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Muscles
anatomy tri 1
30
Anatomy
12th Grade
10/26/2015

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Term
What are the 3 types of muscle tissue?
Definition
Skeletal, cardiac and smooth
Term
What is similar about skeletal and cardiac tissue?
Definition
They are both elongated muscle cells called muscle fibers
Term
Muscle contraction depends on what two myofiliments?
Definition
Actin and myosin
Term
what is sarcolemma?
Definition
A muscle plasma membrane
Term
What is sarcoplasm?
Definition
the cytoplasm of a muscle cell
Term
what are 3 prefixes that refer to muscle?
Definition
Myo, Mys, sarco
Term
How does skeletal muscle contract?
Definition
Rapidly but it tires quickly
Term
what is special about cardiac muscle
Definition
it has nueral controls that allow the heart to respond to changes in bodily needs
Term
where is smooth muscle found?
Definition
in the walls of hollow organs
Term
what does smooth muscle do?
Definition
It regulates blood pressure and forces food down internal body channles
Term
what are 4 things that all muscle tissue is
Definition
excitable, contractable, extendable, and elastic
Term
what is the functions of the skeletal musscle?
Definition
it controls movement
Term
what is the function of cardiac muscle
Definition
moves blood through the body
Term
What are the 3 connective sheaths?
Definition
Endomysium, perimesium, and epimesium
Term
What is endomysium?
Definition
fine sheath with reticular fibers surrounding the muscle fibers
Term
what is perimesium
Definition
connective tissue that surrounds fascicles
Term
what is epimysium
Definition
dense regular connectibe tissue that surrounds the entire muscle
Term
what is each muscle served by?
Definition
1 nerve, 1 artery and 1 or more vein
Term
what is each skeletal muscle fiber supplied with?
Definition
a nerve ending that controls contraction
Term
what do contracting fibers require?
Definition
oxygen and nutrience from the arterys
Term
how are wastes removed?
Definition
Through the veins
Term
how many places are most skeletal muscles attached to the bone
Definition
2
Term
what 3 organells do fibers contain?
Definition
Myofibrils, sarcoplasmic reticulum and t-tubules
Term
what are myofibrils
Definition
densely packed, rodlike contractile elements
Term
what are sarcomeres?
Definition
the smallest contractile unit of a muscle
Term
What are thick filaments composed of?
Definition
Myosin with a rodlike tail and two globular heads
Term
what is troponin?
Definition
the "handles"
Term
what is tropomyosin?
Definition
the "rope"
Term
what does the sarcoplasmic reticulum do?
Definition
regulates the intacellular calcium levels
Term
what does the sarcoplasmic reticulum do?
Definition
regulates the intacellular calcium levels
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