muscle structure

The functional contractile unit within a muscle fiber is called the

• sarcomere

• fascia

• sarcoplasm

• tendon

The cytoplasm of a muscle cell is called the

• myosin

• actin

• fascia

• sarcoplasm

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

Tags

NGSS.HS-LS1-2

The unit between A and A is called

• a sarcomere

• The I band

• the Z disc

• fascia

The impulse that triggers a contraction travels deep into a muscle fiber by means of

• Sarcoplasmic reticulum

• Transverse Tubules

• Mitochondria

• Motor end Plates

What is the structure that stores the Calcium in the muscle cell.  

• Sarcoplasm
• Sarcolemma
• Sarcoplasmic Reticulum
• Myoglobin

What type of nerve causes a muscle to contract?

• motor neuron

• parasympathetic neuron

• interneuron

• sensory neuron

What are the 3 types of muscles?

• Skeletal, muscular, ligament
• Skeletal, smooth, cardiac
• Smooth, Cellular, Cerebrum
• Cardiac, smooth, brain stem