Unit 5: Vocab Quiz 2

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12 Terms

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cross bridges

myosin head, which connects thick filaments and thin filaments during a contraction

<p>myosin head, which connects thick filaments and thin filaments during a contraction</p>
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sliding filament theory

the concept that a sarcomere shortens as the thick and thin filaments slide past one another

<p>the concept that a sarcomere shortens as the thick and thin filaments slide past one another</p>
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motor unit

a motor neuron and all the muscle cells it stimulates

<p>a motor neuron and all the muscle cells it stimulates</p>
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neuromuscular junction

point of contact between a motor neuron and a skeletal muscle cell

<p>point of contact between a motor neuron and a skeletal muscle cell</p>
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Acetylcholine

A neurotransmitter that enables learning and memory and also triggers muscle contraction

<p>A neurotransmitter that enables learning and memory and also triggers muscle contraction</p>
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action potential

a neural impulse; a brief electrical charge that travels down an axon

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troponin

A protein of muscle that together with tropomyosin forms a regulatory protein complex controlling the interaction of actin and myosin and that when combined with calcium ions permits muscular contraction

<p>A protein of muscle that together with tropomyosin forms a regulatory protein complex controlling the interaction of actin and myosin and that when combined with calcium ions permits muscular contraction</p>
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tropomyosin

A protein of muscle that forms a complex with troponin regulating the interaction of actin and myosin in muscular contraction

<p>A protein of muscle that forms a complex with troponin regulating the interaction of actin and myosin in muscular contraction</p>
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Calcium Ions (Ca2+)

Trigger muscle contraction by binding to troponin.

<p>Trigger muscle contraction by binding to troponin.</p>
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creatine phosphate

An energy storage molecule used by muscle tissue. The phosphate from creatine phosphate can be removed and attached to an ADP to generate ATP quickly.

<p>An energy storage molecule used by muscle tissue. The phosphate from creatine phosphate can be removed and attached to an ADP to generate ATP quickly.</p>
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aerobic respiration

Respiration that requires oxygen

<p>Respiration that requires oxygen</p>
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lactic acid fermentation

the chemical breakdown of carbohydrates that produces lactic acid as the main end product

<p>the chemical breakdown of carbohydrates that produces lactic acid as the main end product</p>