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Anatomy and physiology > Muscular System > Flashcards

Muscular System Flashcards

1
Q

Origin

A

The attachment to the immovable bone

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2
Q

Insertion

A

The attachment to the movable bone

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3
Q

Fixator

A

Muscles stabilize the origin of a prime mover

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4
Q

Synergist

A

Either produce the same movement or reduce undesirable movements

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5
Q

Agonist

A

Prime mover, the muscle that produces a particular movement

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6
Q

Antagonist

A

Produces the opposite effect on the same bones

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7
Q

Muscle fiber

A

Muscle cell

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8
Q

Myofybril

A

Long ribbonlike fibers of a muscle cell, contain sarcomeres

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9
Q

Myofilament

A

Threadlike proteins in the myofibril, two types: actin, myosin

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10
Q

Actin

A

Thin myofilament

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11
Q

Myosin

A

Thick myosin

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12
Q

Sarcomere

A

Functional unit of the muscle fibers, made of actin and myosin

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13
Q

Sarcolemma

A

Muscle cell membrane

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14
Q

Sarcoplasmic reticulum

A

Stores calcium ions needed for contraction

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15
Q

A band

A

Runs the entire length of a single thick filament, darker

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16
Q

I band

A

Where thin filaments are not overlapped by thick filaments, lighter

17
Q

H zone

A

Lighter region with the A band where there are no thin filaments

18
Q

M line

A

Middle of the sarcomere, contains tiny proteins rods that hold adjacent thick filaments together

19
Q

Z disc

A

End if the sarcomere where actin filaments meet, middle of the I band

20
Q

Neuromuscular junction

A

Axon terminal forms a junction with the sarcolemma

21
Q

ACh

A

Neurotransmitter responsible for muscle contraction

22
Q

Endomysium

A

Connective tissue wrapping around a muscle fiber

23
Q

Perimysium

A

Connective tissue wrapping around a fascicle

24
Q

Epimysium

A

Connective tissue wrapping around a muscle

25
Q

Fascicle

A

Group of muscle fibers bundled together

26
Q

Muscle (organ)

A

Group of fascicles bundled together

27
Q

Synapse

A

Space where the neuron and muscle cell meet

Anatomy and physiology (4 decks)

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