muscle(skeletal, cardiac, and smooth)

what are the 3 types of muscle

• skeletal

• cardiac

• smooth

what does the presence of muscle allow the body to do

• movement

• maintenance of posture

• joint stabilization

• heat generation

what are special characteristics of muscle

• contractility

• excitability

• extensibility

• elasticity

from smallest to largest list the make up of muscles

• sarcomere

• myofibrils

• myofibers

• muscle fiber

what are the myofilaments

• actin

• myosin

• troponin

• tropomyosin

what surrounds large muscle bundles

epimysium

smaller muscle bundles surrounded by a perimysium are called what

fasicles

individual muscle fibers are surrounded by what

endomysium

what is the plasma membrane for a muscle fiber called

sarcolema

what is the cytoplasm of a muscle fiber called

sarcoplasam

what are t- tubules

invaginations of the sarcolemma that communicate the action potentials to the sarcoplasmic reticulum

what two muscle types have striations

• skeletal

• cardiac

in skeletal muscle what denotes the end of a sarcomere

the z disk

in contraction what ion is needed in order to allow myosin to bind to actin

calcium

where is calcium stored in the muscle

It is stored in the sarcoplasmic reticulum

what types of skeletal muscle are there

• oxidative

• glycolytic

what are oxidative fibers known as

slow fibers

what are glycolytic fibers know as

fast fibers

where is the only place cardiac muscle is located

in the heart

how are fibers joined in the heart

they are joined through intercalated disks

what is the main difference between cardiac and skeletal muscle

cardiac muscle is single nucleated

in the heart what fibers are joined by desmosomes instead of intercalated discs

purkinje fibers