Muscle Tissue

Question 1

Muscle tissue is of 2 types. __________ and ___________. fill in the blanks.

Answer 1

striated and non striated

Question 2

name the 2 types of striated muscle tissue found in the body.

Answer 2

skeletal and cardiac muscle tissue.

Question 3

name the 1 type of non striated muscle tissue found in the body.

Answer 3

smooth muscle.

Question 4

what is the Functional Classification of Skeletal Muscles?

Answer 4

1.The axial and appendicular
muscle
2.Visceral Striated Muscle

Question 5

what is Visceral Striated
Muscle?

Answer 5

muscular tissues that are found in the internal organs of the body.

Question 6

cardiac contractions are involuntary. true or false?

Answer 6

true

Question 7

what are satellite cells in skeletal muscle?

Answer 7

Satellite cells are the primary stem cells in adult skeletal muscle and are responsible for postnatal muscle growth, hypertrophy and regeneration

Question 8

name the 3 Types of Connective Tissue in Skeletal Muscles.

Answer 8

There are three types:
1. Endomysium - muscle fiber
2. Perimysium - muscle fascicle
3. Epimysium - entire muscle

Question 9

endomysium is Loose connective tissue that
surrounds individual muscle fibers. true or false.

Answer 9

true

Question 10

perimysium contains Collagen and elastic fibers surrounding a group of muscle fibers called a fascicle. true or false?

Answer 10

true.

Question 11

epimysium is Dense regular connective tissue surrounding entire muscle. true or false?

Answer 11

true

Question 12

what are the types of skeletal muscle
fibers?

Answer 12

1. Red fibers
2. Intermediate fibers
3. White fibers

Question 13

which type of fiber is found in marathon runners?
1. Red fibers
2. Intermediate fibers
3. White fibers

Answer 13

red fiber

Question 14

which type of fiber is found in hockey players and swimmers?
1. Red fibers
2. Intermediate fibers
3. White fibers

Answer 14

intermediate fibers

Question 15

which type of fiber is found in the weight lifters and sprinters?
1. Red fibers
2. Intermediate fibers
3. White fibers

Answer 15

white fibers

Question 16

what is a triad?

Answer 16

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.

Question 17

myofilament —-> myofibril —–> muscle fiber ——> fascicle —-> muscle. is this order correct?

Answer 17

yes

Question 18

what is the basic unit of a muscle fiber?

Answer 18

sarcomere

Question 19

I band consists of?

Answer 19

I-band: actin filaments

Question 20

A band consists of?

Answer 20

A-band: myosin filaments which may overlap with actin filaments

Question 21

H zone consists of?

Answer 21

H-band (zone): zone of myosin filaments only

Question 22

Z disc consists of?

Answer 22

Z-line (disk): zone of apposition of actin filaments belonging to two neighbouring sarcomeres

Question 23

M line consists of?

Answer 23

M-line: band of connections between myosin filaments

Question 24

Actin is thin filament. true or false?

Answer 24

true

Question 25

myosin is thick filament. true or false?

Answer 25

true

Question 26

nebulin is an accessory protein. is that correct?

Answer 26

yes

Question 27

Each contraction cycle consist of five stages 1. Attachment 2. Release 3. Bending (Twisting) 4. Force Generation 5. Reattachment is this order correct?

Answer 27

yes

Question 28

what are the components which form neuromuscular junction?

Answer 28

* 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

Question 29

what is myasthenia gravis?

Answer 29

myasthenia gravis is an autoimmune disease caused by the reduced number of functional ACh receptor sites.

Question 30

give the 3 symptoms of myasthenia gravis.

Answer 30

smoothing out of forehead, eyebrow droop, droop of angle of mouth

Question 31

cardiac muscle fibers are autorythmic. what do you mean by that?

Answer 31

can generate a muscle impulse without being stimulated

Question 32

what are intercalated discs?

Answer 32

The intercalated disc represents the attachment site between cardiac muscle cells.

Question 33

what are purkinje fibers?

Answer 33

cardiac conducting fibers