Study sets matching "contraction skeletal muscle"

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Study sets matching "contraction skeletal muscle"

22 terms
Skeletal Muscle Contraction Quiz
Skeletal muscle fiber
Sarcoplasmic reticulum
Myosin filaments
Actin filaments
Structure at 1 (cell)
Structure at 2
Structure at 3 (thick)
Structure at 4 (thin)
Skeletal muscle fiber
Structure at 1 (cell)
Sarcoplasmic reticulum
Structure at 2
Skeletal Muscle Contraction
Functional properties of muscle cells
Motor unit
Neurotransmitter
Acetylcholine
Include irritability/responsiveness, contractility, extensibi…
A motor neuron and all the skeletal muscle cells it innervates
Chemical messengers that cross the neuromuscular junction to…
Neurotransmitter that diffuses across the synaptic cleft and…
Functional properties of muscle cells
Include irritability/responsiveness, contractility, extensibi…
Motor unit
A motor neuron and all the skeletal muscle cells it innervates
26 terms
Skeletal Muscle Contraction
Skeletal muscle fiber
Sarcoplasmic reticulum
Myosin filaments
Actin filaments
Structure at 1 (cell)
Structure at 2
Structure at 3 (thick)
Structure at 4 (thin)
Skeletal muscle fiber
Structure at 1 (cell)
Sarcoplasmic reticulum
Structure at 2
42 terms
Contraction of skeletal muscle
what is skeletal muscle connected to?
what is muscle made from? organized in…
what covers each subdivision of skelet…
what makes up a muscle?
bone on each end
muscle fibers(cells), into fascicles
connective tissue
multiple fascicles
what is skeletal muscle connected to?
bone on each end
what is muscle made from? organized in…
muscle fibers(cells), into fascicles
49 terms
Anatomy: Skeletal Muscle Contraction
epimysium
perimysium
endomysium
sarcolema
surrounds around the entire muscle cell, it is the outermost…
surrounds 10-100 or more muscle fibers separating into bundle…
surrounds each separate individual muscle fiber
the plasma membrane of muscle fiber
epimysium
surrounds around the entire muscle cell, it is the outermost…
perimysium
surrounds 10-100 or more muscle fibers separating into bundle…
26 terms
Skeletal Muscle Contraction
Skeletal muscle fiber
Sarcoplasmic reticulum
Myosin filaments
Actin filaments
Structure at 1 (cell)
Structure at 2
Structure at 3 (thick)
Structure at 4 (thin)
Skeletal muscle fiber
Structure at 1 (cell)
Sarcoplasmic reticulum
Structure at 2
77 terms
Contraction and relaxation of skeletal muscle
muscle action potential
motor neuron
motor unit
axon
Before a skeletal muscle fiber can contract, it must be stimu…
Muscle action potential is delivered by this, its neuron.
A single motor neuron along with all the muscle fibers it sti…
Long process of a motor neuron.
muscle action potential
Before a skeletal muscle fiber can contract, it must be stimu…
motor neuron
Muscle action potential is delivered by this, its neuron.
20 terms
Skeletal Muscle Contraction
1st step of skeletal muscle contraction
2nd step of skeletal muscle contraction
3rd step of skeletal muscle contraction
4th step of skeletal muscle contraction
An action potential travels along a motor neuron toward a ske…
At the junction, acetylcholine vesicles are released.
Acetylcholine binds to its receptor on the sarcolemme causing…
The action potential travels through the T-tubules, allowing…
1st step of skeletal muscle contraction
An action potential travels along a motor neuron toward a ske…
2nd step of skeletal muscle contraction
At the junction, acetylcholine vesicles are released.
Anatomy-Skeletal Muscle Contraction
___________ ___________ involves sever…
Muscle contractions involves several _…
Muscle contractions involves several c…
Muscle contractions involves _________…
muscle contraction
components, shortening, pulling, attachments
result, sarcomeres, muscle
several, against
___________ ___________ involves sever…
muscle contraction
Muscle contractions involves several _…
components, shortening, pulling, attachments
Skeletal Muscle Contraction
Contraction types and force
Isometric Contraction
Isotonic/Concentric Contraction
Eccentric Contraction
- Total force = passive force + active force... - Passive force…
- no change in muscle length... - If the load is too great the m…
- 3 phases:... 1. Isometric contraction- muscle developing force…
- Muscle is stretched while it is contracting... - external load…
Contraction types and force
- Total force = passive force + active force... - Passive force…
Isometric Contraction
- no change in muscle length... - If the load is too great the m…
Contraction of Skeletal Muscle
7
2
8
6
Energized myosin heads attach to actin
Acetylcholine is released into synaptic cleft
Power stroke pulls action toward center of sarcomere
calcium binds with troponin-tropomyosin and exposes binding s…
7
Energized myosin heads attach to actin
2
Acetylcholine is released into synaptic cleft
Skeletal Muscle Contraction
Neuromuscular Junction
Sarcoplasmic Reticulum
Actin and Myosin
Actin and Myosin
1) motor neurons release acetocholine... 2) acetocholines bind t…
1)When sodium gets to sisternae, calcium is released... and goes…
1) calcium binds to tropinin... 2)tropomine moves to tropomyosin…
1) myosin heads move+push actin towards m-line... 2) ATP is used…
Neuromuscular Junction
1) motor neurons release acetocholine... 2) acetocholines bind t…
Sarcoplasmic Reticulum
1)When sodium gets to sisternae, calcium is released... and goes…
6 terms
Skeletal Muscle Contraction
The amount of active force depends on:
Passive force of a muscle
The maximum velocity of shortening (ho…
Patients with CPTII deficiency show:
1) The number of myosin cross-bridges attached to actin filam…
Force is stored in muscle that occurs when the muscle is *str…
The actin-activated myosin ATPase activity (how fast myosin c…
Exercise intolerance in sustained-long-term exercise
The amount of active force depends on:
1) The number of myosin cross-bridges attached to actin filam…
Passive force of a muscle
Force is stored in muscle that occurs when the muscle is *str…
10 terms
Skeletal Muscle Contraction
first step
second step
third step
fourth step
Impulse sent by motor neuron to motor end plate ( axon termin…
At the axon terminal is the neuromuscular junction (NMJ)where…
At the NMJ there is a gap = synaptic cleft which fills with a…
ACh triggers the receptors of the muscle fibers sarcolemma to…
first step
Impulse sent by motor neuron to motor end plate ( axon termin…
second step
At the axon terminal is the neuromuscular junction (NMJ)where…
22 terms
Contraction of Skeletal Muscle
When does the actin/myosin overlap inc…
When is the actin/myosin overlap minim…
How is calcium attracted to troponin?
What is the "light switch" to muscle c…
During muscle contraction
When muscle is stretched
Diffusion gradient
Calcium
When does the actin/myosin overlap inc…
During muscle contraction
When is the actin/myosin overlap minim…
When muscle is stretched
10 terms
Contraction of skeletal muscle terms
Synaptic terminal
Acetylcholine (ACh)
Synaptic cleft
Motor end plate
The end of a neuron
Neurotransmitter/chemical released by a neuron to change the…
The gap between cells
Muscle surface that has receptors, (like switches) for ACH to…
Synaptic terminal
The end of a neuron
Acetylcholine (ACh)
Neurotransmitter/chemical released by a neuron to change the…
26 terms
Skeletal Muscle Contraction structures
Skeletal muscle fiber
Sarcoplasmic reticulum
Myosin filaments
Actin filaments
Structure at 1 (cell)
Structure at 2
Structure at 3 (thick)
Structure at 4 (thin)
Skeletal muscle fiber
Structure at 1 (cell)
Sarcoplasmic reticulum
Structure at 2
26 terms
Skeletal Muscle Contraction
Skeletal muscle fiber
Sarcoplasmic reticulum
Myosin filaments
Actin filaments
Structure at 1 (cell)
Structure at 2
Structure at 3 (thick)
Structure at 4 (thin)
Skeletal muscle fiber
Structure at 1 (cell)
Sarcoplasmic reticulum
Structure at 2
22 terms
Contraction of Skeletal Muscle
All-or-none Principle
Twitch
Myogram
Step 1 of twitch
The muscle or nerve responds completely or not at all
AKA Fasiculation ... A small involuntary muscle contraction and…
A graphical recording of muscle activity
Latent period: The time from stimulation of the muscle until…
All-or-none Principle
The muscle or nerve responds completely or not at all
Twitch
AKA Fasiculation ... A small involuntary muscle contraction and…
26 terms
Skeletal Muscle Contraction
Skeletal muscle fiber
Sarcoplasmic reticulum
Myosin filaments
Actin filaments
Structure at 1 (cell)
Structure at 2
Structure at 3 (thick)
Structure at 4 (thin)
Skeletal muscle fiber
Structure at 1 (cell)
Sarcoplasmic reticulum
Structure at 2
Skeletal Muscle Contraction Vocab
Motor Unit
Axon
Axon Terminals
Neuromuscular Junctions
one neuron and the muscle cells it supplies
A long projection off the cell body of a neuron down which an…
the end of an axon that branches off and form a junction with…
the region where a motor neuron comes into close contact with…
Motor Unit
one neuron and the muscle cells it supplies
Axon
A long projection off the cell body of a neuron down which an…
40 terms
Skeletal Muscle Contraction
Classification of muscles
muscle control
functional classification
Gross anatomy
striated-skeletal muscle and cardiac ... non striated - smooth
involuntary -smooth and cardiac ... voluntary -skeletal
striated voluntary -skeletal-attaches to bones... striated invol…
multinucleate cells ... -fibers are separated in to fasciculi wh…
Classification of muscles
striated-skeletal muscle and cardiac ... non striated - smooth
muscle control
involuntary -smooth and cardiac ... voluntary -skeletal
Skeletal Muscle Contraction
Skeletal muscle fiber
Sarcoplasmic reticulum
Myosin filaments
Actin filaments
Structure at 1 (cell)
Structure at 2
Structure at 3 (thick)
Structure at 4 (thin)
Skeletal muscle fiber
Structure at 1 (cell)
Sarcoplasmic reticulum
Structure at 2
32 terms
Skeletal Muscle Contraction
Functional properties of muscle cells
Motor unit
Nerve fiber
Axon terminal
Include irritability/responsiveness, contractility, extensibi…
A motor neuron and all the skeletal muscle cells it innervates
The axon of a neuron (nerve cell); insulated with a myelin sh…
The endpoint of an axon where neurotransmitters are stored
Functional properties of muscle cells
Include irritability/responsiveness, contractility, extensibi…
Motor unit
A motor neuron and all the skeletal muscle cells it innervates
30 terms
Skeletal muscle contraction
Myosin
Actin
Troponin
Tropomyosin
Consists of 2 twisted strands with globular cross-bridges pro…
A globular protein with myosin binding sites; tropomysosin an…
The smaller of the 2 proteins that are part of the actin fila…
The larger of the 2 proteins that are part of the actin filam…
Myosin
Consists of 2 twisted strands with globular cross-bridges pro…
Actin
A globular protein with myosin binding sites; tropomysosin an…
10 terms
Skeletal Muscle Contraction
sarcomere
myofilament
actin
myosin
one of the segments into which a myofibril is divided: smalle…
contractile proteins which interact to cause contraction
thin filaments
thick filaments
sarcomere
one of the segments into which a myofibril is divided: smalle…
myofilament
contractile proteins which interact to cause contraction
skeletal muscle contraction and relaxation
step 1 initiating muscle contractions
step 2 initiating muscle contractions
step 3 ... initiating muscle contractions
step 4... initiating muscle contractions
ACh is released , attaches to ACh receptors of sarcolemma
action potential moves across membrane surface and t tubules
sarcoplasmic reticulum releases stored calcium ions
calcium ions bind to troponin, exposing active sites on thin…
step 1 initiating muscle contractions
ACh is released , attaches to ACh receptors of sarcolemma
step 2 initiating muscle contractions
action potential moves across membrane surface and t tubules
52 terms
10a Skeletal Muscle Contraction
Muscle Tissue
muscle types
Cardiac muscle
smooth muscle
Motion results from alternating contraction and _relaxation o…
differ in their microscopic anatomy, location, and how they a…
wall of heart. Short and branched. Striated. Center located n…
attached to hair follicle. Wall of hollow organs. Non striate…
Muscle Tissue
Motion results from alternating contraction and _relaxation o…
muscle types
differ in their microscopic anatomy, location, and how they a…
10 terms
Steps of skeletal muscle contraction
Second Step
Fifth Step
Ninth Step
Fourth Step
Ach binds to Ach Receptor on muscle cell.
Calcium is released from the sarcoplasmic reticulum.
ATP bind myosin heads and heads release the actin filaments.
Action potential travels down the sarcolemma and enters the t…
Second Step
Ach binds to Ach Receptor on muscle cell.
Fifth Step
Calcium is released from the sarcoplasmic reticulum.
Muscle contraction - skeletal muscle
Actin and myosin
Sarcoplasm
Lactic acid
Fatigue
Which 2 protein filaments does a sarcomere contain?
Where in the muscle cell does anaerobic respiration occur?
What does anaerobic respiration cause the build up of?
What does the build up of lactic acid cause the muscle to do?
Actin and myosin
Which 2 protein filaments does a sarcomere contain?
Sarcoplasm
Where in the muscle cell does anaerobic respiration occur?
7 terms
skeletal muscle (muscle contraction)
neuromuscular junction
motor neuron
synaptic knob
synaptic cleft
the site at which nerve fiber connects to a muscle fiber.
a neuron that transmits impulses from the brain or spinal cor…
a rounded expansion at the end of a motor neuron, which produ…
small gap (space) between the membrane of a nerve fiber and t…
neuromuscular junction
the site at which nerve fiber connects to a muscle fiber.
motor neuron
a neuron that transmits impulses from the brain or spinal cor…
Contraction of Whole Skeletal Muscle
Graded Responses
Twitch
Summing Contractions
Incomplete Tetanus
different degrees of shortening... -can change frequency of stim…
Single, brief, jerky contraction; not normal
Stimuli closer together, no time to relax, effects get summed
More complete fusion of twitches, stimuli at a faster rate
Graded Responses
different degrees of shortening... -can change frequency of stim…
Twitch
Single, brief, jerky contraction; not normal
30 terms
Skeletal muscle contraction
Myosin
Actin
Troponin
Tropomyosin
Consists of 2 twisted strands with globular cross-bridges pro…
A globular protein with myosin binding sites; tropomysosin an…
The smaller of the 2 proteins that are part of the actin fila…
The larger of the 2 proteins that are part of the actin filam…
Myosin
Consists of 2 twisted strands with globular cross-bridges pro…
Actin
A globular protein with myosin binding sites; tropomysosin an…
Skeletal Muscle Contraction
What happens to the distance when musc…
Muscle Fiber
Sarcomere
What does the head of the myosin attac…
the distance between 2 lines shorten or sarcomere shortens
muscle cells divided into sections (sarcomeres)
functional unit of muscle contraction... -contains alternating b…
the actin, pulling the actin closer together, causing a contr…
What happens to the distance when musc…
the distance between 2 lines shorten or sarcomere shortens
Muscle Fiber
muscle cells divided into sections (sarcomeres)
33 terms
Physiology of Skeletal Muscle Contraction
Muscles
3 layers of connective tissue associat…
epimysium
perimysium
-transform chemical energy (ATP) into mechanical energy... -musc…
epimysium, perimysium, endomysium
outermost layer, around entire muscle
surrounds 10-100 or more muscle fibers sepaating them into bu…
Muscles
-transform chemical energy (ATP) into mechanical energy... -musc…
3 layers of connective tissue associat…
epimysium, perimysium, endomysium
26 terms
Skeletal Muscle Contraction
Skeletal muscle fiber
Sarcoplasmic reticulum
Thick filaments
Thin filaments
Structure at 1 (cell)
Structure at 2
Structure at 3
Structure at 4
Skeletal muscle fiber
Structure at 1 (cell)
Sarcoplasmic reticulum
Structure at 2
11 terms
contraction of skeletal muscle// SKELETAL MUSCLE
what does a monitor unit consist of?
what does motor unit size depend on?
what is the muscle twitch?
what is the grading muscle response as…
- 1 motor neuron and all muscle fibers it innervates (5-500 f…
how many fibers are in it
- response of a muscle to a shock... PHASES... 1. latent- no force,…
condition
what does a monitor unit consist of?
- 1 motor neuron and all muscle fibers it innervates (5-500 f…
what does motor unit size depend on?
how many fibers are in it
20 terms
physio-skeletal muscle contraction
where do we find the triad?
what does isometric mean?
how do you measure passive tension in…
what does isotonic means?
along the z line
constant length, just changing tension
you stretch the fiber beyond the active/normal length, that's…
tension stays the same, length changes
where do we find the triad?
along the z line
what does isometric mean?
constant length, just changing tension
20 terms
Skeletal muscle contraction
What is muscle contraction ?
Sliding filament theory is what?
How is sliding filament theory ?
What is ATP produced by and where?
Shortening of sarcomere
How muscles contract
Thin myofilaments (actin) slide past the thick myofilaments (…
Produced by cellular respiration and produced in mitochondria
What is muscle contraction ?
Shortening of sarcomere
Sliding filament theory is what?
How muscles contract
Skeletal Muscle Cell Contraction
Where is ACh released from
Where does ACh attach to
What does an ACh attachment cause
What is an action potential
Axon Terminals / Synaptic Vessels of a somatic motor neuron
Attach to to ACh receptors on the motor end plate of a skelet…
An action potential
the rushing in of Na+ into a cell
Where is ACh released from
Axon Terminals / Synaptic Vessels of a somatic motor neuron
Where does ACh attach to
Attach to to ACh receptors on the motor end plate of a skelet…
21 terms
contraction of a skeletal muscle
all or none principle
twitch
myogram
1st part of a twitch
physiological principle, when receiving an action potential,…
a brief, contractile response of a skeletal muscle from impul…
graphical recording of muscle activity
latent period:action potential moves, no tension across sarco…
all or none principle
physiological principle, when receiving an action potential,…
twitch
a brief, contractile response of a skeletal muscle from impul…
24 terms
Skeletal muscle contraction
Anatomy of a skeletal muscle
Picture of actin myosin and tropomyosi…
Picture of bands
Power stroke
Anatomy of a skeletal muscle
Picture of actin myosin and tropomyosi…
Summary of skeletal muscle contraction
Step one
Step two
Step three
Step four
AP travels along axon to NMJ
Ca2+ channels open, Ca2+ enters presynaptic terminal
Ach released from synaptic vesicles in presynaptic terminal
Ach diffuses across synaptic cleft, binds to receptor sites o…
Step one
AP travels along axon to NMJ
Step two
Ca2+ channels open, Ca2+ enters presynaptic terminal
27 terms
Skeletal Muscle Structure and Contraction
fascia
tendon
epimysium
perimysium
label the different parts of a skeletal muscle... (fascia, tend…
label the different parts of a skeletal muscle... (fascia, tend…
label the different parts of a skeletal muscle... (fascia, tend…
label the different parts of a skeletal muscle... (fascia, tend…
fascia
label the different parts of a skeletal muscle... (fascia, tend…
tendon
label the different parts of a skeletal muscle... (fascia, tend…
6 terms
Skeletal Muscle Contraction (Physio)
Fascicle
Where is calcium stored
Myofibril
Myofilament
Bundle of muscle fibers
Sarcoplasmic Reticulum
tightly packed filament bundles found within skeletal muscle…
Actin and Myosin
Fascicle
Bundle of muscle fibers
Where is calcium stored
Sarcoplasmic Reticulum
Skeletal Muscle Contraction
what is the structure of myosin?
what is the structure actin?
what are the constituents of a thin ch…
what is the function of tropomyosin?
pairs of actin binding heads wound around a tail all bound to…
G-actin polymerizes to form F-actin which then assembles with…
actin, tropomyosin, and troponin
to conceal the myosin binding sites
what is the structure of myosin?
pairs of actin binding heads wound around a tail all bound to…
what is the structure actin?
G-actin polymerizes to form F-actin which then assembles with…
34 terms
Skeletal Muscle Contraction
Where does the excitation of a skeleta…
Where does the excitation-contraction…
Where does cross-bridge cycling occur?
Muscle tissue's ability to receive and…
neuromuscular junction
sarcolemma, T-Tubules, and sarcoplasmic reticulum
sarcomere
responsiveness/excitability
Where does the excitation of a skeleta…
neuromuscular junction
Where does the excitation-contraction…
sarcolemma, T-Tubules, and sarcoplasmic reticulum
27 terms
Skeletal Muscle Structure and Contraction
fascia
tendon
epimysium
perimysium
label the different parts of a skeletal muscle... (fascia, tend…
label the different parts of a skeletal muscle... (fascia, tend…
label the different parts of a skeletal muscle... (fascia, tend…
label the different parts of a skeletal muscle... (fascia, tend…
fascia
label the different parts of a skeletal muscle... (fascia, tend…
tendon
label the different parts of a skeletal muscle... (fascia, tend…
32 terms
Muscle Physiology --skeletal muscle/contraction
skeletal and cardiac
skeletal
cardiac and smooth
skeletal muscle
striated muscle
voluntary muscle (somatic)
involuntary muscle (autonomic)
--movement... --metabolic regulation... --heat production
skeletal and cardiac
striated muscle
skeletal
voluntary muscle (somatic)
15 terms
Skeletal muscle 4 Contraction cycle
Triads
T tubules, Terminal Cisternae
Calcium Ions
tension
The site where muscle contractions begin
The passage of action potential goes along the __ _______ and…
Begins the muscles contractions
when muscle cells contract, they pull on collagen fibers and…
Triads
The site where muscle contractions begin
T tubules, Terminal Cisternae
The passage of action potential goes along the __ _______ and…
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