Intro to the structure of a muscle

Which muscle types are involuntary?

• cardiac

• smooth

• skeletal

Muscle cells are called

• fasicles

• fibers

• bundles

The tough connective tissue surrounding the fascicle is called

• endomysium

• perimysium

• epimysium

The cell membrane of a muscle fiber is called the

• sarcoplasm

• sarcolemma

• sarcoplasmic reticulum

the functional contractile unit within a muscle fiber is called the

• sarcomere

• fascia

• sarcoplasm

• tendon

Structure B is known as the thin filaments of the sarcomere, what is another name for the thin filaments?

• myosin

• actin

• fascia

• myofibril

Structure C is known as the thick filament of the sarcomere, it is also known as

• myosin

• actin

• fascia

• myofibrils

Structure A is on either side of the sarcomere, it is called the

• A band

• I band

• Z disc

• fascia

The unit between A and A is called

• a sarcomere

• The I band

• the Z disc

• fascia

What is the name of the connective tissue covering that covers the entire muscle organ?

• endomysium
• perimysium
• epimysium