Muscles test (Anatomy)

Excitability

• Muscles ability to respond to Stimuli

  (ex. motor neurons electricity)

• Example: when your motor neurons deliver an impulse to your biceps brachii. it contracts

Contractility

• Muscles ability to shorten

• Example: when you flex your elbow joint, your biceps brachii gets shorter

Extensibility

• Muscles ability to be stretched without tearing

• Example: A gymnast does a split

• memory hook - it extends

Elasticity

• Muscles ability to return to its original shape

• Example: After you stretch your muscles, they don’t stay in that longer state. After you contact your muscles , they don’t stay in a shorter state.

Muscle

• the organ example: biceps brachii

• Made up of fascicles

Endomysium

• CT sheath that surrounded each muscle fiber

Sarcolemma

• plasma membrane around each muscle fiber

• below endomysium

Myofibril

• long proteins that make up each muscle fiber

Myofilaments

• make up sarcomeres

• action and myosin

  actin- thin

  myosin- thick

tendon

• connects skeletal muscle to your bone

epimysium

• CT sheath that surrounded the entire muscle

Perimysium

• CT sheath that surrounded each fascicles

fascicle

• A bundle of muscle fibers

Muscle fiber

• Muscle cell

• Made up of many myofibrils

sarcomere

• line up to form myofibers where contraction happens

what type of tissue connects skeletal bones?

tendon

when a muscle contracts, where does it begin or happen at ?

sarcomere

which myofilaments is thin?

actin

which myofilament is thick?

myosin

what is another word for muscle cell?

muscle fiber

if you bundle up many fibers and wrap them together with a perimysium, you get…

epimysium

if you bundle up many fascicles and wrap them together with an epimysium you get…

muscle

if you bundle up many myofibrils and wrap them together with an endomysium you get…

muscle fibers