagocytes; defend CNS cells. |
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| Line cavities of brain & spinal cord; cilia move cerebrospinal fluid. |
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| CNS; myelin sheath around axon, white matter. |
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Definition
| PNS; myelin sheath around axon. |
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Definition
| Nerve cell; functional unit of nervous system. Made up of body & processes. |
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| Process; away from cell body, only 1. |
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| "White" fatty covering of axon. Schwann (PNS), Oligodendrocytes (CNS). |
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Definition
| Gaps in myelin sheath on axon. |
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Definition
| Cell bodies & unmyelinated fibers. |
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| Collections of cell bodies outside of the CNS; fuse boxes. |
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Definition
| Bundle of nerve cells; CNS vs PNS. |
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Term
| Interneuron (Association) |
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Definition
| CNS; connect sensory & motor neurons. |
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Definition
| Many dendrites; most common. |
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Definition
| 1 axon & 1 dendrite; special sense organs; rare. |
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Term
| Functional Properties of Neurons |
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Definition
1.Irritability: ability to respond to stimuli.
2.Conductivity: ability to transmit an impulse. |
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Term
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Definition
| Cell membrane is polarized at rest (+ outside/- inside). Stimuli opens pores and switch this by letting Na+ in. |
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Definition
| Difference in charge across the membrane, down the axon. |
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Definition
| Switches back to polar state (resting membrane potential) by letting K+ out. |
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Definition
| Action potential "jumps" along the axon because of myelin sheath. |
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Term
| Primary Somatic Sensory Area |
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Definition
| Receives impulses from sensory receptors; parietal lobe. |
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Definition
| Sends impulses to skeletal muscles; frontal lobe. |
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| Relay station between 2nd and 3rd. |
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Definition
| Integrating link between nervous sys. & endocrine sys. |
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Definition
| Pineal gland (3rd eye); Choroid plexus. |
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Definition
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| Breathing; bulge in brain stem. |
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| Heart rate control, blood pressure, breathing, swallowing and vomiting. |
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| Present time consciousness. |
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Definition
| "Tough Mother", Meninges; outer layer, double layered external covering of brain. |
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Definition
| Meninges; internal layer, clings to the brain. |
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Definition
| CSF. Protection and nutrients to the brain. Choroid Plexus makes it, arachnoid villi absorbs it. |
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| Stroke; ischemia (lack of oxygen) of brain tissue. |
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Plexus; bundle of nerve fibers.
Neck, face & diaphragm. |
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| Shoulder, arm, forearm & hand. |
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| Protects neuron cell bodies. |
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Definition
1.Sensory receptor reacts to stimuli
2.Sensory neuron carries info to CNS
3.CNS (integration center) processes and directs motor output
4.Motor neuron carries info to effector
5.Effector organ is the muscle or gland to be stimulated |
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