Ch 9 Lec 1 - Muscles

Question 1

study of muscles

Answer 1

myology

Question 2

muscular tissue is blank percent of total body mass

Answer 2

45

Question 3

muscles do most of the blank generated by the body

Answer 3

work

Question 4

three muscle functions

Answer 4

maintain posture, movement, heat production, support visceral organs, guard orifices

Question 5

property of muscle tissue that has the ability to receive and respond to electric or chemical stimuli

Answer 5

excitability

Question 6

property of muscle that is the ability to shorten forcibly when stimulated

Answer 6

contractility

Question 7

property of muscle that has the ability to be stretched without damaging the tissue

Answer 7

extensibility

Question 8

property of muscle tissue that is the ability to return to original shape after being stretched

Answer 8

elasticity

Question 9

four properties of muscle tissue

Answer 9

excitability, contractility, extensibility, elasticity

Question 10

muscles are blank

Answer 10

organs

Question 11

muscle is composed of many types of blank

Answer 11

tissue

Question 12

a muscle fiber equals blank

Answer 12

1 muscle cell

Question 13

skeletal muscle attaches to bone, skin, or blank

Answer 13

fascia

Question 14

skeletal muscle blanks rapidly but blanks easilty

Answer 14

contracts, tires

Question 15

another name for belly

Answer 15

gaster

Question 16

main portion of a muscle

Answer 16

gaster

Question 17

belly is attached to blank

Answer 17

tendons

Question 18

tendons attach blank to blank

Answer 18

bone, muscle

Question 19

fascia that is dense irregular ct around the muscle and holds it in place and separates it from other muscles

Answer 19

deep

Question 20

fascia that is made of loose ct beneath skin, surrounds several muscles

Answer 20

subcutaneous

Question 21

many muscle fibers are bundled together into groups called blank

Answer 21

fascicles

Question 22

several blank make up a muscle

Answer 22

fascicle

Question 23

fascicles have blank to blank fibers

Answer 23

10-100

Question 24

skeletal muscle ct that surrounds the whole muscle

Answer 24

epimysium

Question 25

skeletal muscle ct that surrounds fascicles

Answer 25

perimysium

Question 26

skeletal muscle ct that separates individual muscle fibers

Answer 26

endomysium

Question 27

all connective tissue extend beyond the muscle blank to form the blank

Answer 27

belly, tendon

Question 28

tendons may form thick flattened sheets, called blank

Answer 28

aponeuroses

Question 29

embryonic cells that fuse to form muscle fibers

Answer 29

myoblasts

Question 30

these are the reason that muscles are so long and multinucleated

Answer 30

myoblasts

Question 31

myoblasts that do not fuse become blank cells

Answer 31

myosatellite

Question 32

these muscle fiber cells assist in repair of damaged cells

Answer 32

myosatellite

Question 33

fiber cytoplasm of a muscle fiber

Answer 33

sarcoplasm

Question 34

plasma membrane of a muscle fiber

Answer 34

sarcolemma

Question 35

extensions of the sarcolemma into the sarcoplasm in muscle fibers

Answer 35

transverse tubule

Question 36

contractile organelles that extend the length of a muscle fiber

Answer 36

myofibrils

Question 37

myofibrils are surrounded by the blank

Answer 37

sarcoplasmic reticulum

Question 38

the functional unit of a myofibril is a blank

Answer 38

sarcomere

Question 39

sarcomeres are made of blank filaments and blank filaments

Answer 39

thick, thin

Question 40

thick filament that is twisted with globular heads, about 1.6 micrometers long, and there are 500 of them to one thick filament

Answer 40

myosin

Question 41

thin filaments are made of blank which is a structural protein and has coiled "beads"

Answer 41

actin

Question 42

actin binds with blank because it has an active site

Answer 42

myosin

Question 43

two regulatory proteins of actin

Answer 43

tropomyosin, troponin

Question 44

the striated bands of filaments are blank

Answer 44

sarcomeres

Question 45

entire thick filament range

Answer 45

A band

Question 46

only thin filaments

Answer 46

I band

Question 47

only thick filaments

Answer 47

H bands

Question 48

both filaments are in this zone

Answer 48

zone of overlap

Question 49

divide and flank the sarcomere

Answer 49

sarcomere lines

Question 50

the end of the sarcomere made of actinin protein and anchor thin filaments

Answer 50

z line

Question 51

middle of the sarcomere that stabilizes thick filaments and is a sarcomere line

Answer 51

m line

Question 52

diagram a sarcomere

Answer 52

ehhh

Question 53

structural protein that anchors a thick filament to a z line and accounts for elasticity and extensibility

Answer 53

titin

Question 54

structural protein that holds F actin together on thin filaments

Answer 54

nebulin

Question 55

structural protein that makes up the z line

Answer 55

actinin

Question 56

during contraction, myosin attaches to binding site of blank

Answer 56

actin

Question 57

during contraction, atp causes the myosin to flex and pull on the blank

Answer 57

actin

Question 58

the blank filaments slide inward during contraction

Answer 58

thin

Question 59

neuron and all muscle cells are stimulated by the neuron in this

Answer 59

motor unit

Question 60

three things in neuromuscular junciton

Answer 60

motor unit, neuromuscular junction, synaptic terminal

Question 61

point of contact between the neuron and the muscle

Answer 61

neuromuscular junction

Question 62

end of axon that contacts motor end plate

Answer 62

synaptic terminal

Question 63

three more parts of the neuromuscular junction

Answer 63

motor end plate, synaptic cleft, neurotransmitter

Question 64

point on muscle fiber that contacts synaptic terminal

Answer 64

motor end plate

Question 65

chemical released into the gap in neuromuscular junction

Answer 65

neurotransmitter

Question 66

gap between motor end plates in neuromuscular junction

Answer 66

synaptic cleft

Question 67

neurotransmitter involved in neuromuscular junction

Answer 67

acetylcholine