Muscle Structure
What is the special name given to the cell membrane of a muscle cell?
Sarcolemma
Muscles are attached to bone by
Tendons
What is the primary function of the Biceps Brachii?
Flexion of the elbow
The Vastus Medialis is part of which muscle group and what is its function?
Quadriceps; knee extension
Myofibrils are composed of individual
myofilaments
Muscles are held in place and covered by
fascia
The Sternocleidomastoid muscle's function includes:
Rotation to the opposite direction and flexion of the neck
Which muscle is primarily responsible for hip extension and is a powerful extensor when climbing stairs?
Gluteus Maximus
Which structure within a muscle cell contains the contractile proteins actin and myosin?
Sarcomere
What are the three types of muscle tissue in the human body?
Cardiac, skeletal, and smooth
Which muscle is responsible for closing the eyelid?
Orbicularis Oculi
What is the primary function of the Adductor muscles?
Adduction of the thigh
Thin filaments within a muscle fiber are called
Actin
Which neurotransmitter is released at the neuromuscular junction to initiate muscle contraction?
Acetylcholine
The Masseter muscle is primarily responsible for:
Closing the jaw while chewing
The Gastrocnemius muscle is primarily responsible for:
Plantarflexion of the ankle
The connective tissue that surrounds individual fibers is:
endomysium
What is the name of the theory that explains how muscle fibers contract?
Sliding filament theory
List the Rotator Cuff Muscles
SITS - Supraspinatus, Infraspinatus, Teres Minor, Subscapularis
List the Hamstring Muscles.
Biceps Femoris, Semitendinosus, Semimembranosus