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Study sets matching "conduction signal"

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Study sets matching "conduction signal"

5 terms
signal conduction
signal conduction
Conduction speed depends on? (2)
Unmyelinated fibers
myelinated fibers
APs = Self-propagating (one produces next)... Nerve signal trave…
Diameter of nerve fiber (bigger= Better)... Presence/absence of…
1 mph (fiber passes it to the next and so on)
- ions can't flow in/out where there's myelin (insulation)... -…
signal conduction
APs = Self-propagating (one produces next)... Nerve signal trave…
Conduction speed depends on? (2)
Diameter of nerve fiber (bigger= Better)... Presence/absence of…
64 terms
Signal Conduction Along Nerves
electrical current
where does graded response occur
how is a graded response produced
are graded responses long or short lived
information is carried by nerves in this form
sensory receptor endings and dendrites
a stimulus
short, local changes in RMP
electrical current
information is carried by nerves in this form
where does graded response occur
sensory receptor endings and dendrites
26 terms
Signal Conduction Along Nerves
information is carried by nerves in th…
Two forms of electrical signals
Graded Response
Action potential
an electrical current
-graded response... -action potential
-occurs at sensory receptor endings and dendrites on unipolar…
-doesn't occur without graded response... - generated by excitab…
information is carried by nerves in th…
an electrical current
Two forms of electrical signals
-graded response... -action potential
20 terms
Origin and conduction of contraction signal
ion channels of nodal cell (SA and AV)
Slow AP
Effect of funny channel and absence of…
Pacemaker action potential
L type Ca, T-type Ca, Kv, KAch (NO Kir or Nav)
only 3 phases... RMP at -70, more positive than fast AP of ventr…
limit repolarization
ion channels of nodal cell (SA and AV)
L type Ca, T-type Ca, Kv, KAch (NO Kir or Nav)
Slow AP
only 3 phases... RMP at -70, more positive than fast AP of ventr…
54 terms
Signal Conduction Along Nerves
2 Forms of Electrical Signals
Graded Response
Graded Response Mechanism
Action Potentail
1. Graded response ... 2. Action potentail
Occur at sensory receptor endings and dendrites ... -short lived…
1. Small region of membrane becomes polarized ... 2. At point of…
Generated by excitable tissue (nerves, muscle cells)... -change…
2 Forms of Electrical Signals
1. Graded response ... 2. Action potentail
Graded Response
Occur at sensory receptor endings and dendrites ... -short lived…
20 terms
Signal Conduction Along Nerves
Continuous Conduction
Speed of Nerve Impulses
Axon Diameter
Myelination
- propagation of nonmyelinated axons... - Nerve impulse will mov…
FASTER ----> skeletal muscle... SLOWER ----> gut, glands... determi…
- Larger diameter---> less resistance to flow of ions---> mem…
More myelin = faster nerve impulses
Continuous Conduction
- propagation of nonmyelinated axons... - Nerve impulse will mov…
Speed of Nerve Impulses
FASTER ----> skeletal muscle... SLOWER ----> gut, glands... determi…
58 terms
Signal Conduction Along Nerves
Electrical Current
Graded Response & Action Potential
Graded Response
Graded response
Info is carried by nerves in the form of ________.
What are the 2 forms of electrical Signals?
Occur at sensory receptor endings and dendrites
Produced by a stimulus (Light in cells of retina/ sound waves…
Electrical Current
Info is carried by nerves in the form of ________.
Graded Response & Action Potential
What are the 2 forms of electrical Signals?
76 terms
Signal Conduction Along Nerves
Information is carried by nerves in th…
There are 2 forms of electrical signals
Graded response
Larger the stimulus, the greater the
electrical current
graded response... action potential
"pond ripples"... occur at sensory receptor endings and dendrite…
change in RMP... and farther the current flows
Information is carried by nerves in th…
electrical current
There are 2 forms of electrical signals
graded response... action potential
186 terms
Signal Conduction Along Nerves
How is information carried along nerve…
What are the 2 forms of electrical sig…
what is a graded respones?
Where does graded response occur?
Information is carried by nerves in the form of electrical cu…
1. Graded Response... 2. Action Potential
short lived, local changes in resting membrane potential
sensory receptor endings and dendrites
How is information carried along nerve…
Information is carried by nerves in the form of electrical cu…
What are the 2 forms of electrical sig…
1. Graded Response... 2. Action Potential
25 terms
Physiology - Signal Conduction
Structure of a neuron: directional sig…
Dendrites bind neurotransmitters and g…
Amplitudes are graded by
Responses are combined by
dendrite to presynaptic terminal
excitatory and inhibitory post synaptic potentials
stimulus strength and distance
spatial and temporal summation
Structure of a neuron: directional sig…
dendrite to presynaptic terminal
Dendrites bind neurotransmitters and g…
excitatory and inhibitory post synaptic potentials
27 terms
Signal Conduction Along Nerves
Two Forms of Electrical Signals
Graded Response
Action Potential
Profile of Voltage Changes
graded response and action potential
-occur at sensory receptor endings and dendrites... -produced by…
"magical pond"... -generated by excitable tissue (nerves + muscl…
1. RMP -70 mv... 2. Depolarization sufficient to reach threshold…
Two Forms of Electrical Signals
graded response and action potential
Graded Response
-occur at sensory receptor endings and dendrites... -produced by…
19 terms
Nerve Signal Conduction
What is the function of neurons?
Action Potential
resting potential
potential energy
conduct nerve signals/ transmit information
a nerve's signal
the energy a neuron has when fully charged
the readiness the nerve has to be used
What is the function of neurons?
conduct nerve signals/ transmit information
Action Potential
a nerve's signal
16 terms
Signal Conduction Along Nerves
What is signal conduction along nerves?
What are the 2 forms of electrical sig…
What occurs at sensory receptor ending…
What produces a graded response?
Information is carried by nerves in the form of electrical cu…
Graded Response... Action Potential
Graded Response
A stimulus (eg light in cells of retina sound waves in recept…
What is signal conduction along nerves?
Information is carried by nerves in the form of electrical cu…
What are the 2 forms of electrical sig…
Graded Response... Action Potential
15 terms
Signal conduction in the nervous system
What affects the speed at which a nerv…
What nerve fibers can not regenerate?
Electrophysiology
Electrical potential
1.)Diameter of fiber- larger fibers have more SA and have hav…
CNS fibers
Study of cellular mechanisms for producing electrical potenti…
a difference in concentration of charged particles between on…
What affects the speed at which a nerv…
1.)Diameter of fiber- larger fibers have more SA and have hav…
What nerve fibers can not regenerate?
CNS fibers
55 terms
Nerve Conduction/Signal Transmision
What ion is most responsible for resti…
What ion is responsible for action pot…
What ion is hyperpolerization due to?
What is "latency" due to?
K
- Na... - Node of Ranvier
K
- Na channel inactivation... - Open K channels
What ion is most responsible for resti…
K
What ion is responsible for action pot…
- Na... - Node of Ranvier
17 terms
Conduction of Electrical Signals
define a cell at rest electrically
Explain how opening or closing of gate…
what makes for a fast and efficient el…
current vs voltage
cell at rest has a net current of 0. net current must be 0 fo…
must have all three changes: ... 1. a net current into or out of…
...
water pressure = voltage; flow of water = current. Voltage an…
define a cell at rest electrically
cell at rest has a net current of 0. net current must be 0 fo…
Explain how opening or closing of gate…
must have all three changes: ... 1. a net current into or out of…
213 terms
Exam 4- Nerves and Signal Conduction
Information is carried by nerves in th…
2 forms of electrical signals
Neuron at rest =
Graded Response
electrical current
Graded Response... Action Potential
polarized
occur at sensory end receptor endings and dendrites... produced…
Information is carried by nerves in th…
electrical current
2 forms of electrical signals
Graded Response... Action Potential
40 terms
Cardio: Origin and Conduction of the Signal to Contract
The pacemaker
Gap junctions
T type calcium channel
Funny channel
To pump effectively teh contraction of all heart muscles cell…
As the pacemaker reaches threshold and begins its action pote…
ion channel of the SA and AV node cells. Transeitn calcium ch…
ion channel of the SA and AV node. Sodium channel that opens…
The pacemaker
To pump effectively teh contraction of all heart muscles cell…
Gap junctions
As the pacemaker reaches threshold and begins its action pote…
53 terms
BIOL 2140 Signal Conduction of Nerves
Depolarization
What happens to the inside of a cell d…
where are Na/K pumps found on a neuron?
where are chemically gated ion channel…
A change in resting membrane potential
the inside of the cell becomes more positive than it was at r…
all over
dendrites and cell body
Depolarization
A change in resting membrane potential
What happens to the inside of a cell d…
the inside of the cell becomes more positive than it was at r…
54 terms
Conduction of Electrical Signals in Nerve Fibers
Passive Electrical Properties
Passive Electrical Properties arise wh…
Active Electrical Properties
gated membrane channels
constant across all cells... these are constant and these do no…
1. membrane leak channels that are always open - population o…
These change during electrical signaling (compared to passive…
these are mostly closed in a resting cell and only open when…
Passive Electrical Properties
constant across all cells... these are constant and these do no…
Passive Electrical Properties arise wh…
1. membrane leak channels that are always open - population o…
36 terms
Conduction of Electrical Signals in Nerve Fibers
The passive properties of a cell are t…
What do passive electrical properties…
The active electrical properties are i…
What do the active electrical properti…
do not change
-membrane leak channels that are always open... -capacitance of…
generating an electrical signal
-they arise almost entirely from the opening and closing of g…
The passive properties of a cell are t…
do not change
What do passive electrical properties…
-membrane leak channels that are always open... -capacitance of…
17 terms
Cell Molec - Conduction of Bioelectrical Signals
electrotonic potential
action potential
nerve fibers as cables
current injection into an axon
- produced via the passive electrical properties of the neuro…
- spreads actively... - "all-or-none"... - propagates without decre…
- A nerve fiber (axon or dendrite) has many of the properties…
- Current injection depolarizes the membrane... - This depolariz…
electrotonic potential
- produced via the passive electrical properties of the neuro…
action potential
- spreads actively... - "all-or-none"... - propagates without decre…
Conduction of electrical signals in nerve fibers
Passive electrical properties are ____…
What are 3 factors that determine pass…
What does active electrical signaling…
What is current?
passive: constant... active: changes during electrical signaling
1.) membrane leak channels... 2.) capacitance of the membrane... 3.…
gated membrane channels
direction of net flow of positive charge
Passive electrical properties are ____…
passive: constant... active: changes during electrical signaling
What are 3 factors that determine pass…
1.) membrane leak channels... 2.) capacitance of the membrane... 3.…
19 terms
Test 3: Signal Conduction Along Nerves
Graded Response
Action Potential
Nerve Impulse
Refractory Period
Occur at sensory receptor endings and dendrites. Produced by…
Generated by excitable tissue. Are brief reversals of membran…
Traveling voltage change in neuron
From the opening of the sodium channels to the resetting of t…
Graded Response
Occur at sensory receptor endings and dendrites. Produced by…
Action Potential
Generated by excitable tissue. Are brief reversals of membran…
11 terms
physio quiz 2 - conduction of Action Potentials, signal conduction
which part of neuron is decremental po…
draw the axon hillock, threshold, Na+…
what will drive up the Na+ concentrati…
production of a series, that triggers…
(dendrites and soma)... decreases... because it spreads out and le…
...
thermodynamic laws
A.P.,... as potential progresses down axon, its depolarization…
which part of neuron is decremental po…
(dendrites and soma)... decreases... because it spreads out and le…
draw the axon hillock, threshold, Na+…
...
31 terms
Anatomy Exam #4 (Signal Conduction Along Nerves)
Myasthenia Gravis
Autoimmune Disease
Tubocurarine (Curare)
Anticholinesterases
*No action potential, cannot go from -70 to -55... *Muscles weak…
*Immune system has formed antibodies to Ach receptors ... *Ach r…
*Sit on receptor and block it, so the ion channels do not ope…
*Drugs that inhibit (block) AchE... *Stops the enzyme
Myasthenia Gravis
*No action potential, cannot go from -70 to -55... *Muscles weak…
Autoimmune Disease
*Immune system has formed antibodies to Ach receptors ... *Ach r…
25 terms
AP II Tst 3 Signal Conduction/Synapses
Signal Conduction in Nerve Fiber
Unmyelinated Fibers
Order of how happens: unmyelinated
Order of how happens: unmyelinated cont
a signal has to travel to the end of the axon if a neuron is…
has voltage-regulated ion gates along its entire length... -Na*…
Action potential at trigger zone... -Na enters the axon and dif…
-This chain keeps going until reaches the end of the axon
Signal Conduction in Nerve Fiber
a signal has to travel to the end of the axon if a neuron is…
Unmyelinated Fibers
has voltage-regulated ion gates along its entire length... -Na*…
11 terms
Signal Conduction Along Nerves for Anatomy Test 3
information is carried by nerves in th…
occurs at sensory receptor endings and…
generated by excitable tissue (nerves,…
Na+ and K+ VG channels open up, the RM…
signal conduction
graded response (GD)
action potential (AP)
1st step of depolarization
information is carried by nerves in th…
signal conduction
occurs at sensory receptor endings and…
graded response (GD)
30 terms
Modulation of conduction and nerve signalling - local anaesthetics
Nociceptive afferent nerves
Local anaesthetic affect:
events in AP
basic mechanism for local anaesthetic
- small diameter afferent fibres of peripheral nerves... - cell…
small part of nerve (localised!)
- up phase: rapid increase in sodium ion permeability (depola…
- prevent AP propagation... - target sodium ion channels, thus b…
Nociceptive afferent nerves
- small diameter afferent fibres of peripheral nerves... - cell…
Local anaesthetic affect:
small part of nerve (localised!)
29 terms
PHPY 301 - Lecture 13 - Signal Conduction & Propagation of Action Potentials
Flow of information in Neurons:... Dendr…
What are Postsynaptic Potentials (PSP)?
Excitatory versus Inhibitory
PSPs lose strength as the move through…
In most neurons, these are the principal synaptic input sites…
They are also called Graded Potentials (GP)
Depolarization - Excitatory Postsynaptic Potential (EPSP) / i…
1. Current leak... 2. Cytoplasmic resistance
Flow of information in Neurons:... Dendr…
In most neurons, these are the principal synaptic input sites…
What are Postsynaptic Potentials (PSP)?
They are also called Graded Potentials (GP)
27 terms
PHPY 301 - Lecture 13 - Signal Conduction & Propagation of Action Potentials
Flow of information in Neurons:... Dendr…
What are Postsynaptic Potentials (PSP)?
Excitatory versus Inhibitory
PSPs lose strength as the move through…
Signals (Voltage changes) flow from: Dendrites -> SOMA -> Axo…
They are also called Graded Potentials (GP)
1) Depolarization - Excitatory Postsynaptic Potential (EPSP)…
1. Current leak... 2. Cytoplasmic resistance
Flow of information in Neurons:... Dendr…
Signals (Voltage changes) flow from: Dendrites -> SOMA -> Axo…
What are Postsynaptic Potentials (PSP)?
They are also called Graded Potentials (GP)
29 terms
PHPY 301 - Lecture 13 - Signal Conduction & Propagation of Action Potentials
Flow of information in Neurons:... Dendr…
What are Postsynaptic Potentials (PSP)?
Excitatory versus Inhibitory
PSPs lose strength as the move through…
In most neurons, these are the principal synaptic input sites…
They are also called Graded Potentials (GP)
Depolarization - Excitatory Postsynaptic Potential (EPSP) / i…
1. Current leak... 2. Cytoplasmic resistance
Flow of information in Neurons:... Dendr…
In most neurons, these are the principal synaptic input sites…
What are Postsynaptic Potentials (PSP)?
They are also called Graded Potentials (GP)
29 terms
BMB Exam #1: Conduction of Electrical Signals in Nerve Fibers
Properties every cell has:
Passive electrical properties arise fr…
Active electric properties arise from...
membrane potential formula (Vm)
1) Passive (constant during resting or active)... 2) *active:…
--membrane leak channels (always open)... --capacitance of the m…
gated membrane channels
Vm = Vin - Vout
Properties every cell has:
1) Passive (constant during resting or active)... 2) *active:…
Passive electrical properties arise fr…
--membrane leak channels (always open)... --capacitance of the m…
25 terms
Chapter 48.3: Action Potentials are the Signals Conducted by Axons
How can changes in membrane potential…
hyperpolarization
hyperpolarization occurs when ______ c…
hyperpolarization _____ the chance tha…
gated ion channels that open or close in response to stimuli
-change in membrane potential that causes the inside of a mem…
-potassium (K+)... -negative
reduces
How can changes in membrane potential…
gated ion channels that open or close in response to stimuli
hyperpolarization
-change in membrane potential that causes the inside of a mem…
58 terms
A&P 2140 Test 4 pt. 1 - Signal Conduction Along Nerves
Graded Response and Action Potential
Graded Response
Action Potential
After hyper-polarization...
What are the 2 forms of electrical signals?
Occurs at sensory receptor endings and dendrites. Produced by…
Generated by excitable tissue (nerves & muscle cells). Are br…
Neuron is refractory (will not respond)
Graded Response and Action Potential
What are the 2 forms of electrical signals?
Graded Response
Occurs at sensory receptor endings and dendrites. Produced by…
58 terms
A&P 2140 Test 4 pt. 1 - Signal Conduction Along Nerves
Graded Response and Action Potential
Graded Response
Action Potential
After hyper-polarization...
What are the 2 forms of electrical signals?
Occurs at sensory receptor endings and dendrites. Produced by…
Generated by excitable tissue (nerves & muscle cells). Are br…
Neuron is refractory (will not respond)
Graded Response and Action Potential
What are the 2 forms of electrical signals?
Graded Response
Occurs at sensory receptor endings and dendrites. Produced by…
51 terms
U.S. Navy Signal Flags
Alfa
Bravo
Charlie
Delta
I have a diver down; keep well clear at slow speed.
I am taking in, discharging, or carrying dangerous cargo.
"Yes" or "affirmative"
I am maneuvering with difficulty; keep clear.
Alfa
I have a diver down; keep well clear at slow speed.
Bravo
I am taking in, discharging, or carrying dangerous cargo.
31 terms
Signal Flags
Alpha
Bravo
Charlie
Delta
I have a diver down; keep well clear at slow speed.
I am taking in, discharging, or carrying dangerous cargo.
"Yes" or "affirmative".
I am maneuvering with difficulty; keep clear.
Alpha
I have a diver down; keep well clear at slow speed.
Bravo
I am taking in, discharging, or carrying dangerous cargo.
11 terms
Neuron Conduction
Neuron
1) Dendrite
2) Soma
3) Axon Hillock
Brain/Nerve cells that carry electrical impulses (messages) t…
Inputs signal
Information integration
Signal is summed up
Neuron
Brain/Nerve cells that carry electrical impulses (messages) t…
1) Dendrite
Inputs signal
10 terms
Electrical Conduction System of the Heart and ECG Terms
Sinoatrial (SA) Node
Atrioventricular (AV) Node
Purkinje Fibers
Bundle of His
The pacemaker of the heart. This is where the electrical sign…
The electrical signal speeds from the conduction tissue in th…
These fast-conducting fibers spread the electrical signal thr…
Specialized conduction tissue in the interventricular septum;…
Sinoatrial (SA) Node
The pacemaker of the heart. This is where the electrical sign…
Atrioventricular (AV) Node
The electrical signal speeds from the conduction tissue in th…
82 terms
Police Signal Codes
Homicide
Rape
Robbery
Physical Assault
Signal 100
Signal 101
Signal 102
Signal 103
Homicide
Signal 100
Rape
Signal 101
60 terms
Heart Conduction
Automaticity
Conductivity
Contractility
Cardiac Muscles
The ability to generate electrical impulse
Ability to pass impulse to a neighboring cell
Ability to shorten muscle fibers-contraction strength
one of the three types of muscles (skeletal, smooth and cardi…
Automaticity
The ability to generate electrical impulse
Conductivity
Ability to pass impulse to a neighboring cell
25 terms
Neural Conduction
Membrane Potential
Resting Potential
Na+ and K+
Ion Channel Proteins
Difference in electric charge b/w the inside and outside of a…
-70mV; polarized neuron
In resting neurons... More Na+ outside than inside... More K+ insid…
Specialized for the passage of Na+ or K+ in/out of the cell
Membrane Potential
Difference in electric charge b/w the inside and outside of a…
Resting Potential
-70mV; polarized neuron
35 terms
Bone Conduction
bone conduction
carhart notch
Superior semicircular Dehisence (SCD)
SCD audiogram
sound transmission through bone... need high levels to detect ai…
frequency loss at 1, 2 ,4 khs... caused by otoscelorisis
hole is semicircular canal at temporal none... hear body sounds…
ABG of >15 at many frequencies
bone conduction
sound transmission through bone... need high levels to detect ai…
carhart notch
frequency loss at 1, 2 ,4 khs... caused by otoscelorisis
25 terms
Cardiac Conduction
arrhythmia
bradycardia
tachycardia
flutter
altered heart rhythm
slow heart rate; usually under 60 bpm
fast heart rate; usually over 100 bpm
very rapid, coordinated heart rhythm
arrhythmia
altered heart rhythm
bradycardia
slow heart rate; usually under 60 bpm
5 terms
Conduction System of the Heart
Sinoatrial (SA) Node
Atrioventricular (AV) Node
Purkinje Fibers
Bundle of His
The pacemaker of the heart. This is where the electrical sign…
The electrical signal speeds from the conduction tissue in th…
These fast-conducting fibers spread the electrical signal thr…
Specialized conduction tissue in the interventricular septum;…
Sinoatrial (SA) Node
The pacemaker of the heart. This is where the electrical sign…
Atrioventricular (AV) Node
The electrical signal speeds from the conduction tissue in th…
31 terms
Navy Signal Flags
Alpha
Bravo
Charlie
Delta
I have a diver down; keep well clear at slow speed.
I am taking in, discharging, or carrying dangerous cargo.
"Yes" or "affirmative".
I am maneuvering with difficulty; keep clear.
Alpha
I have a diver down; keep well clear at slow speed.
Bravo
I am taking in, discharging, or carrying dangerous cargo.
61 terms
Neural Conduction
Membrane Potential
Resting Potential
Na+ and K+
Ion Channel Proteins
Difference in electric charge b/w the inside and outside of a…
-70mV; polarized neuron
In resting neurons... More Na+ outside than inside... More K+ insid…
Specialized for the passage of Na+ or K+ in/out of the cell
Membrane Potential
Difference in electric charge b/w the inside and outside of a…
Resting Potential
-70mV; polarized neuron
Signal Delivery
Hardline Delivery
Attenuation
Coax and Fiber Optic
Coaxial Cable
Wired which used coax or fiber optic.
Loss of signal over a distance
Two methods of Hardline Delivery.
Type of cable that has an inner conductor surrounded by a tub…
Hardline Delivery
Wired which used coax or fiber optic.
Attenuation
Loss of signal over a distance
61 terms
Signal Codes
01
02
03
04
Call your office/ station
Call (specify number)
To radio shop
To motor pool
01
Call your office/ station
02
Call (specify number)
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