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Anatomy > Muscular System > Flashcards

Muscular System Flashcards

1
Q

Types of muscles

A

Visceral (smooth) muscles
Cardiac Muscles
Skeletal muscles

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2
Q

Shape and Sites of smooth muscles

A

Short, tappered nucleus

in the walls of visceral organs and blood vessels to provide peristalsis and modify the caliber of the lumen

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3
Q

Nerve supply of smooth muscles

A

Autonomic nervous system

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4
Q

Mode of action of visceral muscles

A

INVOLUNTARY

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5
Q

Shape and sites of cardiac muscles

A

Striated, branched, interciliated cells with central nuclei

In the wall of the heart (MYOCARDIUM)

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6
Q

Nerve supply of cardiac muscles

A

Autonomic nervous system

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7
Q

Mode of action of cardiac muscles

A

INVOLUNTARY

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8
Q

Shape and sites of skeletal muscles

A

Striated cells with multiple peripheral nuclei

Attatched to the skeleton

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9
Q

Nerve supply of skeletal muscles

A

Somatic nervous system

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10
Q

Mode of action of skeletal muscles

A

Voluntary

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11
Q

Raphe

A

Interdigitaions of tendinous ends of fibres of flat muscles

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12
Q

Parts of skeletal muscles

A

Origin
Insertion
Belly (fleshy part)

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13
Q

Parallel skeletal muscles examples

A

Sartorius muscles in thigh
Extrinsic muscles of the eye
Rectus abdominus

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14
Q

Tiangular skeletal muscles examples

A

Temporalis

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15
Q

Unipenate skeletal muscles examples

A

Flexor pollicis longus

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16
Q

Bipennate skeletal muscles examples

A

Rectus femoris in the thigh

17
Q

Multipennate flat skeletal muscles examples

A

Middle fibres of the deltoid

18
Q

Circumpennate skeletal muscles examples

A

Tibialis anterior

19
Q

Spiral skeletal muscles examples

A

Trapezius

Pectoralis major

20
Q

Prime mover

A

Starts a movement and maintains it

Quadriceps femoris is a prime mover in movement of extending the knee joint

21
Q

Antagonist

A

The muscle that opposes the action of the prime mover

Biceps femoris opposes the action of the quadriceps femoris when the knee joint is extended

22
Q

Fixator

A

Contraction is isometric to stabilise the origin of the prime mover

23
Q

Synergic

A

When a prime mover muscle crosses over several joints before reaching the joint where its main action takes place, a group of muscles called the synergic muscles prevent unwanted movements iin intermediate joints

24
Q

Action of paradox

A

Antigravity muscles needed to maintain posture

25
Q

Hilton’s law

A

The motor nerve to a muscle tends to give a branch of suppy to the to the joint which the muscle moves and another branch to the skin over the joint

Anatomy (8 decks)

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