Question 1

Which of the following best describes the function of the pectoral girdle?

Accepted Answer

It joins the arms to the trunk and provides attachment for muscles that move the upper limb.

Question 2

The only direct articulation between the pectoral girdle and the axial skeleton occurs at which joint?

Accepted Answer

Sternoclavicular joint

Question 3

Which bone is described as S-shaped and connects the upper limb to the trunk?

Accepted Answer

Clavicle

Question 4

The acromial end of the clavicle is characterized by which of the following features?

Accepted Answer

It is flatter, broader, and articulates with the acromion of the scapula.

Question 5

Which joint is formed by the articulation of the acromion of the scapula and the clavicle?

Accepted Answer

Acromioclavicular joint

Question 6

A patient presents with a shoulder injury. Imaging reveals damage to the joint that stabilizes the connection between the clavicle and the scapula. Which ligaments are most likely affected?

Accepted Answer

Ligaments attaching to the conoid tubercle and costal tuberosity

Question 7

Which of the following statements about the scapula is correct?

Accepted Answer

Its posterior surface is convex and contains the scapular spine.

Question 8

If the acromioclavicular joint is dislocated, which movement would be most affected?

Accepted Answer

Elevation of the shoulder

Question 9

Which anatomical feature of the clavicle is most likely to be palpated at the lateral end near the shoulder?

Accepted Answer

Acromial end

Question 10

A fracture at the sternal end of the clavicle would most likely disrupt which joint?

Accepted Answer

Sternoclavicular joint

Question 11

Which of the following best explains why the clavicle is more prone to fractures than the scapula?

Accepted Answer

It is an S-shaped bone that acts as a strut and transmits forces from the upper limb to the axial skeleton.

Question 12

Which structure is NOT part of the pectoral girdle?

Accepted Answer

Humerus

Question 13

During a physical exam, a physician palpates a rough surface on the inferior side of the clavicle. This area is most likely the:

Accepted Answer

Conoid tubercle

Question 14

Which of the following is the correct sequence of bones from medial to lateral in the pectoral girdle?

Accepted Answer

Clavicle, scapula, humerus

Question 15

If a patient has a congenital defect resulting in the absence of the acromion, which joint would be missing?

Accepted Answer

Acromioclavicular joint

The Appendicular Skeleton: Structure and Function

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