Muscle

Front 1

What are the 3 types of muscles?

Back 1

skeletal-voluntary, cardiac-invol.,smooth-invol.

Front 2

2 proteins that the muscle is composed of:

Back 2

actin and myosin

Front 3

this covering surrounds the whole muscle and is made from dense irregular

Back 3

epimysium

Front 4

a group of muscle fibers, inside of these is muscle cells or fibers

Back 4

fascicle

Front 5

this covers around fasicle?

Back 5

perimysium

Front 6

long cylindrical, multinucleate found within the fascicle

Back 6

muscle fiber or cell

Front 7

plasma membrane of muscle fiber

Back 7

sarcolemma

Front 8

this is the cytoplasm of muscle

Back 8

sarcoplasm

Front 9

this is a structure within the muscle fiber and is made from actin and myosin

Back 9

myofibrils

Front 10

connective tissue that surrounds each muscle fiber

Back 10

endomysium

Front 11

each muscle contains a ____ and a ____ each entering and exiting at the same place

Back 11

nerve and artery/veins

Front 12

these are contorted when muscle is relaxed or contracted

Back 12

capillaries

Front 13

when ____ the muscle shortens
when____ the muscle is long

Back 13

contracted
relaxed

Front 14

these are sticks of protein

Back 14

myofibrils

Front 15

which band is thicker A band or I band

Back 15

A band

Front 16

this band changes during contraction

Back 16

I band

Front 17

this zone is lighter strip in middle of A band...relaxed muscle only

Back 17

H zone

Front 18

this line bisects H zone and A band

Back 18

M line

Front 19

this disc bisects I band

Back 19

Z disc

Front 20

this is the region between Z disc

Back 20

sarcomere

Front 21

the thick filaments form the length of the __ band

Back 21

A

Front 22

the thin filametns form the length of the __ band

Back 22

I

Front 23

this protein forms the Z disc, anchors thin filaments

Back 23

nebulin

Front 24

fine protein strands that form M line, hold adjacent thick filaments together

Back 24

desmin

Front 25

this protein has two heads and 2 twisted tails

Back 25

myosin

Front 26

the heads have two purposes what are they?

Back 26

bind w/ actin
ATP

Front 27

has a twisted double strand and stiffened by two strands of tropomyosin-blocks active site for myosin

Back 27

actin

Front 28

Tropomin has three proteins that make it up what are they and what does each one do?

Back 28

TnI-bonds actin
TnC-binds calcium ions
TnT-binds to tropomyosin and positions it on actin

Front 29

this surrounds each myofibril, network of tubules,terminal cisternea

Back 29

sarcoplasmic reticulum

Front 30

terminal cisternea releases

Back 30

Ca

Front 31

these are wrapped around each myofibril and conduct nerve impulses

Back 31

t-tubules or transverse tubules