Human Anatomy: Ch.10

Excitability

irritability; ability to respond to stimulus

Conductivity

ability of a muscle to transmit electrical signal along membrane

Contractility

Ability to shorten

Extensibility

ability to lengthen

Elasticity

ability to return to resting length

Structural hierarchy of skeletal muscle

whole muscle → Muscle fascicle → muscle fiber → myofibrils → myofilaments

What do muscle fiber contain?

myofibrils

what are myofibrils are composed of?

myofilaments

thin filaments

composed of actin, tropomyosin, and troponin