TCA - AM 2 Upper Extremity muscles Payday

Last updated about 5 years ago

9 questions

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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?

Biceps femoris

Biceps brachii

Flexor pollicus longus

Pronator teres

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1

1

posterior, distal phalynx of digits 2-5

posterior, middle phalynx of digits 1-4

anterior, middle phalynx of digits 1-4

anterior, distal phalynx of digits 2-5

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2

Flexes elbow

Extends arm at shoulder

Supinates forearm

Pronates forearm

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1

acetylcholine receptors in the motor end plate

the Na+/K+ pump

elastic (titin) filaments

actin of thin filaments

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Biceps femoris

Biceps brachii

Flexor pollicus longus

Pronator teres

posterior, distal phalynx of digits 2-5

posterior, middle phalynx of digits 1-4

anterior, middle phalynx of digits 1-4

anterior, distal phalynx of digits 2-5

Flexes elbow

Extends arm at shoulder

Supinates forearm

Pronates forearm

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

acetylcholine receptors in the motor end plate

the Na+/K+ pump

elastic (titin) filaments

actin of thin filaments

Calcium binds to troponin, shifting tropomyosin to unblock actin-binding sites
With ATP present, ATPase splits ATP to ADP + P + Energy
Impulse stops, calcium or ATP depleted, calcium ions return to SR
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)
Calcium is actively pumped back to SR
Myosin heads combine with actin-binding sites
Sodium ions enter the muscle fiber, initiating an action potential that travels down the T-tubules to the Terminal Cisternae
Calcium ions released from SR and binds with troponin
Motor nerve impulses (AP) to the neuromuscular junction

pronation 

adducts wrist

abducts wrist

Match the muscles of the lower extremity to the appropriate description

Levator scapulae

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

Triceps brachii

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

Deltoids

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

Latissimus dorsi

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

Pectoralis minor

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

Biceps brachii

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

Pronator Teres

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

Rhomboid major

A:  extends forearm, I: olecranon process

Teres major

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

Rhomboid minor

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

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

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)

Calcium is actively pumped back to SR

Myosin heads combine with actin-binding sites    

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

Calcium ions released from SR and binds with troponin

Motor nerve impulses (AP)  to the neuromuscular junction