Differences between Cardiac and Skeleton Muscle (copy)

How many nuclei do cardiac muscle cells have?

mononucleated

How many nuclei do skeletal muscle cells have?

multinucleated

Which muscle type has more mitochondria?

cardiac

Which muscle type has fewer mitochondria?

skeletal

Where are T-tubules located in cardiac muscle?

short, broad T-tubules at the Z-line/disc

Where are T-tubules located in skeletal muscle?

a-i junction

Does cardiac muscle have terminal cisternae in SR?

no

Does skeletal muscle have terminal cisternae in SR?

yes

What is the typical length of a cardiac muscle fiber?

short, about 50–100 micrometers

What is the typical length of a skeletal muscle fiber?

long, up to 30 centimeters

Do cardiac muscle fibers have intercalated discs?

yes

Do skeletal muscle fibers have intercalated discs?

no

Are cardiac muscle fibers branched?

yes

Are skeletal muscle fibers branched?

no, straight

Is cardiac muscle contraction voluntary or involuntary?

involuntary with autorhymiticity

Is skeletal muscle contraction voluntary or involuntary?

voluntary

What cell-to-cell junctions are present in cardiac muscle?

gap junctions and desmosomes