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Human Biology > Musculoskeletal system > Flashcards

Musculoskeletal system Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Muscle cells and tissues

A

made up of muscle fibres held together by connective tissue. Contain actin and myosin filaments

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2
Q

Sarcomere

A

Alternating light and dark bands - Basic contracitle unit of muscle fibres

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3
Q

Actin Filaments

A

Thinner filaments

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4
Q

Myosin

A

Thicker Filaments

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5
Q

Sliding Filament Theory

A

Actin and Myosin can slide over one another in order to contract

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6
Q

When a stimulus is recieved by nerve cell

A

Myosin uses ATP energy to bind and pull on actin. Actin filaments slide over thick myosin filaments. Causes sarcomere to shorten

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7
Q

When stimulus stops

A

Myosin and Actin Detach. Muscle relaxes

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8
Q

Skeletal Muscles

A

Attached by bones to tendons. Can pull but not push bones together. paired t perform in antagonistic pairs

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9
Q

Agonist

A

Muscle that brings about desired movement

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10
Q

Antagonist

A

Brings about the movement opposite to the agonist

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Human Biology (12 decks)

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