5: Muscle

Question 1

Striated muscle

Answer 1

regular arrangement of actin and myosin filaments gives a highly ordered appearance

Question 2

What 2 types of muscle are striated?

Answer 2

skeletal and cardiac

Question 3

Smooth muscle

Answer 3

in walls of tubular organs and blood vessels, not striated

Question 4

Sarcoplasm

Answer 4

cytoplasm of muscle

Question 5

Sarcoplasmic reticulum

Answer 5

endoplasmic reticulum of muscle

Question 6

Sarcolemma

Answer 6

plasmalemma of muscle

Question 7

T/F: Skeletal muscle is multinucleated

Answer 7

T

Question 8

Sarcomere

Answer 8

functional unit of muscle

Question 9

Order from smallest to largest of muscle arrangements

Answer 9

myofilament, sarcomere, myofibril, muscle fiber, fascicle, muscle

Question 10

A-bands

Answer 10

dark

Question 11

I-band

Answer 11

light

Question 12

What are located between the myofibrils throughout the muscle fiber?

Answer 12

mitochondria and glycogen granules

Question 13

What is between z-lines?

Answer 13

sarcomere

Question 14

Triad

Answer 14

2 components of sarcoplasmic reticulum and T tubule

Question 15

Epimysium

Answer 15

surrounds entire muscle tissue

Question 16

Endomysium

Answer 16

covers each single muscle fiber

Question 17

Perimysium

Answer 17

surrounds each bundle of muscle fibers

Question 18

Where are fibroblasts located?

Answer 18

endomysium

Question 19

Motor end plates

Answer 19

specialized areas where axon branches of somatic efferent neurons make synaptic contact with muscle fibers

Question 20

Junctional folds

Answer 20

increases surface area due to the sarcolemma being highly folded

Question 21

Motor unit

Answer 21

the muscle fiber innervated by 1 neuron

Question 22

Muscle spindles

Answer 22

specialized muscle receptors that sense degree of stretch

Question 23

Intrafusual fibers

Answer 23

connective tissue capsule surrounding a few muscle fibers

Question 24

T/F: Cardiac muscle is smaller than skeletal muscle

Answer 24

T

Question 25

Where are T tubules located in cardiac muscle?

Answer 25

z-lines rather than A-I junction

Question 26

Diads

Answer 26

1 T-tubule and one SR cisternae

Question 27

Intercalated disks

Answer 27

in cardiac muscle to connect adjacent cells and allow communication

Question 28

Where is smooth muscle located?

Answer 28

arteries, GI tract, reproductive tract, iris of eye

Question 29

Caveolae

Answer 29

vesicles with receptors and ion channels located near SR

Question 30

Dense bodies

Answer 30

dark staining patches in the cytoplasm and along the cell membrane

Question 31

What serves as anchor point for actin filaments and intermediate filaments?

Answer 31

dense bodies

Question 32

What type of junction is found between adjacent muscle cells?

Answer 32

gap junctions