Muscular System

Question 1

which type of muscle is not striated

Answer 1

smooth muscles

Question 2

which muscle cell has the largest fiber diameter

Answer 2

skeletal muscle

Question 3

which is the only muscle cell without a centrally located nuclei

Answer 3

skeletal muscle

Question 4

which has the largest amount of sarcoplasmic reticulum

Answer 4

skeletal muscle

Question 5

which muscle cell has no transverse tubules

Answer 5

smooth muscle

Question 6

which muscle has transverse tubule aligned with z disc

Answer 6

cardiac muscle

Question 7

which type of muscle has cell junctions

Answer 7

cardiac muscles

Question 8

what muscle has endomysium, perimysium and epimysium as connective tissue component

Answer 8

skeletal muscle

Question 9

what are the connective tissue components of cardiac muscles

Answer 9

endomysium and perimysium

Question 10

what is the connective tissue component of smooth muscles

Answer 10

endomysium

Question 11

which muscle tissues are striated

Answer 11

cardiac and skeletal tissue

Question 12

which mucle cell has many nuclei

Answer 12

skeletal muscle

Question 13

which muscle tissue contract voluntarily

Answer 13

skeletal muscle

Question 14

what are striations

Answer 14

alternating dark and light bands

Question 15

refers to the self induced impulse of the cardiac muscles

Answer 15

auto rhythmicity

Question 16

connective tissue which is the outermost layer of the muscle, present only in skeletal muscle

Answer 16

epimysium

Question 17

connective tissue that surrounds groups of 10 to 100 or more muscle fibers separating them into bundles

Answer 17

perimysium

Question 18

a bundle of 10-100 muscle fibers separated by perimysium

Answer 18

fascicles

Question 19

a thin sheath of areolar connective tissue that penetrates the interior of each fascicle and separates individual muscle fibers from one another, present in all muscles

Answer 19

endomysium

Question 20

a cord of dense regular connective tissue composed of parallel bundles of collagen fibers that attach a muscle to the periosteum of a bone

Answer 20

tendon

Question 21

the plasma membrane of a muscle fiber

Answer 21

sarcolemma

Question 22

cytoplasm of a muscle fiber

Answer 22

sarcoplasm

Question 23

continually pumps Calcium ions from the sarcoplasm and stores it within its sacs

Answer 23

sarcoplasmic reticulum

Question 24

allow electrical signals or impulses to move deeper into the cell

Answer 24

T tubules

Question 25

produces ATP and is most numerous in skeletal muscle tissue

Answer 25

mitochondria

Question 26

contains thousands of thick and thin myofilaments that extend lengthwise along the skeletal muscle fibers and almost all fill their sarcoplasm

Answer 26

myofibrils

Question 27

thick filament

Answer 27

myosin

Question 28

thin filaments

Answer 28

actin, tropomyosin and troponin

Question 29

when myosin heads bridge the gap between adjacent myofilaments, they are called

Answer 29

cross bridges

Question 30

basic contractile unit of the muscle cell

Answer 30

sarcomere

Question 31

narrow plate-shaped regions of dense materials that separate one sarcomere from the next

Answer 31

Z discs

Question 32

the region in the center of H zone that contains proteins that hold thick filaments together at the center of the sarcomere

Answer 32

M Line

Question 33

the segment that runs the entire length of the thick filament, and includes parts of thin filament that overlap thick filament

Answer 33

A band

Question 34

the segment that includes the Z line and the ends of the thin filaments where they do not overlap the thick filaments

Answer 34

I band

Question 35

narrow region in the center of each A band that contains thick filaments but no thin filaments

Answer 35

H Zone

Question 36

stabilizes the position of the thick filament and can stretch and spring back due to its size

Answer 36

titin

Question 37

structural protein that attaches to actin molecules of thin filaments

Answer 37

a actinin

Question 38

form the m line of the sarcomere, binds to titin

Answer 38

myomesin

Question 39

long non elastic protein wrapped around each thin filament

Answer 39

nebulin

Question 40

anchors the muscle fibers to the surrounding matrix, holds the actin filaments to the sarcolemma

Answer 40

dystotrophin