TCA - AM 2 Upper Extremity muscles Payday

Last updated about 5 years ago

9 questions

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1

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10

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Last updated about 5 years ago

9 questions

2

Which muscle(s) contributes to forearm flexion?

2

1

1

1

2

10

1

3

Ach released by the synaptic vesicles crosses synaptic cleft; then acetylcholinesterase breaks down Ach
Tropomyosin covers binding sites, myosin no longer bound

Draggable item		Corresponding Item
Teres major		O: anterior surface of ribs 3-5; I: coracoid process
Deltoids		I: upper medial border of scapula; A: elevates and adducts scapula
Rhomboid major		O: T2-T5, I: medial border of scapula
Levator scapulae		O: C7-T1, A: retracts and rotates scapula to rest position
Rhomboid minor		A: extends and adducts arm: I: intertubercle groove of humerus
Pectoralis minor		O: acromion, spine of scapula and lateral 1/3 of clavicle, A: abducts, extends and medially & laterally rotates the arm
Latissimus dorsi		O: inferior border of scapula, A: medially rotates and adducts arm
Biceps brachii		A: extends forearm, I: olecranon process
Triceps brachii		O: supraglenoid tubercle of scapula & coracoid process of the scapula, I: posterior border of bicipital/radial tuberosity of radius
Pronator Teres		I: lateral shaft/convexity of radius, A: pronates and flexes forearm

Ach released by the synaptic vesicles crosses synaptic cleft; then acetylcholinesterase breaks down Ach
Tropomyosin covers binding sites, myosin no longer bound
Sliding action of actin over myosin (Sliding Filament Theory)
Myosin heads combine with actin-binding sites
Calcium binds to troponin, shifting tropomyosin to unblock actin-binding sites
Calcium is actively pumped back to SR
With ATP present, ATPase splits ATP to ADP + P + Energy
Motor nerve impulses (AP) to the neuromuscular junction
Calcium ions released from SR and binds with troponin
Impulse stops, calcium or ATP depleted, calcium ions return to SR
Sodium ions enter the muscle fiber, initiating an action potential that travels down the T-tubules to the Terminal Cisternae

pronation 

adducts wrist

abducts wrist

anterior, distal phalynx of digits 2-5

Pronates forearm

Match the muscles of the lower extremity to the appropriate description

Teres major

O: anterior surface of ribs 3-5; I: coracoid process

Deltoids

I:  upper medial border of scapula; A: elevates and adducts scapula

Rhomboid major

O: T2-T5, I: medial border of scapula

Levator scapulae

O: C7-T1, A: retracts and rotates scapula to rest position

Rhomboid minor

A: extends and adducts arm: I: intertubercle groove of humerus

Pectoralis minor

O: acromion, spine of scapula and lateral 1/3 of clavicle, A: abducts, extends and medially & laterally rotates the arm

Latissimus dorsi

O: inferior border of scapula, A: medially rotates and adducts arm

Biceps brachii

A:  extends forearm, I: olecranon process

Triceps brachii

O: supraglenoid tubercle of scapula & coracoid process of the scapula, I:  posterior border of bicipital/radial tuberosity of radius 

Pronator Teres

I: lateral shaft/convexity of radius, A: pronates and flexes forearm

Sliding action of actin over myosin (Sliding Filament Theory)

Myosin heads combine with actin-binding sites    

Calcium binds to troponin, shifting tropomyosin to unblock actin-binding sites    

Calcium is actively pumped back to SR

With ATP present, ATPase splits ATP to ADP + P + Energy    

Motor nerve impulses (AP)  to the neuromuscular junction

Calcium ions released from SR and binds with troponin

Impulse stops, calcium or ATP depleted, calcium ions return to SR

Sodium ions enter the muscle fiber, initiating an action potential that travels down the T-tubules to the Terminal Cisternae     