Lab 2: Muscle Tissue

What is a muscle tissue?

A contractile tissue that can shorten due to movement

What is muscle fiber?

A muscle cell

What is a muscle fiber composed of?

myofibrils

What is within the myofibrils?

myofilaments

What is the plasma membrane of a muscle cell?

The sacrolemma

What is the cytoplasm of a muscle cell?

sacroplasm

What are the three types of muscle tissue?

striated, smooth, and cardiac

What is striated muscle?

attaches to bones and has a visible pattern of myofilaments

Can we voluntarily control striated muscle?

Yes we can

What is smooth muscle?

Found within the organs and but myofilament is less regularly arranged

Can we voluntarily control smooth muscle?

No we cannot

What is cardiac muscle?

It is muscle found that is within the heart, muscle fibers interweaved each other, and have small cells

Can we voluntarily control the cardiac muscle?

No we cannot

What is the dark part of striated muscle?

the A bands

What is the light part of striated muscle?

The I band

Are cells multi or unicellular in striated muscle?

They are multicellular

Is smooth muscle multi or unicellular?

It is unicellular

Is cardiac muscle multi or unicellular?

It is both multi and unicellular

What does cardiac muscle have that all the other muscle tissues don’t?

an intercalated disc

What is the function of cardiac muscle?

To coordinate the timing to create a smooth and strong heart beat