Muscles And Muscle Tissue Chapter 9

Front 1

Functional characteristics of muscle tissue

Back 1

1. excitability
2. contractility
3. extensibility
4. elasticity

Front 2

Muscle functions

Back 2

1. movement
2. maintain posture
3. stabilize joints
4. generate heat

Front 3

3 types of muscle tissue

Back 3

1. cardiac
2. smooth
3. skeletal

Front 4

muscle cell is the same thing as...

Back 4

muscle fiber

Front 5

What is made up of 2 proteins actin and myosin?

Back 5

myofilaments

Front 6

What is responsible for muscle contractions?

Back 6

myofilaments

Front 7

endomysium

Back 7

surrounds individual muscle fibers with a fine sheath of connective tissue

Front 8

perimysium

Back 8

surrounds each fasicicle

Front 9

fasicicle

Back 9

bundle of nerve or muscle fibers bound together by connective tissue

Front 10

epimysium

Back 10

connective tissue that surrounds the whole muscle

Front 11

fascia

Back 11

layers of fibrous tissue covering and separating muscle: on top of epimysium

Front 12

sarcomere

Back 12

goes from z disc to z disc-smallest contractile unit of a muscle: the functional unit of a myofibril

Front 13

myofibril

Back 13

densley packed rod-like elements that makes the muscle contract

Front 14

every muscle has a nerve as well as....

Back 14

an artery and one or more veins

Front 15

nerve

Back 15

to stimulate impulse for contraction

Front 16

artery

Back 16

needs the nutrients and oxygen to contract

Front 17

veins

Back 17

takes waste products away

Front 18

myosin

Back 18

thick filament

Front 19

actin

Back 19

thin filament

Front 20

myoglobin

Back 20

oxygen binding protein

Front 21

sarcoplasm

Back 21

nonfibrillar cytoplasm of a muscle fiber

Front 22

sarcolemma

Back 22

plasma membrane surface of a muscle fiber

Front 23

connective tissue surrounding a fascicle

Back 23

perimysium

Front 24

just deep to the deep fascia

Back 24

epimysium

Front 25

contractile unit of muscle

Back 25

sarcomere

Front 26

a muscle cell

Back 26

fiber

Front 27

thin connective tissue investing each muscle cell

Back 27

endomysium

Front 28

plasma membrane of the muscle cell

Back 28

sarcolemma

Front 29

a long filamentous organelle found within muscle cells that has a banded appearance

Back 29

myofibril

Front 30

actin, myosin, or titin containing structure

Back 30

myofilament

Front 31

cordlike extension of connective tissue beyond the muscle, serving to attach it to the bone

Back 31

tendon

Front 32

a discrete bundle of muscle cells

Back 32

fasicicle

Front 33

What is a motor unit?

Back 33

a motor neuron and all the muscle fibers it supplies

Front 34

I band

Back 34

thin filaments only
(lighter)

Front 35

z disc

Back 35

dissects in the middle of the I band, sheet of protein that anchors thin myofilaments and connects myofibrils together

Front 36

A band

Back 36

extends the length of the myosin(thick)
(darker)

Front 37

each A band is divided into 3:

Back 37

2 zones of overlap(where actin and myosin overlap)

H zone- only thick myosin filaments

Front 38

regulatory subunitys that are bound to the actin

Back 38

troponin(pearl shaped)
tropomyosin(spaghetti looking)

Front 39

actin

Back 39

each actin molecule is a kidney shaped polypeptide; subunits of actin are called globular actin or G actin, bear the active sites to which the myosin heads attach

Front 40

subunits of actin

Back 40

globular actin or G actin; site of bonding during muscle contraction