ANS Word Scramble
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Question | Answer |
Cell body | Contains the nucles, concerned with metabolism and function of the cell |
Dendrites | Conduct impulses toward the cell body |
Axon (nerve fibers) | Conducts nerve impulses away from the cell body |
Synaptic end bulbs | At the terminal ends of axons, they are sacs that contain synaptic vesicles |
Synaptic Vesicles | Contain neurotransmitters ie. norepi, dopamine, Ach, seritonin |
Myastenia Gravis | an autoimmune disease, the post synaptic membrane becomes distorted and cannot recieve Ach |
Lou Gehrigs disease | Disrupted dignals to muscles |
Neurotransmitters | messengers that travel from the brain cell to another,chemical signals the neurons use to talk to each other |
Myelin Sheathe | Covers axons of some of the CNS nerves and peripheral nerves, speeds up conduction and insulates the axon |
Neurolemmocytes | Sheathe covering the PNS |
Neurolemma | Outer layer of the Neurolemmocytes -Sheathe of Schwann (schwann cells)-aids in regeneration |
Nodes of Ranvier | Gaps formed between the myelin sheath- |
Saltatory conduction | Rapid rate of conduction |
Schwann cells | Produce growth factor |
Nerve growth factor | A protein that has hormone like actions-Schwann cells produce this |
Regeneration of an axon depends on.. | 1.Location of injury,2.Type of injury 3.Inflammatory response 4.Process of scarring 5.Cell body staying intact 6.Neurolemma remain active |
CNS Myelin Sheath | Made of Oligodendricyte cells-do not regenerate |
Multiple Sclerosis | The myelin sheath deteriorate and sclerose |
Tay-Sachs | Inherited neuro-degenerative disorder (fatty substances accumalate in the nerve cells) |
Guillian Barre syndrom | Due to viral infection,toxic exposure,immunizations |
CNS is comprised of | Brain and spinal cord |
Peripheral nerves are comprised of | Afferent (goes up) Efferent nerves (goes down)- Somatic NS (voluntary Autonomic (Involuntary) |
Polarized state | cell is at rest-Na+ K+ pump turned on,Na+ out,K+ in (cell is negative) |
Action Potential | Na+ moves in, Ca follows, K+ slowly moves out (cell is now positive)-causes cell to explode |
Repolarization | K+ continues to move out the cell,Na+ K+ pump turns back on,cell is then reset and back to resting potential state |
Amphetamines | increases neurotransmitter release |
SSRI Drugs | increases presence of serotonin in the synapse |
Cocaine | Blocks reuptake and keeps neuron firing |
Ganglia | A relay station between nerve cells |
Preganglionic nerve fiber | Comes into the ganglia |
Postganglionic nerve fiber | Located in the ganglia |
Junctions | Space between the nerve fiber cells and the effector cells |
Effectors | cardiac muscle smooth muscle glands Viscera |
Synapse | (small space filled with extracellular fluid) A region surrounding the point of communication between 2 neurons or a neuron and the effector organ |
All preganglionic neurons release?? | Acetylecholine |
The ANS is regulated by the ?? | Cerebral cortex,Medulla and the (Hypothalamus )(main controller) |
Somatic Nervous System | -Cell body located in CNS -axons run from CNS to skeletal muscles directly no ganglia involved |
SNS preganglionic cells bodys found in | the spinal cord from T1-L2&3 Synapses with 20 or more |
Adrenergic fibers | stimulate the adrenal gland-releases 80% Epi and 20% nor epi |
PNS preganglionic cell bodies are found in | Cranial nerves 3,7,9,10 and Sacral S2-S4 Synapses with 4-5 postganglionic cell bodies |
in the PNS the Most extensive distribution of fibers comes from | Vagus nerve (80%)of outflow |
Vagus nerve innervates with | pharnx, thorax, pelvis and abdomen |
Adrenergic neurotransmitters are | Epinephrine and norepinephrine |
cholinergic neurotransmitters are | aCh -acetylcholine |
AchE-Acetylcholinesterase function | inactivates and prevents accumalation of Ach at the effector organ |
Adrenergic Deactivators are | COMT-Catecholamethyltransferase-breaks norepi &epi MAO-MOnoamineOxidase-breaks down dopamine |
PNS-Cholinergic Receptors | Nicotonic-on post ganglionic cell body Muscuranic-on effector organ (just PNS) |
SNS-Adrenergic Receptors | Beta 1,Beta2,Alpha1,Alpha2 (on postganglionic axon) |
Agonist | -mimetic |
Antagonist | -olytic |
Created by:
rebeccabelleth
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