Muscle Tissue Flashcards
Muscle tissue is of 2 types. __________ and ___________. fill in the blanks.
striated and non striated
name the 2 types of striated muscle tissue found in the body.
skeletal and cardiac muscle tissue.
name the 1 type of non striated muscle tissue found in the body.
smooth muscle.
what is the Functional Classification of Skeletal Muscles?
1.The axial and appendicular
muscle
2.Visceral Striated Muscle
what is Visceral Striated
Muscle?
muscular tissues that are found in the internal organs of the body.
cardiac contractions are involuntary. true or false?
true
what are satellite cells in skeletal muscle?
Satellite cells are the primary stem cells in adult skeletal muscle and are responsible for postnatal muscle growth, hypertrophy and regeneration
name the 3 Types of Connective Tissue in Skeletal Muscles.
There are three types:
1. Endomysium - muscle fiber
2. Perimysium - muscle fascicle
3. Epimysium - entire muscle
endomysium is Loose connective tissue that
surrounds individual muscle fibers. true or false.
true
perimysium contains Collagen and elastic fibers surrounding a group of muscle fibers called a fascicle. true or false?
true.
epimysium is Dense regular connective tissue surrounding entire muscle. true or false?
true
what are the types of skeletal muscle
fibers?
- Red fibers
- Intermediate fibers
- White fibers
which type of fiber is found in marathon runners?
1. Red fibers
2. Intermediate fibers
3. White fibers
red fiber
which type of fiber is found in hockey players and swimmers?
1. Red fibers
2. Intermediate fibers
3. White fibers
intermediate fibers
which type of fiber is found in the weight lifters and sprinters?
1. Red fibers
2. Intermediate fibers
3. White fibers
white fibers
what is a triad?
A complex of 2 terminal cistern and an intervening T tubule constitutes a triad. Triads are important in initiating muscle contraction.
TRIAD = 2 TERMINAL CISTERN + TRANSVERSE TUBULE.
myofilament —-> myofibril —–> muscle fiber ——> fascicle —-> muscle. is this order correct?
yes
what is the basic unit of a muscle fiber?
sarcomere
I band consists of?
I-band: actin filaments
A band consists of?
A-band: myosin filaments which may overlap with actin filaments
H zone consists of?
H-band (zone): zone of myosin filaments only
Z disc consists of?
Z-line (disk): zone of apposition of actin filaments belonging to two neighbouring sarcomeres
M line consists of?
M-line: band of connections between myosin filaments
Actin is thin filament. true or false?
true
myosin is thick filament. true or false?
true
nebulin is an accessory protein. is that correct?
yes
Each contraction cycle consist of five stages
1. Attachment
2. Release
3. Bending (Twisting)
4. Force Generation
5. Reattachment
is this order correct?
yes
what are the components which form neuromuscular junction?
- The neuromuscular junction is formed by :
1. End of motor neuron axon (axon terminal)
2. Synaptic cleft
3. The motor end
plate of a muscle
what is myasthenia gravis?
myasthenia gravis is an autoimmune disease caused by the reduced number of functional ACh receptor sites.
give the 3 symptoms of myasthenia gravis.
smoothing out of forehead, eyebrow droop, droop of angle of mouth
cardiac muscle fibers are autorythmic. what do you mean by that?
can generate a muscle impulse without being stimulated
what are intercalated discs?
The intercalated disc represents the attachment site between cardiac muscle cells.
what are purkinje fibers?
cardiac conducting fibers
