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Test 1-
( Body water and Nervous System)
50
Veterinary Medicine
Undergraduate 3
09/18/2012

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Cards

Term
ECF ( Extracellular Fluid )
Definition
Fluid around, between, and outside cells. Makes up 1/3 or 20% of the body weight. Contains 2 components: 16% plasma and 4% interstitial fluid. Major cation is Na.
Term
Majority of body water is extracellular?
Definition
FALSE
Term
ICF ( Intracellular Fluid)
Definition
Fluid inside cells. Makes up 2/3 or 40% of the body weight. Major cation is K.
Term
Interstitial Water
Definition
Makes up 1/4 Body Weight
Term
Total body water ( TBW)
Definition
60% of body weight
Term
Simple Diffusion
Definition
Does NOT require a carrier
Term
Facilitated Diffusion
Definition
requires a carrier protein
Term
Active Transport
Definition
requires energy
Term
Osmosis
Definition
spontaneous net movement of water through a semi-permeable membrane. Area of high concentration to an area of low concentration
Term
Osmotic Pressure
Definition
pressure in a fluid due to # of dissolved particles
Term
Electrolytes
Definition
most abundant solute molecules and play a principal role in governing body water distribution and content
Term
300 mOs
Definition
standard osmalarity
Term
Hypotonic
Definition
Less than 300 mOs, cell swells and could rupture, water drawn to higher osmotic pressure
Term
Isotonic
Definition
Equilibrium, no net water movement
Term
Hypertonic
Definition
More than 300 mOs, crenation (or cell shrinkage ) occurs
Term
8 Microns
Definition
Red blood cell
Term
Rate of Dehydration that can cause death
Definition
10-12 %
Term
2 parts of nervous system
Definition
CNS ( central nervous system ) and PNS ( peripheral nervous system )
Term
CNS ( central nervous system )
Definition
Contains brain and spinal cord
Term
PNS ( peripheral nervous system )
Definition
Nerve exits spinal cord
Term
Dendrites
Definition
Receive Signal
Term
Soma
Definition
Nerve cell body
Term
Sensory/Afferent Neuron
Definition
towards CNS
Term
Motor/ Efferent Neuron
Definition
away from CNS
Term
interneuron
Definition
directly connects sensory and motor neurons ( REFLEXES )
Term
Depolarization
Definition
membrane potential becomes less negative
Term
Repolarization
Definition
membrane potential returns to resting value
Term
Hyperpolarization
Definition
membrane potential becomes more negative than resting value
Term
Threshold
Definition
minimum intensity of a stimulation that will cause action potential
Term
Absolute Refractory Period
Definition
cell incapable of generating a new action potential with addition of a second stimulus
Term
Relative Refractory Period
Definition
More difficult to generate new action potential with addition of second stimulus
Term
Glial Cells
Definition
More abundant than neurons, 90 % of cells in the human brain. Do not generate or conduct action potential , Dont form synapses, several types of cells
Term
Chemical Synapse
Definition
predominant type of synapse that occurs in the body
Term
Electrical Synapse
Definition
gap junctions through which ions freely follow, travel very fast, occur quickly with coordination. Occurs in the cardiac cells
Term
Synapse
Definition
Presynaptic cell, post synaptic cells, synaptic cleft
Term
Synaptic Cleft
Definition
space between presynaptic and post synaptic cell
Term
Postsynaptic cell/ Post Ganglionic
Definition
may be a neuron, muscle cell, or endocrine cell.
Term
Presynaptic Cell/ Pre Ganglionic
Definition
Makes and releases chemical near axon terminal
Term
Neuromuscular Junction
Definition
Synapse between a motor neuron and a skeletal muscle cell
Term
Acetylcholine
Definition
Predominant Neurotransmitter, found in skeletal muscles, CNS, and autonomic neurons. Excitatory effect
Term
GABA
Definition
Gaba amino butyric acid, located in the CNS, Inhibitory effect
Term
Dopamine
Definition
Located in CNS, can be excitatory or inhibitory, related to parkinsons
Term
Norepinephrine
Definition
Released from adrenal glands (adrenaline ) , located in CNS, PNS, cardiac and smooth muscle, can be excitatory or inhibitory
Term
Epinephrine
Definition
located in CNS, cardiac and smooth muscle, mainly excitatory
Term
Serotonin
Definition
located in CNS, antidepressant ( zoloft ) , reuptake inhibitors- prevents serotonin from being reabsorbed
Term
Sympathetic Motor System
Definition
Fight or Flight, Neurotransmitter- nonadrenaline, Adrenergic System
Term
Parasympathetic Motor System
Definition
Relaxing responses ( normal ), Neurotransmitter- acetylcholine, cholinergic system
Term
Nerve root origin of Sympathetic Neurons
Definition
Thoracolumbar
Term
Nerve root origin of parasympathetic neuron
Definition
Craniosacral
Term
Ganglion
Definition
Cluster of nerve cell bodies outside CNS
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