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Study sets matching "muscle contraction"

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Study sets matching "muscle contraction"

13 terms
Muscle Contraction
action potential
synapse
acetylcholine
troponin
A neural impulse; a brief electrical charge that travels down…
A junction where information is transmitted from one neuron t…
A neurotransmitter that among its fuctions, triggers muscle c…
A protein of muscle that together with tropomyosin forms a re…
action potential
A neural impulse; a brief electrical charge that travels down…
synapse
A junction where information is transmitted from one neuron t…
12 terms
Muscle contraction
Sarcolemma
Myofibrils
Sarcomeres
Myofilaments
muscle fibers are incased in a cell membrane are called-
strand like and can be bundled together to form a muscle segm…
portion of striated muscle fibril that lies between the two a…
Thin (actin) and Thick (myosin) threadlike structures.
Sarcolemma
muscle fibers are incased in a cell membrane are called-
Myofibrils
strand like and can be bundled together to form a muscle segm…
15 terms
Muscle Contraction
Motor unit
Axon
Axon terminal
Neuromuscular junction
One neuron and all the skeletal muscles it stimulates and con…
Nerve fiber; long thread like extension
What an axon branches off into
Site where axon terminal and muscle fiber meet
Motor unit
One neuron and all the skeletal muscles it stimulates and con…
Axon
Nerve fiber; long thread like extension
13 terms
muscle contraction
step 1... motor
step 2... voltage
step 3... calcium
step 4... integral
an action potential comes down from the brain to the spinal c…
the action potential coming down to the axon terminal causes…
the voltage change opens voltage regulated calcium channels
the integral protein allows an influx of calcium into the axo…
step 1... motor
an action potential comes down from the brain to the spinal c…
step 2... voltage
the action potential coming down to the axon terminal causes…
14 terms
Muscle Contraction
sliding filament theory
action potential
synapse
acetylcholine
theory that actin filaments slide toward each other during mu…
A neural impulse; a brief electrical charge that travels down…
Location at which a neuron can transfer an impulse to another…
Neurotransmitter that produces an impulse in a muscle cell
sliding filament theory
theory that actin filaments slide toward each other during mu…
action potential
A neural impulse; a brief electrical charge that travels down…
Muscle contraction
acetylcholine (ACh)
acetylcholinesterase (AChE)
actin
action potential
A chemical neurotransmitter in the brain and peripheral nervo…
An enzyme found in the synaptic cleft, bound to the postsynap…
The protein component of microfilaments that forms thin filam…
The ATP-dependent absorption or secretion of solutes across a…
acetylcholine (ACh)
A chemical neurotransmitter in the brain and peripheral nervo…
acetylcholinesterase (AChE)
An enzyme found in the synaptic cleft, bound to the postsynap…
13 terms
Muscle Contraction
Action potential
Neuromuscular junction
Motor neuron
Axon terminal
Message from the nerve
Synapse between the axon terminal of the motor neuron and ske…
a nerve cell forming part of a pathway along which impulses p…
Where the action potential is sent to
Action potential
Message from the nerve
Neuromuscular junction
Synapse between the axon terminal of the motor neuron and ske…
Muscle Contraction
Globular heads
Myosin and actin binding sites
Actin myosin crossbridges
Troponin
Hinged heads on the myosin filaments which are able to swing…
Myosin head has binding site for actin and binding site for A…
Formed when actin and myosin strands join together.
Attached to tropomyosin helps myofilaments to move past eacho…
Globular heads
Hinged heads on the myosin filaments which are able to swing…
Myosin and actin binding sites
Myosin head has binding site for actin and binding site for A…
16 terms
Muscle Contraction
motor unit
axon
axon terminal
neuromuscular junction
one neuron and all skeletal muscles it controls
a long tread-like extension of the neuron
branches of the axon that reach out to connect to the muscle
where the axon terminals and the sarcolemma of the muscle fib…
motor unit
one neuron and all skeletal muscles it controls
axon
a long tread-like extension of the neuron
10 terms
Muscle contraction
1
2
3
4
calcium enters cell
troponin binds calcium
troponin-tropomyosin "roll" out of the way
active site on actin exposed
1
calcium enters cell
2
troponin binds calcium
11 terms
Muscle Contraction
Brain sends signal (action potential t…
acetylcholine is released from the syn…
acetylcholine travels across the synap…
sodium ions diffuse into the muscle ce…
1
2
3
4
Brain sends signal (action potential t…
1
acetylcholine is released from the syn…
2
14 terms
Muscle contraction
Sliding filament theory
Motor neuron
Axon terminal
Action potential
...
Nerve cells that activate skeletal muscle cells
The end of a motor neuron
Message from nerve which jump from one cell to another
Sliding filament theory
...
Motor neuron
Nerve cells that activate skeletal muscle cells
10 terms
Muscle Contraction
1
2
3
4
calcium ions bind to troponin
troponin changes shape
tropomyosin moves off the actin binding sites
myosin heads bind to active sites on actin molecules
1
calcium ions bind to troponin
2
troponin changes shape
10 terms
Muscle Contraction
Step 1
Step 2
Step 3
Step 4
A motor neuron is stimulated. Then, a nerve impulse (action p…
Acetylcholine is released by the neuron
Ach diffuses across the synaptic cleft (neuromuscular junction)
The sarcolemma is stipulated and the impulse travels deep int…
Step 1
A motor neuron is stimulated. Then, a nerve impulse (action p…
Step 2
Acetylcholine is released by the neuron
22 terms
Muscle Contraction
EXCITATION
Arrival of nerve signal
Acetycholine (ACh) release
Binding of ACh to receptor
...
...
...
...
EXCITATION
...
Arrival of nerve signal
...
25 terms
Muscle Contraction
biceps brachii
biceps femoris
deltoid
frontalis
elbow flexor
extends thigh
arm abductor
raises eyebrows
biceps brachii
elbow flexor
biceps femoris
extends thigh
9 terms
muscle contraction
1
2
3
4
action potential travels down the motor cortex to the alpha m…
at the axon terminals, the action potential becomes chemical…
ACh is taken up by ACh receptors on the muscle fiber and move…
the electrical action potential causes calcium to be released…
1
action potential travels down the motor cortex to the alpha m…
2
at the axon terminals, the action potential becomes chemical…
12 terms
Muscle Contraction
1
2
3
4
Motor neuron sends action potential (nerve impulse) to the mu…
Acetylcholine (Ach) released from vesicles on motor neuron
Ach binds to receptors on muscle membrane and activates 2nd a…
action potential opens active transport pumps of sarcoplasmic…
1
Motor neuron sends action potential (nerve impulse) to the mu…
2
Acetylcholine (Ach) released from vesicles on motor neuron
16 terms
Muscle Contraction
Step 1
Step 2
Step 3
Step 4
an impulse arrives at the synapse between the motor neuron (p…
The transmitter substance (usually acetylcholine in muscles)…
Permeability of the muscle plasma membrane is altered (sodium…
The action potential travels along membrane of the muscle cel…
Step 1
an impulse arrives at the synapse between the motor neuron (p…
Step 2
The transmitter substance (usually acetylcholine in muscles)…
16 terms
Muscle Contraction
Action potential reaches axon terminal
ACh is released from vesicles by exocy…
ACh binds to motor endplate changing p…
Na+ rushes down the T-tubules and chan…
1
2
3
4
Action potential reaches axon terminal
1
ACh is released from vesicles by exocy…
2
17 terms
Muscle contraction
Myofibrils
Actin
Myosin
Sarcoplasmic reticulum
Elongated muscle cell organelle that makes up muscle cells an…
Thin filament
Thick filament
Muscle cell organelle that forms a network of membranes aroun…
Myofibrils
Elongated muscle cell organelle that makes up muscle cells an…
Actin
Thin filament
16 terms
Muscle contraction
1.
2.
3.
4.
Action potential is initated and propagates to motor neuron a…
Ca++ enters axon terminals through voltage gated ca++ channels
Ca++ entry triggers release of ACh from axon terminal
ACh diffusers from axon terminal to motor end plate in muscul…
1.
Action potential is initated and propagates to motor neuron a…
2.
Ca++ enters axon terminals through voltage gated ca++ channels
18 terms
Muscle Contraction
Step 1
ACH
Step 2
Step 3
Impulse reaches the neuromuscular junction (synaptic cleft) *…
neurotransmitter (transmits nerves)
ACH binds receptors on muscle cell produces new impulse.
Impulse travels across the sarcolemma and down the T-tubule.
Step 1
Impulse reaches the neuromuscular junction (synaptic cleft) *…
ACH
neurotransmitter (transmits nerves)
10 terms
Muscle contraction
Action Potential
Shorten
Sarcoplasm Reticulum
Prolong Contactions
What's the electrical current along the muscle cells membrane…
When muscle fibers contract, do they shorten or lengthen?
What stores the calcium that is released when a muscle contra…
What's a tetanus?
Action Potential
What's the electrical current along the muscle cells membrane…
Shorten
When muscle fibers contract, do they shorten or lengthen?
11 terms
Muscle Contraction
Skeletal Muscle
Smooth Muscle
Cardiac Muscles
3 Types ofMuscle Tissue
Bands of light & dark, voluntary.... conscious control
NO bands of light & dark, involuntary ex. stomach, blood vess…
Only found in the heart, involuntary
1. Skeletal... 2. Smooth... 3. Cardiac
Skeletal Muscle
Bands of light & dark, voluntary.... conscious control
Smooth Muscle
NO bands of light & dark, involuntary ex. stomach, blood vess…
15 terms
Muscle Contraction
Neurotransmitter/acetylcholine
Exocytosis
Diffusion
ACh receptors (channel-linked receptors)
Action potential travels from the brain down a 2-neuron pathw…
ACh is released into the synaptic cleft through exocytosis.
ACh diffuses through the synaptic cleft and binds to its rece…
Receptors are only found in the motor endplate region of the…
Neurotransmitter/acetylcholine
Action potential travels from the brain down a 2-neuron pathw…
Exocytosis
ACh is released into the synaptic cleft through exocytosis.
10 terms
Muscle Contraction
Sarcolemma
Sarcoplasmic Reticulum
Motor Unit
Neuron
Many oval nuclei can be seen jusy beneath the plasms membrane
A specialized smooth endoplasmic reticulum
A motor neuron and all the muscle cells it supplies
Specialized cell transmitting nerve/nerve cell
Sarcolemma
Many oval nuclei can be seen jusy beneath the plasms membrane
Sarcoplasmic Reticulum
A specialized smooth endoplasmic reticulum
muscle contraction- contraction cycle
ATP hydrolysis
cross bridge formation
power stroke
detachment
enzyme ATPase in myosin head uses H2o to cleave a phosphate f…
myosin head attaches to myosin binding site forming bridge
release of attached ADP + P from myosin head triggers power s…
when new ATP is available to attach to myosin head, myosin wi…
ATP hydrolysis
enzyme ATPase in myosin head uses H2o to cleave a phosphate f…
cross bridge formation
myosin head attaches to myosin binding site forming bridge
34 terms
Muscle contraction
Concentric contraction
Eccentric contractions
Isotonic muscle twitch
Isometric muscle twitch
whole muscle shortens
Whole muscle lengthens (contractile activity resists stretch)…
same tension
same length
Concentric contraction
whole muscle shortens
Eccentric contractions
Whole muscle lengthens (contractile activity resists stretch)…
21 terms
Muscle Contraction
Muscle Fiber
The cell membrane of muscle cells is c…
The cytoplasm of muscle cells is calle…
The endoplasmic reticulum is modified…
the long, multi-nucleated muscle cells that make up skeletal…
sarcolemma
sarcoplasm
sarcoplasmic reticulum (SR)
Muscle Fiber
the long, multi-nucleated muscle cells that make up skeletal…
The cell membrane of muscle cells is c…
sarcolemma
13 terms
Muscle Contraction
to begin muscle contraction, a nerve _…
when the impulse reaches the ______ of…
this neurotransmitter, stored inside o…
the neurotransmitter, _________, then…
impulse
axon, acetylcholine
cytoplasm of motor neuron
ACh, synaptic cleft
to begin muscle contraction, a nerve _…
impulse
when the impulse reaches the ______ of…
axon, acetylcholine
17 terms
Muscle Contraction: Contraction to Relaxation
1
2
3
4
AP from motor neuron
Release of acetylcholine
Depolarization
Stimulus spreads to t-tubules
1
AP from motor neuron
2
Release of acetylcholine
9 terms
Muscle Contraction
Sliding-filament Model
Cross Bridges
Cross-Bridge Cycle
Excitation-Contraction coupling
Muscles produce force and change length by the sliding of act…
When the two heads of myosin filament bind to actin at specif…
The myosin head binds to actin and uses the energy of ATP to…
Depolarization (excitation) leads to shortening (contraction)…
Sliding-filament Model
Muscles produce force and change length by the sliding of act…
Cross Bridges
When the two heads of myosin filament bind to actin at specif…
11 terms
muscle contraction
1
2
3
4
Action potential comes down axon of nerve and enters synaptic…
This causes synaptic vesicles to merge with presynaptic termi…
This causes synaptic vesicles to merge with presynaptic termi…
This causes sodium to enter cell (depolarization)
1
Action potential comes down axon of nerve and enters synaptic…
2
This causes synaptic vesicles to merge with presynaptic termi…
25 terms
Muscle contraction
Epimysium
Perimysium
Fascicle
Endomysium
Outer layer of muscle, connective tissue, continuous with ten…
Connective tissue layer underneath the epimysium. Covers sub…
Muscular sub unit covered by perimysium
Connective tissue layer in the Fascicle.... Covers individual mu…
Epimysium
Outer layer of muscle, connective tissue, continuous with ten…
Perimysium
Connective tissue layer underneath the epimysium. Covers sub…
20 terms
Muscle contraction
Hemostasis
Mechanisms of hemostasis
Vascular constriction is ..
Vascular constriction is achieved by ...
means prevention of blood loss. Whenever a vessel is severed…
(1) vascular constric tion, ... (2) formation of a platelet plu…
Immediately after a blood vessel has been cut or rup tured, t…
(1) local myogenic spasm,... (2) local autacoid factors from th…
Hemostasis
means prevention of blood loss. Whenever a vessel is severed…
Mechanisms of hemostasis
(1) vascular constric tion, ... (2) formation of a platelet plu…
9 terms
Muscle contraction
muscle contraction/sliding filament
resting sarcomere
step 1: Ca+ binds to
step 2: myosin head
once started, muscle contraction cannot be stopped... -atp is in…
adp + p attached to myosin head (stored energy)
troponin, exposing active site on actin
attaches to actin (myosin contains ATP)
muscle contraction/sliding filament
once started, muscle contraction cannot be stopped... -atp is in…
resting sarcomere
adp + p attached to myosin head (stored energy)
34 terms
Muscle Contraction
types of muscle contraction
twitch
latent period
refractory period
twitch, tetanus, treppe, isotonic, isometric
a single muscle contraction in response to a single stimulus;…
period of time between stimulation and activity
period of time in which a second stimulus will not revoke a s…
types of muscle contraction
twitch, tetanus, treppe, isotonic, isometric
twitch
a single muscle contraction in response to a single stimulus;…
8 terms
Muscle Contraction
Step 1
Step 2
Step 3
Step 4
Action potential from the motor neuron arrives
Acetylcholine is released
No matching answer
Generation of muscular action potential
Step 1
Action potential from the motor neuron arrives
Step 2
Acetylcholine is released
26 terms
Muscle Contraction
sarcomere
skeletal muscle has sarcomeres arrange…
z-disc to z-disc
Actin Skeletal Muscle
is the contractile unit of skeletal muscle and cardiac muscle
series... striated
the sarcomere
thin filament... wrapped with tryopmyosin... troponin attached to t…
sarcomere
is the contractile unit of skeletal muscle and cardiac muscle
skeletal muscle has sarcomeres arrange…
series... striated
19 terms
Muscle contraction
A ______ is a single skeletal muscle
Muscle fibers are made up of fiber bun…
Composed as T-tubule, the terminal cis…
Cylindrical structures that carry out…
Muscle fiber
Myofibrils
Triad junction
Myofibril
A ______ is a single skeletal muscle
Muscle fiber
Muscle fibers are made up of fiber bun…
Myofibrils
14 terms
Muscle Contraction
Step 1
step 2
step 3
step 4
Action Potential from CNS signals voluntary contraction
Action potential travels to the neuromuscular junction and ca…
Influx of calcium causes release of acetylcholine into the ex…
Acetylcholine triggers an action potential to be propagated o…
Step 1
Action Potential from CNS signals voluntary contraction
step 2
Action potential travels to the neuromuscular junction and ca…
muscle contraction
step 1
step 2
step 3
step 4
Generation of an action potential in the motor neuron causes…
The muscle action potential depolarizes the transverse tubule…
Depolarization of the T-tubule system causes Ca2+ release fro…
Ca2+ binds to troponin-tropomyosin in the actin filaments, ca…
step 1
Generation of an action potential in the motor neuron causes…
step 2
The muscle action potential depolarizes the transverse tubule…
9 terms
Muscle Contraction
1.
2.
3.
4.
A.P (action potential) in a neuron causes the release of N.T…
Muscle cell depolarizes (A.P) travels down T-Tubule causes ch…
Allows Ca++to flow in from the sarcoplasmic reticulum
Ca++ binds to troponin (thin) in sarcomere
1.
A.P (action potential) in a neuron causes the release of N.T…
2.
Muscle cell depolarizes (A.P) travels down T-Tubule causes ch…
14 terms
Muscle Contraction
1
2
3
4
Neuron releases ACh
ACh binds to sarcolemma
Sodium channels open
Sodium rushes into cell
1
Neuron releases ACh
2
ACh binds to sarcolemma
16 terms
Muscle Contraction
synapse
neurotransmitter
motor neurons
neuromuscular junction
site where neurons and axons meet
what is released at the synapse in order for the neurons to c…
Neurons that control effectors, including skeletal muscle... fib…
the synapse where a motor neuron axon and skeletal muscle meet
synapse
site where neurons and axons meet
neurotransmitter
what is released at the synapse in order for the neurons to c…
8 terms
Muscle Contraction
movement of the thin filaments depends…
necessary for the formation of cross-b…
necessary for myosin to "pull" the thi…
step 1
cross-bridges
calcium
energy derived from the hydrolysis of ATP
ATP is bound to myosin and myosin is detached from actin
movement of the thin filaments depends…
cross-bridges
necessary for the formation of cross-b…
calcium
12 terms
Muscle Contraction
1
2
3
4
an action potential travels down a motor neuron to the neurom…
acetylcholine is released into the synaptic cleft and binds t…
acetylcholine is broken down by the enzyme acetylcholinesterase
the action potential is propagated down the muscle fiber alon…
1
an action potential travels down a motor neuron to the neurom…
2
acetylcholine is released into the synaptic cleft and binds t…
12 terms
Muscle Contraction
Initiation of skeletal muscle
Initiation of smooth muscle
Initiation for Cardiac muscles
Organization of units
neural, with motoneuron bodies located in the ventral horn of…
multiple initiation mechanisms... neural: exclusively autonomic,…
intrinsic pacemaker activity
skeletal: motor units... smooth: syncytial and multi-unit... cardia…
Initiation of skeletal muscle
neural, with motoneuron bodies located in the ventral horn of…
Initiation of smooth muscle
multiple initiation mechanisms... neural: exclusively autonomic,…
31 terms
Muscle Contraction
Muscle Fiber
Neuromuscluar junction
Myofibrils
Sarcomere
Long multi-nucleated cells
Where synaptic bulb and muscle fiber connect
Contained with in muscle fibers, they house many contractile…
Contractile units of myofibrils that run adjacent to one anot…
Muscle Fiber
Long multi-nucleated cells
Neuromuscluar junction
Where synaptic bulb and muscle fiber connect
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