Muscle Anatomy Flashcards

Flashcards for muscle anatomy and function based on lecture notes.

What is a muscle fiber?

Muscle cell

What are myofibrils?

Rods inside muscle fibers that contract

Which proteins slide to make muscles move?

Actin and Myosin

What is a sarcomere?

Unit of contraction

What connects muscle to bone?

Tendon

What is the origin of a muscle?

Where muscle starts (doesn't move)

What is the insertion of a muscle?

Where muscle ends (moves)

Where is skeletal muscle located and is it voluntary or involuntary?

Attached to bones, Voluntary

Where is cardiac muscle located and is it voluntary or involuntary?

Heart only, Involuntary

Where is smooth muscle located and is it voluntary or involuntary?

Organs, Involuntary

What is a key feature of skeletal muscle?

Striated (striped), fast

What is a key feature of cardiac muscle?

Striated, rhythmic

What is a key feature of smooth muscle?

Not striated, slow

What muscle lifts your arm?

Deltoid

What is the location of the deltoid muscle?

Shoulder

What is the action of the deltoid muscle?

Lifts arm

What muscle bends your elbow?

Biceps brachii

What is the location of the biceps brachii muscle?

Front of upper arm

What is the action of the biceps brachii muscle?

Bends elbow

What muscle straightens your elbow?

Triceps brachii

What is the location of the triceps brachii muscle?

Back of upper arm

What is the action of the triceps brachii muscle?

Straightens elbow

What is the location of the pectoralis major muscle?

Chest

What is the action of the pectoralis major muscle?

Pushes arms forward

What is the action of the rectus abdominis muscle?

Flexes spine

What is the location of the rectus abdominis muscle?

Abs

What is the location of the gluteus maximus muscle?

Butt

What is the action of the gluteus maximus muscle?

Extends hip

What is the location of the quadriceps muscle?

Front thigh

What is the action of the quadriceps muscle?

Straightens knee

What is the location of the hamstrings muscle?

Back thigh

What is the action of the hamstring muscles?

Bends knee

What is the location of the gastrocnemius muscle?

Calf

What is the action of the gastrocnemius muscle?

Points toes