Ch 9 Lec 1 - Muscles Flashcards Preview

Anatomy > Ch 9 Lec 1 - Muscles > Flashcards

Flashcards in Ch 9 Lec 1 - Muscles Deck (67):
1

study of muscles

myology

2

muscular tissue is blank percent of total body mass

45

3

muscles do most of the blank generated by the body

work

4

three muscle functions

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

5

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

excitability

6

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

contractility

7

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

extensibility

8

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

elasticity

9

four properties of muscle tissue

excitability, contractility, extensibility, elasticity

10

muscles are blank

organs

11

muscle is composed of many types of blank

tissue

12

a muscle fiber equals blank

1 muscle cell

13

skeletal muscle attaches to bone, skin, or blank

fascia

14

skeletal muscle blanks rapidly but blanks easilty

contracts, tires

15

another name for belly

gaster

16

main portion of a muscle

gaster

17

belly is attached to blank

tendons

18

tendons attach blank to blank

bone, muscle

19

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

deep

20

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

subcutaneous

21

many muscle fibers are bundled together into groups called blank

fascicles

22

several blank make up a muscle

fascicle

23

fascicles have blank to blank fibers

10-100

24

skeletal muscle ct that surrounds the whole muscle

epimysium

25

skeletal muscle ct that surrounds fascicles

perimysium

26

skeletal muscle ct that separates individual muscle fibers

endomysium

27

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

belly, tendon

28

tendons may form thick flattened sheets, called blank

aponeuroses

29

embryonic cells that fuse to form muscle fibers

myoblasts

30

these are the reason that muscles are so long and multinucleated

myoblasts

31

myoblasts that do not fuse become blank cells

myosatellite

32

these muscle fiber cells assist in repair of damaged cells

myosatellite

33

fiber cytoplasm of a muscle fiber

sarcoplasm

34

plasma membrane of a muscle fiber

sarcolemma

35

extensions of the sarcolemma into the sarcoplasm in muscle fibers

transverse tubule

36

contractile organelles that extend the length of a muscle fiber

myofibrils

37

myofibrils are surrounded by the blank

sarcoplasmic reticulum

38

the functional unit of a myofibril is a blank

sarcomere

39

sarcomeres are made of blank filaments and blank filaments

thick, thin

40

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

myosin

41

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

actin

42

actin binds with blank because it has an active site

myosin

43

two regulatory proteins of actin

tropomyosin, troponin

44

the striated bands of filaments are blank

sarcomeres

45

entire thick filament range

A band

46

only thin filaments

I band

47

only thick filaments

H bands

48

both filaments are in this zone

zone of overlap

49

divide and flank the sarcomere

sarcomere lines

50

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

z line

51

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

m line

52

diagram a sarcomere

ehhh

53

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

titin

54

structural protein that holds F actin together on thin filaments

nebulin

55

structural protein that makes up the z line

actinin

56

during contraction, myosin attaches to binding site of blank

actin

57

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

actin

58

the blank filaments slide inward during contraction

thin

59

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

motor unit

60

three things in neuromuscular junciton

motor unit, neuromuscular junction, synaptic terminal

61

point of contact between the neuron and the muscle

neuromuscular junction

62

end of axon that contacts motor end plate

synaptic terminal

63

three more parts of the neuromuscular junction

motor end plate, synaptic cleft, neurotransmitter

64

point on muscle fiber that contacts synaptic terminal

motor end plate

65

chemical released into the gap in neuromuscular junction

neurotransmitter

66

gap between motor end plates in neuromuscular junction

synaptic cleft

67

neurotransmitter involved in neuromuscular junction

acetylcholine