Question 1

Which are adductors of the arm at the glenohumeral joint?
A)anterior deltoid,biceps brachii long head,coracobrachialis
B)subscapularis,pectoralis minor,serratus anterior
C)coracobrachialis,pectoralis major,teres major
D)teres major,teres minor,supraspinatus

Accepted Answer

The adductors of the arm at the glenohumeral joint are the coracobrachialis, pectoralis major, and teres major. Option A includes the anterior deltoid and biceps brachii long head, which are abductors and flexors of the arm, respectively. Option B includes the subscapularis, pectoralis minor, and serratus anterior, which are mainly responsible for stabilizing the scapula and rotating the humerus. Option D includes the teres minor and supraspinatus, which are both rotator cuff muscles and involved in the external rotation of the arm.

Question 2

Which are extensors of the arm at the glenohumeral joint?
A)teres major,teres minor,infraspinatus
B)anterior deltoid,biceps brachii,coracobrachialis
C)triceps brachii long head,biceps brachii long head
D)posterior deltoid,latissimus dorsi,teres major

Accepted Answer

The posterior deltoid, latissimus dorsi, and teres major are all extensors of the arm at the glenohumeral joint.

Question 3

Which are elbow joint extensors?
A)triceps brachii,anconeus
B)pronator teres,pronator quadratus,supinator
C)brachioradialis,extensor digitorum
D)brachialis,pronator teres,brachioradialis

Accepted Answer

Triceps brachii and anconeus are the elbow joint extensors. Pronator teres, pronator quadratus, supinator, brachioradialis, extensor digitorum, and brachialis are not elbow joint extensors.

Question 4

Which are radioulnar joint pronators?
A)pronator teres,biceps brachii,triceps brachii
B)pronator teres,brachioradialis,pronator quadratus
C)supinator,brachioradialis,biceps brachii
D)flexor carpi radialis,extensor carpi radialis longus,abductor pollicis longus

Accepted Answer

Pronator teres and pronator quadratus are the primary pronators of the radioulnar joint, while brachioradialis is a weak pronator that assists with elbow flexion but also helps with pronation. Biceps brachii and triceps brachii are not directly involved in pronation. The options C and D include muscles that are not involved in pronation at all.

Question 5

Which are depressors of the scapula at the scapulocostal joint?
A)upper trapezius,lower trapezius,rhomboids
B)rhomboids,serratus anterior,pectoralis minor
C)levator scapulae,upper trapezius,serratus anterior
D)pectoralis major,pectoralis minor,lower trapezius

Accepted Answer

The pectoralis minor and lower trapezius are muscles that depress the scapula. The pectoralis major can also assist in this action when the arm is fixed.

Question 6

Which are abductors of the arm at the glenohumeral joint?
A)triceps brachii long head,biceps brachii long head
B)latissimus dorsi,teres major,pectoralis major
C)deltoid,supraspinatus,biceps brachii long head
D)anterior deltoid,biceps brachii,coracobrachialis

Accepted Answer

The deltoid and supraspinatus muscles are primary abductors of the arm at the glenohumeral joint. The biceps brachii long head, while not a primary abductor, assists in stabilizing the shoulder during abduction.

Question 7

Which are retractors of the scapula at the scapulocostal joint?
A)serratus anterior,serratus posterior superior
B)levator scapulae,upper trapezius,serratus anterior
C)pectoralis major,pectoralis minor,lower trapezius
D)trapezius,rhomboids

Accepted Answer

The trapezius and rhomboids are the primary retractors of the scapula at the scapulocostal joint. Serratus anterior and serratus posterior superior are involved in protraction of the scapula, while levator scapulae, upper trapezius, serratus anterior, pectoralis major, pectoralis minor, and lower trapezius are involved in other movements of the scapula.

Question 8

Which are elbow joint flexors?
A)triceps brachii,anconeus
B)pronator teres,pronator quadratus,supinator
C)brachioradialis,extensor digitorum
D)brachialis,pronator teres,brachioradialis

Accepted Answer

The elbow joint flexors include the brachialis, pronator teres, and brachioradialis. Therefore, choice D is the best answer as it includes all three of these muscles. Triceps brachii and anconeus are elbow joint extensors, while pronator teres, pronator quadratus, and supinator are muscles involved in forearm rotation. Brachioradialis and extensor digitorum are also involved in elbow joint motion, but are not specifically flexors.

Question 9

Which are downward rotators of the scapula at the scapulocostal joint?
A)rhomboids,pectoralis minor,deltoid
B)upper trapezius,lower trapezius,serratus anterior
C)serratus anterior,pectoralis minor,levator scapulae
D)upper trapezius,pectoralis minor,serratus posterior superior

Accepted Answer

The rhomboids and pectoralis minor are involved in downward rotation of the scapula.

Question 10

Which are wrist joint extensors?
A)flexor carpi radialis,palmaris longus,flexor carpi ulnaris
B)extensor carpi radialis longus,extensor carpi radialis brevis,extensor carpi ulnaris
C)flexor carpi radialis,flexor digitorum superficialis,extensor digitorum
D)brachioradialis,extensor carpi radialis longus,extensor carpi radialis brevis

Accepted Answer

Extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris are the wrist joint extensors.

Question 11

Which are radioulnar joint supinators?
A)pronator teres,biceps brachii,triceps brachii
B)pronator teres,brachioradialis,pronator quadratus
C)supinator,brachioradialis,biceps brachii
D)flexor carpi radialis,extensor carpi radialis longus,abductor pollicis longus

Accepted Answer

The supinators of the radioulnar joint are the supinator muscle, brachioradialis, and biceps brachii. These muscles are responsible for rotating the forearm into a palm-up position.

Question 12

Which are medial rotators of the arm at the glenohumeral joint?
A)subscapularis,teres major,pectoralis major
B)serratus anterior,serratus posterior superior,brachialis
C)teres minor,anterior deltoid,teres major
D)teres minor,infraspinatus,posterior deltoid

Accepted Answer

The subscapularis, teres major, and pectoralis major are all muscles that medially rotate the arm at the glenohumeral joint.

Question 13

Which are elevators of the scapula at the scapulocostal joint?
A)upper trapezius,lower trapezius,rhomboids
B)rhomboids,serratus anterior,pectoralis minor
C)levator scapulae,upper trapezius,serratus anterior
D)pectoralis major,pectoralis minor,serratus anterior

Accepted Answer

The elevators of the scapula at the scapulocostal joint include the levator scapulae and the upper trapezius. The serratus anterior primarily protracts the scapula but can assist in elevation.

Question 14

Which are lateral rotators of the arm at the glenohumeral joint?
A)latissimus dorsi,teres major,pectoralis major
B)teres minor,infraspinatus,posterior deltoid
C)teres minor,anterior deltoid,teres major
D)biceps brachii,coracobrachialis,pectoralis minor

Accepted Answer

The teres minor and infraspinatus are the primary lateral rotators of the arm at the glenohumeral joint. The posterior deltoid also contributes to this movement, but to a lesser extent. The other options listed do not include any of the primary lateral rotators.

Question 15

Which are wrist joint flexors?
A)flexor carpi radialis,palmaris longus,flexor carpi ulnaris
B)extensor carpi radialis longus,extensor carpi radialis brevis,extensor carpi ulnaris
C)brachialis,brachioradialis,pronator teres
D)flexor carpi radialis,flexor digitorum superficialis,extensor digitorum

Accepted Answer

Flexor carpi radialis, palmaris longus, and flexor carpi ulnaris are all muscles that produce flexion at the wrist joint. The other options listed produce either extension or movement at the elbow joint.

Question 16

Which are protractors of the scapula at the scapulocostal joint?
A)pectoralis minor,pectoralis major,serratus anterior
B)trapezius,rhomboids
C)serratus anterior,serratus posterior superior
D)middle trapezius,levator scapulae

Accepted Answer

The serratus anterior is the primary muscle responsible for protraction of the scapula at the scapulocostal joint. Pectoralis minor also assists in this movement, while pectoralis major can contribute indirectly through its actions on the shoulder.

Question 17

Which are flexors of the arm at the glenohumeral joint?
A)posterior deltoid,latissimus dorsi,teres major
B)biceps brachii,coracobrachialis,teres minor
C)anterior deltoid,biceps brachii,coracobrachialis
D)subscapularis,teres major,clavicular head of pectoralis major

Accepted Answer

The anterior deltoid, biceps brachii, and coracobrachialis all contribute to flexion of the arm at the glenohumeral joint. The other options listed do not involve all three of these muscles in flexion.

Question 18

Which are wrist joint ulnar deviators (adductors)?
A)extensor carpi radialis brevis,brachioradialis
B)flexor carpi ulnaris,extensor carpi ulnaris
C)extensor carpi radialis longus,flexor carpi radialis
D)abductor pollicis longus,extensor digiti minimi

Accepted Answer

The wrist joint ulnar deviators (adductors) are the flexor carpi ulnaris and the extensor carpi ulnaris. These muscles work together to allow for sideways movement of the wrist towards the ulnar side of the forearm. The other muscles listed primarily contribute to other movements of the wrist and hand, but not ulnar deviation.

Question 19

Which are upward rotators of the scapula at the scapulocostal joint?
A)rhomboids,pectoralis minor,deltoid
B)upper trapezius,lower trapezius,serratus anterior
C)serratus anterior,pectoralis minor,levator scapulae
D)upper trapezius,pectoralis minor,serratus posterior superior

Accepted Answer

The upward rotators of the scapula at the scapulocostal joint are the upper trapezius, lower trapezius, and serratus anterior. The rhomboids and pectoralis minor are not primarily responsible for upward rotation, and the deltoid is a shoulder abductor. The levator scapulae and serratus posterior superior are not upward rotators.

Question 20

Which are wrist joint radial deviators (abductors)?
A)extensor carpi radialis brevis,brachioradialis
B)flexor carpi ulnaris,extensor carpi ulnaris
C)extensor carpi radialis longus,flexor carpi radialis
D)abductor pollicis longus,extensor digiti minimi

Accepted Answer

The two wrist joint radial deviators (abductors) are the extensor carpi radialis longus and flexor carpi radialis. The other muscles listed do not abduct the wrist joint radially.

Quiz 19: Functional Groups of Muscles

Which are adductors of the arm at the glenohumeral joint?

Which are extensors of the arm at the glenohumeral joint?

Which are elbow joint extensors?

Which are radioulnar joint pronators?

Which are depressors of the scapula at the scapulocostal joint?

Which are abductors of the arm at the glenohumeral joint?

Which are retractors of the scapula at the scapulocostal joint?

Which are elbow joint flexors?

Which are downward rotators of the scapula at the scapulocostal joint?

Which are wrist joint extensors?

Which are radioulnar joint supinators?

Which are medial rotators of the arm at the glenohumeral joint?

Which are elevators of the scapula at the scapulocostal joint?

Which are lateral rotators of the arm at the glenohumeral joint?

Which are wrist joint flexors?

Which are protractors of the scapula at the scapulocostal joint?

Which are flexors of the arm at the glenohumeral joint?

Which are wrist joint ulnar deviators (adductors) ?

Which are upward rotators of the scapula at the scapulocostal joint?

Which are wrist joint radial deviators (abductors) ?