Human Anatomy - Microscopic Muscle Model

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12 Terms

1
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myofibrils

1; thin strands within a single muscle fiber that bundle the skeletal muscle protein filaments and span the length of the fiber

<p>1; thin strands within a single muscle fiber that bundle the skeletal muscle protein filaments and span the length of the fiber</p>
2
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mitochondrium

2; organelle where cellular respiration occurs and most ATP is generated

<p>2; organelle where cellular respiration occurs and most ATP is generated</p>
3
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nucleus

8

<p>8</p>
4
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actin filaments

9; thin filaments

<p>9; thin filaments</p>
5
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sarcomere

10; one contractile unit of a muscle fiber

<p>10; one contractile unit of a muscle fiber</p>
6
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myosin filaments

11; thick filaments

<p>11; thick filaments</p>
7
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sarcolemma

14; plasma membrane of a muscle fiber

<p>14; plasma membrane of a muscle fiber</p>
8
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t-tubule

15; narrow tubes that are continuous with the sarcolemma and extend into the sarcoplasm

<p>15; narrow tubes that are continuous with the sarcolemma and extend into the sarcoplasm</p>
9
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sarcoplasmic reticulum

17; Organelle of the muscle fiber that stores calcium.

<p>17; Organelle of the muscle fiber that stores calcium.</p>
10
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Z-line

20; the line formed by the attachment of actin filaments between two sarcomeres of a muscle fiber in striated muscle cells

<p>20; the line formed by the attachment of actin filaments between two sarcomeres of a muscle fiber in striated muscle cells</p>
11
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I-band

21; light band, composed of thin actin filaments

<p>21; light band, composed of thin actin filaments</p>
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A-band

22; Dark band, composed of thick myosin filaments overlapping with thin actin filaments

<p>22; Dark band, composed of thick myosin filaments overlapping with thin actin filaments</p>

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