Muscular System - Contractile Properties Flashcards

1
Q

What is Muscle Fibers made up of?

A

Myofibrils

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2
Q

What is Myofibrils made up of?

A

Sacomeres

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3
Q

What is Sarcomere made up of?

A

Actin and Myosin

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4
Q

What are myofibrils and what do they do?

A

Are bundles of sarcomeres that contain contractile elements which drive muscle contraction and relaxation

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5
Q

What is epimusium?

A

The epimysium is the dense connective tissue that surrounds the entire muscle tissue.

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6
Q

What are fascicles?

A

A bundle of structures, such as nerves or muscle fibers

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7
Q

What is perimysium?

A

The perimysium is the connective tissue surrounding each fiber bundle within the muscle belly

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8
Q

What is endomysium

A

endomysium represents sheets of connective tissue surrounding each independent muscle fiber.

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9
Q

What are sarcomeres?

A

A unit within the myofibril that is repsonsible for muscle contraction.

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10
Q

What three protein types are contained within a sarcomere?

A

Contractile, regulatory, and structural

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11
Q

What is the role of a contractile protein contained in a sarcomere?

A

Actin (thin filament) and myosin (thick filament) produce a contraction and shorten the sarcomere

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12
Q

What is the role of a regulatory protein contained in a sarcomere?

A

Made up of tropomyosin and troponin that allow or disallow the contractile process to take place.

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13
Q

What is the role of a structural protein contained in a sarcomere?

A

Made up of titin and myomesin that keep the contractile filaments (actin and myosin) aligned.

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14
Q

What connects 2 sarcomeres with each other?

A

Z-line or Z-disk

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