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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
23 terms
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
6 terms
skeletal muscle contraction
sliding filament theory
atpase
neuromuscular junction
axon
sliding filament theory
breaks down ATP to ADP ... uses he energy from that reaction
neuromuscular junction
end of motor neuron
sliding filament theory
sliding filament theory
atpase
breaks down ATP to ADP ... uses he energy from that reaction
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
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…
Muscle contraction - skeletal muscle
Actin and myosin
Sarcomere
Sarcolemma
Sarcoplasm
Which 2 protein filaments does a sarcomere contain?
The name of a skeletal muscle cell
The membrane of a sarcomere
The cytoplasm of a sarcomere
Actin and myosin
Which 2 protein filaments does a sarcomere contain?
Sarcomere
The name of a skeletal muscle cell
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…
28 terms
Skeletal muscle and muscle contraction
Tendon
Epimysium
Fasciculi
Perimysium
Connects bone to muscle
Aka Fascia; covers the entire muscle
Makes up the muscle
Covers the fasciculi
Tendon
Connects bone to muscle
Epimysium
Aka Fascia; covers the entire muscle
Skeletal Muscle Contraction
3 Types of Muscle
Skeletal Muscle
Epimysium, Perimysium, Endomysium
Functions of Skeletal Muscle
Skeletal- striated... Smooth- lacks striations... Cardiac- controll…
Striated, long fibres, multinucleated (nuclei pushed to perip…
Moves/stabilises skeleton... Forms sphincters in digestive/urina…
3 Types of Muscle
Skeletal- striated... Smooth- lacks striations... Cardiac- controll…
Skeletal Muscle
Striated, long fibres, multinucleated (nuclei pushed to perip…
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
11 terms
Skeletal Muscle Contraction
motor neuron
cell body
axon
motor end plate
a nerve cell which conducts an impulse to the muscle
where the impulse is generated, found in the brain/ spinal cord
it transmits/ carries the impulse to the muscle
on the muscle, the axon meets it at the neuromuscular junction
motor neuron
a nerve cell which conducts an impulse to the muscle
cell body
where the impulse is generated, found in the brain/ spinal cord
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
16 terms
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)
26 terms
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
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
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
21 terms
Skeletal Muscle Contraction
Skeletal muscle fiber
Sarcoplasmic reticulum
Myosin filament
Actin filament
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
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
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
27 terms
Skeletal Muscle Contraction
A muscle fiber contraction is a comple…
The final result of a muscle fiber con…
A myosin molecule is composed of ____…
In the presence of __________ ions, th…
cellular... chemical
action... myosin... sarcomeres
2... cross-bridges
Calcium
A muscle fiber contraction is a comple…
cellular... chemical
The final result of a muscle fiber con…
action... myosin... sarcomeres
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…
44 terms
Skeletal Muscle Contraction
Sarcomere
Myofiber
Myofibril
What is the hierarchy of skeletal musc…
unit of myofilaments in a skeletal muscle cell; sections in s…
Smallest contractile unit of skeletal muscle; multinucleated,…
elongated rod-like contractile unit found of striated muscle…
Myofilaments → Sarcomere → Myofibrils → Myofiber (cell) → Fas…
Sarcomere
unit of myofilaments in a skeletal muscle cell; sections in s…
Myofiber
Smallest contractile unit of skeletal muscle; multinucleated,…
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…
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
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
11 terms
process of skeletal muscle contraction
Steps of contraction
Excitation
Excitation-contraction coupling
Crossbridge cycling
1.Excitation... 2.Excitation-contraction coupling... 3.Crossbridge…
takes place at the neuromuscular junction.
Takes places in sarcolemma, T-tubules, and sarcoplasmic retic…
takes place in sarcomere.
Steps of contraction
1.Excitation... 2.Excitation-contraction coupling... 3.Crossbridge…
Excitation
takes place at the neuromuscular junction.
27 terms
Contraction of skeletal muscle 6
Major determinant of whole metabolic a…
Body muscle composition
Three types of muscle
Skeletal muscle fxn
Muscle mass
40% skeletal muscle... 10% smooth and cardiac muscle
1. Skeletal... 2. Smooth... 3. Cardiac
1. Locomotion ... 2. Heat production... 3. Reserve of protein for g…
Major determinant of whole metabolic a…
Muscle mass
Body muscle composition
40% skeletal muscle... 10% smooth and cardiac muscle
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…
44 terms
Mechanisms of Skeletal Muscle Contraction
sarcolemma
myofibrils
titin protein
myosin
cell membrane of muscle fiber
-unit of muscle fiber... -contains 1500 myosin filaments and 300…
adds stiffness to muscle fibers
thick filaments
sarcolemma
cell membrane of muscle fiber
myofibrils
-unit of muscle fiber... -contains 1500 myosin filaments and 300…
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…
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…
37 terms
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…
15 terms
skeletal muscle contraction
skeletal muscle innervations
alpha motor neuronal axon
motor unit
Schwann cells
motor end plate
-location: ventral horn of spinal cord gray matter... -supplies…
-alpha motor neuron... -all muscle cells it supplies
supplies the axon
skeletal muscle innervations
motor end plate
alpha motor neuronal axon
-location: ventral horn of spinal cord gray matter... -supplies…
17 terms
Skeletal Muscle Contraction
__ must stimulate muscle- __ for muscl…
__ must be present at the same time
a decrease in ACh = muscle __
creatine phosphate contain high energy…
neurotransmitter, acetylcholine
ATP
relaxation
phosphate bonds
__ must stimulate muscle- __ for muscl…
neurotransmitter, acetylcholine
__ must be present at the same time
ATP
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
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
Skeletal Muscle Contraction #1
Name the innervation of Skeletal Muscl…
Describe the electrical stimulation fo…
How do Skeletal Muscles form?
Does Skeletal Muscle require an enzyme…
Skeletal: Somatic NS... Cardiac: Autonomic NS... Smooth: Autonomic NS
Skeletal: isolated from neighboring cells... Cardiac: Connected…
Stem Cell to Myoblast to Myotube to Muscle Fiber
Yes - integrin
Name the innervation of Skeletal Muscl…
Skeletal: Somatic NS... Cardiac: Autonomic NS... Smooth: Autonomic NS
Describe the electrical stimulation fo…
Skeletal: isolated from neighboring cells... Cardiac: Connected…
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…
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…
9 terms
Contraction of Skeletal Muscle
muscle tension
load
motor unit
muscle twitch
force exerted on object by contracting muscles
force exerted on muscle by weigh of object to be moved
motor neuron and all muscle fibers it supplies. motor units i…
muscle response to a single, brief threshold stimulus. 3 phas…
muscle tension
force exerted on object by contracting muscles
load
force exerted on muscle by weigh of object to be moved
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.
18 terms
MUSCLE CONTRACTION II (skeletal muscle)
Skeletal muscle
Sarcolemma
T tubules (transverse) DES
T tubules (transverse) FUNC
large bundles of long cells called muscle fibres
cell membrane of muscle fibre cell
parts of sarcolemma folded inwards across muscle fibre stuck…
help spread electrical impulses throughout sarcoplasm ensurin…
Skeletal muscle
large bundles of long cells called muscle fibres
Sarcolemma
cell membrane of muscle fibre cell
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.
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
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…
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