Question 1

The forearm muscles that provide strength and gross control of the hand and fingers are (the)

Accepted Answer

The extrinsic muscles of the hand are those that originate from the forearm and provide gross control and strength to the hand and fingers. These muscles include the flexors and extensors of the hand, as well as the pronator and supinator muscles. The intrinsic muscles of the hand are those that originate and insert within the hand itself, providing fine motor control and precision movements of the fingers. The carpal tunnel muscles of the hand are not a recognized group of muscles, but rather refer to the group of structures that pass through the carpal tunnel in the wrist.

Question 2

The subclavius muscle

Accepted Answer

The subclavius muscle originates from the first rib and inserts on the undersurface of the clavicle, helping to stabilize it.

Question 3

The origin of the deltoid is (the)

Accepted Answer

The deltoid originates from the acromion and spine of the scapula, as well as the lateral third of the clavicle. Therefore, the correct answer is E, both scapula and clavicle.

Question 4

The origins of the extrinsic muscles of the hand are the

Accepted Answer

The extrinsic muscles of the hand originate from the humerus, radius, and ulna, allowing them to control hand movements by acting on the wrist and fingers.

Question 5

Which muscle inserts on the vertebral border of the scapula near the angle of the scapula and the medial end of the scapular spine

Accepted Answer

The answer of Which muscle inserts on the vertebral border...

Question 6

The muscle just superior to the spine of the scapula that is part of the rotator cuff is the

Accepted Answer

The muscle just superior to the spine of the scapula that is part of the rotator cuff is the supraspinatus. The coracobrachialis muscle is located in the upper arm, while the infraspinatus, subscapularis, and teres minor muscles are also part of the rotator cuff but located in different areas.

Question 7

Triceps brachii is assisted in extension of the elbow by the synergistic muscle

Accepted Answer

The synergistic muscle that assists triceps brachii in extension of the elbow is the anconeus muscle. It is a small triangular muscle located at the posterior aspect of the elbow joint and acts as a synergist to triceps brachii during extension of the elbow joint. The other options listed are not involved in the extension of the elbow joint.

Question 8

Which of the following applies to the appendicular musculature It

Accepted Answer

The appendicular musculature comprises approximately 40 percent of the body's skeletal muscles.

(Note: None of the other options listed pertain to the appendicular musculature. Option A refers to the axial musculature, option B is controlled by the cervical musculature, option C is controlled by the smooth muscle of the digestive system, and option E is incorrect as skeletal muscle is voluntary.)

Question 9

The ________ muscle covers most of the surface area of the upper back.

Accepted Answer

The trapezius muscle is a large, triangular muscle that covers most of the upper back. It starts at the base of the skull and extends down to the middle of the back, and it is responsible for movements such as shoulder elevation, retraction, and depression. The rhomboid and infraspinatus muscles are located in the upper back as well, but they do not cover as much surface area as the trapezius muscle. The teres major muscle is located in the armpit area and is not part of the upper back musculature.

Question 10

All extensor muscles of the upper limb are innervated by the ________ nerve or a branch of that nerve.

Accepted Answer

The extensor muscles of the upper limb are innervated by the radial nerve or a branch of that nerve.

Question 11

An injury called tendinitis

Accepted Answer

Tendinitis is the result of inflammation of the connective tissue surrounding a tendon, which can be caused by repetitive motion, overuse, or injury.

Question 12

Muscles associated with the upper limb and pectoral girdle belong to which of the following groups

Accepted Answer

All the listed muscle groups are associated with the upper limb and pectoral girdle, as they include muscles that position the pectoral girdle, move the arm, forearm, wrist, hand, and fingers.

Question 13

The major groups of appendicular muscles include those of (the)

Accepted Answer

The appendicular muscles are those that are attached to the limbs and girdles. The major groups of appendicular muscles include those of the shoulder and upper limb region, the pelvic girdle and lower limbs, and the shoulder, pelvis, and upper and lower limbs.

Question 14

The forearm muscles that provide strength and gross control of the hand and fingers are innervated by the

Accepted Answer

The forearm muscles that provide strength and gross control of the hand and fingers are innervated by all three nerves: radial nerve, median nerve, and ulnar nerve.

Question 15

The muscles that form the rotator cuff include the

Accepted Answer

The muscles that form the rotator cuff are the teres minor, infraspinatus, supraspinatus, and subscapularis. Option A includes the correct muscles but also adds the deltoid muscle, which is not part of the rotator cuff. Option B includes the deltoid muscle but does not include any of the rotator cuff muscles. Option D includes the subscapularis muscle but also includes muscles that are not part of the rotator cuff. Option E includes the deltoid and pectoralis minor muscles, but does not include any of the rotator cuff muscles.

Question 16

Triceps brachii is opposed in extension of the elbow by the antagonistic muscle

Accepted Answer

The brachialis muscle is the primary antagonist to the triceps brachii during elbow extension, as it is a major flexor of the elbow.

Question 17

While driving to school to take an anatomy test, a college student gets in a car accident and breaks her collar bone on the steering wheel. Which of the following muscles is the most likely damaged in this injury

Accepted Answer

The subclavius muscle runs underneath the collar bone and helps to stabilize it. An injury to the collar bone, such as a fracture from a car accident, would likely damage this muscle since it is in close proximity. The other muscles listed are all located in the shoulder and upper back and would not be directly affected by a collar bone injury.

Question 18

A mixed martial artist has is put in a submission hold called a "kimora." While in the hold the elbow is moved behind the back so that the elbow approaches the thoracic vertebrae. What muscle of the shoulder region is the most likely also to be injured

Accepted Answer

The supraspinatus muscle is located in the supraspinous fossa of the scapula and is responsible for initiating shoulder abduction. When the elbow is moved behind the back in a kimora hold, it puts excessive strain on the supraspinatus muscle, potentially leading to injury or tear.

Question 19

The ________ muscle attaches to the radial tuberosity.

Accepted Answer

The biceps brachii muscle attaches to the radial tuberosity, which is a key feature distinguishing it from other muscles listed.

Question 20

Muscles that originate on the hamate bone include (the)

Accepted Answer

The flexor digiti minimi brevis and opponens digiti minimi muscles both originate on the hamate bone.

Quiz 11: The Muscular System: Appendicular Musculature