Chapter 8 Flashcards by paige clune

Q

Same as muscle cell

A

Muscle fiber

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Q

Covers muscle

A

Epimysium

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Q

Covers cell

A

Endomysium

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Q

Covers fascicle

A

Perimysium

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Q

Connects skin to muscle or muscle to muscle

A

Fascia

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Q

Where a motor neuron stimulates a muscle cell

A

Neuromuscular junction

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Q

White connective tissue on ventral

A

Linea alba

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Q

Group of muscle cells

A

Fascicles

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Q

Needed to expose binding sites on actin

A

Troponin

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Q

Stores calcium ions

A

Terminal cisternae

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Q

Covers binding sites on actin

A

Tropomyosin

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Q

Fixed end

Moveable end

A

Origin

Insertion

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Q

When oxygen is lacking it causes

A

Lactic acid

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Q

Sheet that connects muscle to bone

A

Aponeurosis

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Q

Space between axon terminal and muscle cell

A

Synaptic cleft

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Q

Molecule of energy

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A

ATP

Q

Contains neurotransmitters

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A

Synaptic vesicles

Q

Cell membrane

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A

Sarcolemma

Q

Folded surface

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A

Motor end plate

Q

Pet of myosin that attaches to actin

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A

Cross bridge

Q

Increase in number of motor units being activated

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A

Recruitment

Q

Thin slides over thick

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A

Sliding filament theory

Q

Contracts or if doesn’t

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A

All or none

Q

Can lose a phosphate so energy creates ATP

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A

Creatine phosphate

Muscle can't contract due to overuse

Muscle fatigue

Binds to oxygen

Myoglobin

Sends message to the muscle

Axon

Aids agonist

Synergist

3 periods of a twitch

Latent Contraction Relaxation

Muscle enlarges Shrinks

Hyperatrophy Atrophy

Primarily causes movement

Agonist/prime mover

Opposite of agonist

Antagonist

1 motor neuron and all muscle fibers connected to it

Motor unit