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Study sets matching "a muscle fiber"

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Study sets matching "a muscle fiber"

12 terms
A skeletal muscle fiber
epimysium
muscle fascicles
perimysium
muscle fibers
outer layer, ... dense irregular connective tissue,... separate tis…
central layer,... contain a bundle of muscle fibers - fascicle... c…
epimysium
outer layer, ... dense irregular connective tissue,... separate tis…
muscle fascicles
13 terms
Structures of a muscle fiber
Sarcolema
Sarcomere
I band (Region)
Tubules of sarcoplasmic reticulum
Thin tubular sheath that lines the muscle fiber
Basic unit of striated muscle
Area where different actin of different sarcomeres meet
Tubes that surround the myofibrils
Sarcolema
Thin tubular sheath that lines the muscle fiber
Sarcomere
Basic unit of striated muscle
10 terms
Structures of a Muscle Fiber
sarcoplasm
nuclei
myofibril
sarcolemma
- the cytoplasm
- bundles of myofilaments
- plasma membrane
sarcoplasm
- the cytoplasm
nuclei
7 terms
Ultrastructure of a Muscle Fiber
Z line
sarcomere
A band
myosin
no good picture
13
Z line
sarcomere
35 terms
Components of a muscle fiber
sarcolemma
sarcoplasm
glycogen
myoglobin
plasma membrane of a muscle fiber
cytoplasm of muscle fiber
an energy storage polysaccharide abundant in muscle
an oxygen storing red pigment of muscle
sarcolemma
plasma membrane of a muscle fiber
sarcoplasm
cytoplasm of muscle fiber
Anatomy of a Muscle Fiber
Fascicle
Endomysium
Perimysium
Epimysium
Individual muscle fibers that get bundled together
A collagen CT membrane surrounding each muscle fiber
A membrane surrounding each fascicle made of collagen
The outside layer made of collagen
Fascicle
Individual muscle fibers that get bundled together
Endomysium
A collagen CT membrane surrounding each muscle fiber
16 terms
Anatomy of a Muscle Fiber
Sarcolemma
Sarcoplasm
Myofibril
Sarcomere
The cell membrane of a muscle fiber. Outside of the muscle fi…
The cytoplasm of a muscle fiber. Contains organelle, myofibri…
A muscle fiber contains hundreds to thousands of these rod-li…
The smallest contractile element of skeletal muscle cells con…
Sarcolemma
The cell membrane of a muscle fiber. Outside of the muscle fi…
Sarcoplasm
The cytoplasm of a muscle fiber. Contains organelle, myofibri…
14 terms
Components of a Muscle Fiber
I band
Z disc/line
H zone
A band
just actin, lighter, less dense. Z disc is in the middle
extra actin protein, separate sarcomeres
Just Myosin, Narrow Region in center of each A band. when rel…
both myosin and Actin. H zone and M line are in the middle
I band
just actin, lighter, less dense. Z disc is in the middle
Z disc/line
extra actin protein, separate sarcomeres
27 terms
components of a muscle fiber
sarcolemma
sarcoplasm
glycogen
myoglobin
plasma membrane of a muscle fiber
cytoplasm of a muscle fiber
energy storage polysaccharide abundant in muscle
an oxygen storing red pigment of muscle
sarcolemma
plasma membrane of a muscle fiber
sarcoplasm
cytoplasm of a muscle fiber
7 terms
parts of a muscle fiber
endomysium
epimysium
permysium
fascicle
thin connective tissue investing each muscle cell
connective tissue ensheathing the entire muscle
connective tissue surrounding a fascicle
a discrete bundle of muscle cells
endomysium
thin connective tissue investing each muscle cell
epimysium
connective tissue ensheathing the entire muscle
18 terms
exciation of a muscle fiber
arrival of nerve signal
acetylcholine is released
binding of acetylcholine to receptors
opening of ligand gated ion channel, c…
1
2
3
4
arrival of nerve signal
1
acetylcholine is released
2
5 terms
Physiology of a Muscle Fiber
motor unit
Neuromuscular Junction (NMJ)
Events of Stimulus at NMJ
Events of Contraction
a motor nerve fiber and all of the muscle fibers innervated b…
the synapse between the branch of a motor neuron and a skelet…
a. Release of acetylcholine (ACh) --from synaptic vesicles in…
a. Na+ flow across the sarcolemma initiates an action potenti…
motor unit
a motor nerve fiber and all of the muscle fibers innervated b…
Neuromuscular Junction (NMJ)
the synapse between the branch of a motor neuron and a skelet…
17 terms
Structure of a Muscle Fiber
muscle fiber
sacromere
myofibril
myofilament
cell... -surrounded by endomysium
-structural unit of a muscle... -gives striations... -smallest cont…
-makes up the muscle fiber (cell) in bundles... -units of sarcom…
-protein threads... -made of actin, myosin, and tryponin
muscle fiber
cell... -surrounded by endomysium
sacromere
-structural unit of a muscle... -gives striations... -smallest cont…
7 terms
Depolarization of a Muscle Fiber
A motor neuron will cause a muscle fib…
As acetylcholine binds to
Step 1
Step 2
Depolarization causes the neurotransmitter acetycholine to be…
receptors on the muscle fiber, depolarization of the muscle c…
An action potential spreads along T tubules to the sarcoplasm…
This depolarization causes the sarcoplasmic reticulum to rele…
A motor neuron will cause a muscle fib…
Depolarization causes the neurotransmitter acetycholine to be…
As acetylcholine binds to
receptors on the muscle fiber, depolarization of the muscle c…
12 terms
Anatomy of a muscle fiber
Sacrolemma
T-tubules
Sarcoplasmic reticulum
Epimysium
Muscle cell membrane- carries nerve impulse to muscle contrac…
Invaginations (tunnels) in the sacrilege quickly spreads impu…
Similar to regular ER, however it stores ca+ ions that are ne…
CT that surround the whole muscle
Sacrolemma
Muscle cell membrane- carries nerve impulse to muscle contrac…
T-tubules
Invaginations (tunnels) in the sacrilege quickly spreads impu…
27 terms
components of a muscle fiber
sarcolemma
sarcoplasm
glycogen
myoglobin
plasma membrane of a muscle fiber
cytoplasm of a muscle fiber
energy storage polysaccharide abundant in muscle
an oxygen storing red pigment of muscle
sarcolemma
plasma membrane of a muscle fiber
sarcoplasm
cytoplasm of a muscle fiber
22 terms
Anatomy of a muscle fiber
Muscle fibers
Sartorius muscle
Multinucleate
Amitotic
Individual skeletal muscle cells, du to their length
Longest muscle, in the thight & contains the lomgest cell 30cm
Each fiber is________ in order to control protein synthesis a…
Unable to divide (unable to do mitosis)
Muscle fibers
Individual skeletal muscle cells, du to their length
Sartorius muscle
Longest muscle, in the thight & contains the lomgest cell 30cm
36 terms
Microscopic Anatomy of a Muscle Fiber
T-tubule
actin
troponin
tropomyosin
T-tubule
actin
26 terms
Muscle Fiber
Muscle fiber
Myofibrils
myofilaments
actin
single muscle cell, enclosed by the sarcolemma, contains myof…
bundle of protein myofilaments within a muscle fiber
Myosin and actin; carry out the contraction process
thin filaments
Muscle fiber
single muscle cell, enclosed by the sarcolemma, contains myof…
Myofibrils
bundle of protein myofilaments within a muscle fiber
23 terms
Microscopic Anatomy of a Muscle Fiber
Sarcolemma
Sarcolemma
Sarcoplasm
Glycogen and Myoglobin
Specializes plasma membrane
Cytoplasm of muscle cells
What does the sarcoplasm contain
Sarcolemma
Specializes plasma membrane
Sarcolemma
15 terms
microanatomy of a skeletal muscle fiber
sarcolemma
sarcolemma
sarcoplasmic reticulum (SR)
myofibril
plasma membrane of a muscle fiber
cytoplasm of a muscle fiber
smooth ER that is a calcium reservoir
contractile organelle inside muscle fiber
sarcolemma
plasma membrane of a muscle fiber
sarcolemma
cytoplasm of a muscle fiber
10 terms
A&P Muscle Fiber contractions
Step 1
Step 2
Step 3
Step 4
A nerve impulse travels down a motor neuron axon
a motor neuron terminal releases the neurotransmitter acetylc…
ACh binds to ACh receptors
The sarcolemma is stimulated, and a muscle impulse travels ov…
Step 1
A nerve impulse travels down a motor neuron axon
Step 2
a motor neuron terminal releases the neurotransmitter acetylc…
13 terms
Microscopic Anatomy of a Muscle Fiber
Sacrolemma
Sarcoplasm
Myofibril
Sarcoplasmic reticulum
Cell membrane
Cytoplasm; loaded with glycogen and myoglobin (makes cells red)
Small threads; 100-1000 per cell
Stores Ca+2; when released triggers contraction
Sacrolemma
Cell membrane
Sarcoplasm
Cytoplasm; loaded with glycogen and myoglobin (makes cells red)
Anatomy of a Muscle and Muscle Fibers
Epimysium
Fascicle
Perimysium
Endomysium
layer if collagen fibers that separate it from surrounding or…
Muscle made of bundles
Each fascicle is divided by another layer
Surrounds and individual muscle fiber... Contains nerves, capill…
Epimysium
layer if collagen fibers that separate it from surrounding or…
Fascicle
Muscle made of bundles
13 terms
Histology of a Skeletal Muscle Fiber
sarcolema
T tubules
nuclei
sarcoplasm
plasma membrane around a fiber that holds myofibrils together
invaginations of the sarcolemma into the cell that help sprea…
many located just beneath the sarcolemma
cytoplasm of a muscle cell
sarcolema
plasma membrane around a fiber that holds myofibrils together
T tubules
invaginations of the sarcolemma into the cell that help sprea…
11 terms
Contraction Events in a Muscle Fiber
Myosin heads bind to active sites on a…
ATP is hydrolyzed.
Myosin heads return to their high-ener…
Calcium Ions bind to troponin.
4
9
10
1
Myosin heads bind to active sites on a…
4
ATP is hydrolyzed.
9
15 terms
14 Parts of a Muscle Fiber
Sarcomere
Myosin
Actin
Z line (or disc)
Unit of contraction. Extends from one Z line to the next Z li…
Contractile protein that makes up thick filament.
Contractile protein that makes up thin filament.
Narrow plate-shaped regions of dense protein material. Passes…
Sarcomere
Unit of contraction. Extends from one Z line to the next Z li…
Myosin
Contractile protein that makes up thick filament.
24 terms
A&P histology of a muscle fiber cell
appearance of muscle fiber cell
myofibril
myofibrils contain
sarcolemma
long fiber-like structure with many scattered nuclei
-complex organelle of muscle fiber cell... -contains many myofil…
protein filaments(actin & myocin)
-Plasma membrane of a muscle fiber... -carries impulse along the…
appearance of muscle fiber cell
long fiber-like structure with many scattered nuclei
myofibril
-complex organelle of muscle fiber cell... -contains many myofil…
21 terms
Microscopic Anatomy of A Muscle Fiber
Specialized plasma membrane
Cytoplasm of muscle cells, contains la…
Specialized smooth endoplasmic reticulum
Stores/releases calcium and surrounds…
Sarcolemma
Sarcoplasm
Sarcoplasm Reticulum
What does the sarcoplasm reticulum do?
Specialized plasma membrane
Sarcolemma
Cytoplasm of muscle cells, contains la…
Sarcoplasm
25 terms
contraction of a skeletal muscle fiber
acetylcholine (ACh)
Sliding filament theory
postsynaptic Action Potential
Myosin connects to
The motor neuron releases, Presynaptic Action Potential (befo…
thin filaments pulled past thick filaments bycross-bridges
ACh binds to receptors on sarcolemma, changes permeability fo…
actin forming actomyosin (crossbridge)
acetylcholine (ACh)
The motor neuron releases, Presynaptic Action Potential (befo…
Sliding filament theory
thin filaments pulled past thick filaments bycross-bridges
16 terms
Physiology of a Skeletal Muscle Fiber
Threshold Voltage
Action Potential
Depolarizing Phase
Depolarization
Voltage at which Na+K+ channels are triggered to open
2 Phases - Depolarizing and Repolarizing
Any shift from resting membrane potential in the direction of…
Reduction in membrane potential
Threshold Voltage
Voltage at which Na+K+ channels are triggered to open
Action Potential
2 Phases - Depolarizing and Repolarizing
22 terms
Anatomy and Function of a Muscle Fiber
z disk
i band
a band
h zone
the attachment site for thin filaments between two sarcomeres
region occupied only by thin filaments; composed only of actin
the entire length of the thick filament
central region occupied only by think filaments
z disk
the attachment site for thin filaments between two sarcomeres
i band
region occupied only by thin filaments; composed only of actin
32 terms
Muscle Fiber
Muscle fiber
Myofibrils
myofilaments
actin
single muscle cell, enclosed by the sarcolemma, contains myof…
bundle of protein myofilaments within a muscle fiber
carry out the contraction process... thick filaments: composed o…
...
Muscle fiber
single muscle cell, enclosed by the sarcolemma, contains myof…
Myofibrils
bundle of protein myofilaments within a muscle fiber
12 terms
A&P Final-muscle fiber/cell
myofibril
mitochondria
neuromuscular junction
nucleus
myofibril
mitochondria
10 terms
Physiology of a Skeletal Muscle fiber
In order to contract, a skeletal muscl…
The nerve stimulus (the neuromuscular…
The neuromuscular junction is formed f…
Events at the Neuromuscular junction
1. Be stimulated by a nerve ending... 2. Propagate an electrica…
-Skeletal muscles are stimulated by motor neurons in nerves o…
1. Axon terminals- ends of axons that release acetylcholine f…
1. When a nerve impulse reaches the end of an axon at the neu…
In order to contract, a skeletal muscl…
1. Be stimulated by a nerve ending... 2. Propagate an electrica…
The nerve stimulus (the neuromuscular…
-Skeletal muscles are stimulated by motor neurons in nerves o…
67 terms
Structural components of a muscle fiber
Sarcolemma
Sarcoplasm
Glycogen
Myoglobin
The plasma membrane of a muscle fiber
The cytoplasm if a muscle fiber
An energy-storage polysaccharide abundant in muscle
An oxygen-storing red pigment of muscle
Sarcolemma
The plasma membrane of a muscle fiber
Sarcoplasm
The cytoplasm if a muscle fiber
11 terms
Contraction Events in a Muscle Fiber
Myosin heads bind to active sites on a…
ATP is hydrolyzed.
Myosin heads return to their high-ener…
Calcium Ions bind to troponin.
4
9
10
1
Myosin heads bind to active sites on a…
4
ATP is hydrolyzed.
9
10 terms
Muscle tissue structures found in a muscle fiber
Sarcoplasm
Nuclei
Mitochondria
Sarcoplasmic reticulum
Inside a muscle fiber surrounding the myofibrils ... Acts as cyt…
Squeezed between myofibrils... Coordinates contraction all at on…
Squeezed between myofibrils... Cellular respiration... Many mitocho…
A lot of them in sacs and pouches at either end of sarcomere…
Sarcoplasm
Inside a muscle fiber surrounding the myofibrils ... Acts as cyt…
Nuclei
Squeezed between myofibrils... Coordinates contraction all at on…
14 terms
Microscopic anatomy of a muscle fiber
Sarcoplasmic reticulum
Sacromere
Cross bridges
Muscle fiber
Name for the smoot hendoplasmic reticulum, stores Ca++ ions f…
Tiny contractile units lined up end to end on the myofibril
Projections or myosin heads that link the thin and thick fila…
Name for muscle cell
Sarcoplasmic reticulum
Name for the smoot hendoplasmic reticulum, stores Ca++ ions f…
Sacromere
Tiny contractile units lined up end to end on the myofibril
21 terms
Parts of a Muscle Fiber/ Parts of the Sarcomere
Sarcoplasmic reticulum (stores and rel…
Sarcolemma, plasma membrane
Myofibril
Sarcoplasm
Number 1.
Number 2.
Number 3.
Number 4.
Sarcoplasmic reticulum (stores and rel…
Number 1.
Sarcolemma, plasma membrane
Number 2.
27 terms
Structural Components of a Muscle Fiber
Sarcolemma
Sarcoplasm
Glycogen
Myoglobin
Plasma membrane of a muscle fiber
Cytoplasm of a muscle fiber
Energy-storage polysaccharide abundant in muscle
Oxygen-storing red pigment of muscle
Sarcolemma
Plasma membrane of a muscle fiber
Sarcoplasm
Cytoplasm of a muscle fiber
27 terms
Structural Components of a Muscle Fiber
Sarcolemma
Sarcoplasm
Glycogen
Myoglobin
The plasma membrane of a muscle fiber
The cytoplasm of a muscle fiber
An energy-storage polysacchride abundant in muscle
An oxygen-storing red pigment of muscle
Sarcolemma
The plasma membrane of a muscle fiber
Sarcoplasm
The cytoplasm of a muscle fiber
8 terms
Anatomy of a skeletal muscle fiber
Skeletal Muscle Fiber
Sarcolemma
T-Tubules
Sarcoplasm
a cell
plasma membrane
transverse tubule... inward extensions in the sarcolemma... allows…
cytoplasm
Skeletal Muscle Fiber
a cell
Sarcolemma
plasma membrane
11 terms
Components of a Skeletal Muscle Fiber
Myofibrils consist of bundles of prote…
The most abundant myofilaments are
The myofilaments with each myofibril a…
H Band
myofilaments
thin filaments composed primarily of actin, and thick filamen…
sarcomeres
-a lighter region on either side of M line... -contains thick fi…
Myofibrils consist of bundles of prote…
myofilaments
The most abundant myofilaments are
thin filaments composed primarily of actin, and thick filamen…
12 terms
A&P Final-muscle fiber/cell
myofibril
mitochondria
neuromuscular junction
nucleus
myofibril
mitochondria
12 terms
Parts of a Skeletal Muscle Fiber
Sarcolemma
Sarcoplasm
Myofibril
Myofilaments
Cell membrane or plasma membrane
Cytoplasm - includes nuclei, mitochondria, myofibrils
Composed of bundles of protein filaments that are important i…
Produce the bonding patterns or striations in the skeletal mu…
Sarcolemma
Cell membrane or plasma membrane
Sarcoplasm
Cytoplasm - includes nuclei, mitochondria, myofibrils
15 terms
structural components of a muscle fiber
Myglobin
Myofibril
myofilament
thick filament
an oxygen-storing red pigment of muscle
a bundle of protein microfilaments (myofilaments)
a threadlike complex of several hundred contractile protein m…
a myofilament about 11 nm in diameter composed of bundles myo…
Myglobin
an oxygen-storing red pigment of muscle
Myofibril
a bundle of protein microfilaments (myofilaments)
9 terms
a&p lab skeletal muscle fiber model
endomysium
sarcolemma
sarcoplasm
nuceli
(6) thin covering on the outside of each muscle fiber
(5) cell membrane of muscle
(1) like cytoplasm in muscle
(2) center of muscle fiber
endomysium
(6) thin covering on the outside of each muscle fiber
sarcolemma
(5) cell membrane of muscle
9 terms
Internal Structure of a Muscle Fiber
myofibrils
myofilaments
light I bands
dark A bands
lengthwise threads inside and extend the entire length of the…
- think filament composed primarily of actin... - thick filament…
contain only thin filaments
contain entire thick filaments
myofibrils
lengthwise threads inside and extend the entire length of the…
myofilaments
- think filament composed primarily of actin... - thick filament…
10 terms
Sequence of Excitation of a Muscle Fiber
A nerve impulse arrives at what juncti…
What is released from the motor neuron…
A propagated action potential travels…
The propagated action potential trigge…
neuromuscular
acetylchloine
length of sacrolemma
Ca2+ into sarcoplasm
A nerve impulse arrives at what juncti…
neuromuscular
What is released from the motor neuron…
acetylchloine
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