Mastering A&P Chapter 10

The action that moves the scapula towards the head is called __________. protraction medial rotation elevation retraction

Which movement results after the contraction of the serratus anterior muscle? scapular protraction and rotation scapular elevation abduction of the humerus scapular retraction

Which movement is not associated with the scapula? protraction depression elevation opposition

The two heads of the biceps brachii muscle converge distally to insert on the __________. scapula ulnar notch radial tuberosity ulna

The coracobrachialis muscle originates on the __________. medial surface of the humeral shaft greater tuberosity of the humerus coracoid process of the scapula radial tuberosity

The posterior scapular muscle that crosses the glenohumeral joint is the __________. teres major teres minor latissimus dorsi pectoralis major

The __________ is a prime mover of the glenohumeral joint during flexion. teres major coracobrachialis deltoid biceps brachii

Which of the following muscles assists during extension of the glenohumeral joint, but is not as a prime mover? deltoid teres major latissimus dorsi biceps brachii

Without lateral rotation of the humerus by the teres minor and infraspinatus muscles, the maximum angle of abduction by the deltoid would be __________. 75 degrees 90 degrees 180 degrees 30 degrees

Abduction requires the action of two muscles, and adduction requires the action of __________. two muscles three muscles one muscle four muscles

Which muscle is not part of the rotator cuff? teres minor muscle infraspinatus muscle supraspinatus muscle teres major muscle

Downward dislocation of the humerus from the glenohumeral joint when carrying weight is prevented by the __________. supraspinatus muscle teres minor muscle infraspinatus muscle subscapularis muscle

The angle of which muscle prevents the humeral head from sliding upward out of the joint as the arm is raised? infraspinatus subscapularis teres minor supraspinatus

The rotator cuff is a term used to describe the group of muscles and tendons that stabilize and reinforce the __________. pectoral girdle scapula elbow joint glenohumeral joint

All the tendons of the rotator cuff muscles combine at which location? radial tuberosity scapula coranoid process humeral head

To keep the humeral head centered within the glenoidal cavity the rotator cuff muscles must be __________. located in the same plane located anteriorly located distally located posteriorly

The location of the rotator cuff muscles in relation to the glenohumoral joint minimizes the upward pressure against the __________. humerus clavicle acromion of the scapula coracoid process of the scapula

The muscles that extend the forearm are located __________. medially laterally anteriorly posteriorly

Which of the following statements about muscles of the elbow joint is true? The biceps brachii is a posterior extensor. The brachioradialis originates and inserts on the ulna. The biceps brachii has two heads that share the same origin site. None of these statements is correct.

The two heads of the biceps brachii muscle come together distally to insert on the __________. deltoid tuberosity radial tuberosity styloid process of the radius ulnar tuberosity

The smallest of the posterior extensors of the elbow joint is the __________. The smallest of the posterior extensors of the elbow joint is the __________. triceps brachii brachioradialis biceps brachii anconeus

The origin of the long head of the triceps brachii is on the __________. olecranon process of the ulna infraglenoid tubercle of the scapula posterior shaft of the humerus anterior shaft of the humerus

The muscle that generates the most power during elbow flexion is the __________. triceps brachii biceps brachii brachioradialis brachialis

The prime mover of elbow extension is the __________. triceps brachii biceps brachii brachialis anconeus

Which of the following statements about muscles of the forearm is true? The pronator quadratus originates on the radius and inserts on the ulna. The pronator quadratus is a two-headed muscle. Contraction of the pronator quadratus and the supinator results in forearm pronation. The pronator teres originates on the medial epicondyle and inserts on the radius.

Contraction of the pronator quadratus and the pronator teres muscle results in pronation.

Forearm supination is assisted by the __________. biceps brachii brachioradialis supinator triceps brachii

An origin of the supinator is the __________. lateral epicondyl of the humerus supinator crest of the humerus radius ulna

The interosseous membrane is located between the __________. humerus and radius ulna and the carpal bones of the wrist radius and ulna humerus and ulna

Which muscle of the wrist and fingers is a deep anterior flexor? flexor digitorum superficialis flexor carpi ulnaris flexor pollicis longus palmaris longus

Which superficial flexor muscle of the forearm is the most lateral? palmaris longus flexor carpi ulnaris flexor digitorum superficialis flexor carpi radialis

The palmaris longus inserts on the __________. palmar aponeurosis medial epicondyle of the humerus bodies of phalanges 2-5 bases of the second and third metacarpals

Which muscle is a superficial anterior flexor muscle? flexor digitorum profundus flexor pollicis longus flexor digitorum superficialis flexor digiti minimi brevis

The extensor muscle that branches to form four tendons on the back of the hand is the __________. extensor carpi radialis brevis extensor carpi radialis longus extensor ulnaris extensor digitorum

The deep posterior extensor of the wrist and fingers __________. controls the thumb and index finger controls the thumb and wrist controls all four digits controls the index finger and wrist

Which deep posterior extensor of the wrist originates on the radius and ulna and interosseous membrane? the extensor indicis the abductor pollicis longus the extensor pollicis brevis the extensor pollicis longus

The prime mover of wrist extension is the __________. extensor carpi radialis longus extensor carpi ulnaris extensor carpi radialis brevis extensor digitorum

Wrist abduction occurs through the actions of __________ muscles. two five four three

The iliacus and the psoas major muscles are collectively known as the ____________ muscle because they share a common insertion on the __________ of the femur. iliopsoas; greater trochanter psoasiliacus; greater trochanter psoasiliacus; lesser trochanter iliopsoas; lesser trochanter

The lateral rotators act on the __________. femur sacrum lumbar vertebrae os coxae

The piriformis originates on the __________ and inserts on the __________. ischium; greater trochanter of the femur ischium; lesser trochanter of the femur sacrum; greater trochanter of the femur sacrum; lesser trochanter of the femur

The medial muscles of the hip joint that insert on the linea aspera are the __________. adductor magnus, adductor brevis, and adductor longus adductor magnus, adductor brevis, and pectineus gracilis, adductor magnus, pectineus, and adductor longus pectineus, adductor magnus, and adductor longus

The prime mover of hip extension is the __________. gracilis gluteus maximus pectineus adductor magnus

The tensor fascia latae is involved in hip __________. abduction adduction lateral rotation extension

The anterior muscles of the thigh that originate on the os coxae are __________. sartorius; rectus femoris rectus femoris; vastus medialis vastus lateralis; vastus medialis sartorius; vastus medialis

The hamstring muscles originate on the __________. medial surface of the tibia ischial tuberosity medial surface of the fibula lesser trochanter of the femur

To allow for flexion, the __________ unlocks the knee joint. . popliteus semimembranosus biceps femoris sartorius

The two muscles that insert on the fifth phalanx or on the fifth metatarsal are the __________. extensor digitorum longus and fibularis longus extensor digitorum longus and fibularis tertius fibularis tertius and extensor hallucis longus fibularis longus and extensor hallucis longus

The flexor hallucis longus muscle originates on the __________. medial cuneiform femur distal phalanges of digits 2-5 interosseous membrane

The soleus and the gastrocnemius share an insertion on the __________. distal phalanx fibula calcaneus medial cuneiform

An insertion of the fibularis longus is the __________. medial cuneiform distal phalanx of digit one base of metatarsal five base of metatarsal two

The prime mover of dorsiflexion is the __________. extensor digitorum longus fibularis tertius tibialis anterior extensor hallucis longus

Eversion of the foot is a function of the __________. fibularis longus extensor hallucis extensor digitorum tibialis anterior

The most powerful movement at the ankle joint is __________, and the ________ is one of the prime movers of this movement. dorsiflexion; tibialis anterior plantar flexion; gastrocnemius dorsiflexion; gastrocnemius plantar flexion; tibialis anterior