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PBD Quiz 4
UFCOP
8
Medical
Graduate
09/24/2008

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Term
Describe skeletal, smooth, and cardiac muscle. (multi/mononucleated etc.)
Definition
Skeletal- Striated, multinucleated, voluntary
Smooth- Non-striated, mononucleated, involuntary
Cardiac- Non-striated, mononucleated, involuntary
Term
What types of muscle contain gap junctions?
Definition
Cardiac
Term
What is a bundle of muscle cells?

What is the name for the cell membrane plus the outer coat?
Definition
Fasiciulus

Sarcolemma
Term
What is the contractile element of muscle fibers?

What is the individual unit of a muscle fiber involved in contraction?
Definition
Myofibril

Sarcomere
Term
Which protein involved in contraction has ATPase activity?
Definition
Myosin head
Term
What are the three components of the actin filament?
Definition
1) F-actin
2) Tropomyosin
3) Troponin
Term
What physically covers actin active sites during the resting state?
Definition
Tropomyosin
Term
What is composed of three globular proteins and has strong affinity for actin, tropomyosin, and Ca ions?
Definition
Troponin
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