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102 - Theme 1 > L6 Principles of the Muscular System > Flashcards

L6 Principles of the Muscular System Flashcards

1
Q

What is locomotion?

A 
requires contraction of muscle fibres (cells) 
Contractile proteins (myofilaments) arranged as myofibrils
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2
Q

What are the key features of skeletal muscle?

What are the different levels of CT?

A

Elongated and multinucleated
Peripheral nuclei
Bundles = fascicles

CT: Epimysium, Perimysium and endomysium

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3
Q

What causes movement of muscles, in terms of shortening?

A

Shortening between origin and insertion

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4
Q

What are the connective tissues of muscles?

A

Epimysium surrounds entire muscle, Perimysium surrounds fascicles
Regenerate - satellite cells

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5
Q

What is a sarcomere?

A

smallest functional unit of a skeletal muscle fibre

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6
Q

What are the myofilaments?

A

Actin (Thin)

Myosin (Thick)

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7
Q

Pectoralis Major origin/insertion

A

Origin: Clavicle, sternum and costal cartilages
Insertion: Humerus

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8
Q

Pectoralis Major action

A

Flexion, adduction and internal rotation of the shoulder joint

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9
Q

Pectoralis Major innervation

A

Lateral and Medial Pectoral nerve

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10
Q

Pectoralis Minor origion/inserion

A

Origin: Ribs 3, 4 and 5
Insertion: Corocoid process of the scapula

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11
Q

Pectoralis Minor action

A

Draws scapula anteriorly, inferiorly and medially

Elevates the ribs

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12
Q

Pectoralis Minor innervation

A

Medial Pectoral nerve

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13
Q

Biceps brachii origin/insertion

A

Origin:
Long head: Supraglenoid tubercle of the scapula
Short head: Corocoid process of the scapula

Insertion: Radius

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14
Q

Biceps brachii action

A

Flexion of the shoulder joint
Flexion of the elbow joint
Supination of the radio-ulnar joints

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15
Q

Biceps brachii innervation

A

Musculocutaneous nerve

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16
Q

Deltoid origin/insertion

A

Origin: Clavicle, acromion and Spine of the scapula

Insertion: Deltoid tuberosity of the humerus

17
Q

Deltoid action

A

Abduction of the shoulder joint

18
Q

Deltoid innervation

A

Axillary nerve

19
Q

Serratus Anterior Origin/Insertion

A

Origin: Upper 8 Ribs

Insertion: Scapula

20
Q

Serratus Anterior action

A

Protraction of the scapula

Holds scapula flat against the thoracic cage

21
Q

Serratus Anterior innervation

A

Long Thoracic nerve

22
Q

Muscle types [6]

A 
Flat 
Pennate
Fusiform
Quadrate
Circular
Multi-headed/bellied

102 - Theme 1 (8 decks)

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