Wk 3 LRA 217 & 218 Quizzes Questions and Complete
Solutions Graded A+
1–20: Shoulder Girdle (Scapula, Clavicle, AC/SC Joints)
1. Which of the following structures is not part of the proximal humerus?
A. Lesser tubercle
B. Glenoid process
C. Intertubercular groove
D. Anatomic neck
Answer: B. Glenoid process
Explanation: The glenoid process (correctly the glenoid cavity/fossa) is part of the scapula, not the
humerus. The proximal humerus includes the head, anatomic neck, surgical neck, greater/lesser
tubercles, and the intertubercular groove (bicipital groove).
2. Which term describes the medial (sternal) end of the clavicle?
A. Acromial extremity
B. Acromion
C. Sternal extremity
D. Acromial tuberosity
Answer: C. Sternal extremity
Explanation: The clavicle has a lateral (acromial) extremity that articulates with the acromion and a
medial (sternal) extremity that articulates with the manubrium of the sternum. The “sternal extremity”
is the correct term for the medial end.
3. T/F: The female clavicle is usually shorter and less curved than that of the male.
,A. True
B. False
Answer: A. True
Explanation: The female clavicle is typically shorter and exhibits less curvature compared to the male
clavicle, reflecting general skeletal dimorphism.
4. The anterior surface of the scapula is referred to as the:
A. Scapular surface
B. Dorsal surface
C. Supraspinous and infraspinous fossa
D. Costal surface
Answer: D. Costal surface
Explanation: The costal (anterior) surface of the scapula is concave and forms the subscapular fossa. It is
called “costal” because it faces the ribs.
5. What is the name of the large fossa found within the anterior surface of the scapula?
A. Supraspinous fossa
B. Infraspinous fossa
C. Subscapular fossa
D. Glenoid fossa
Answer: C. Subscapular fossa
Explanation: The subscapular fossa is the broad, slightly concave anterior surface of the scapula. It
provides attachment for the subscapularis muscle.
,6. What is the name of the insertion point for the deltoid muscle located on the anterolateral surface of
the humerus?
A. Surgical neck
B. Deltoid protuberance
C. Deltoid tuberosity
D. Intertubercular groove
Answer: C. Deltoid tuberosity
Explanation: The deltoid tuberosity is a roughened, V‑shaped area on the mid‑shaft of the humerus
where the deltoid muscle inserts.
7. T/F: All of the joints of the shoulder girdle are diarthrodial (freely movable).
A. True
B. False
Answer: A. True
Explanation: The shoulder girdle includes the glenohumeral, acromioclavicular, sternoclavicular, and the
scapulothoracic “joint.” All are synovial, diarthrodial joints, allowing a wide range of motion even though
the scapulothoracic connection is not a true anatomic joint.
8. Which of the following joints is considered to have a spheroidal (ball‑and‑socket) type of movement?
A. Acromioclavicular joints
B. Sternoclavicular joints
C. Bicipital joint
D. Scapulohumeral joint
Answer: D. Scapulohumeral joint
, Explanation: The glenohumeral (scapulohumeral) joint is a classic ball‑and‑socket (spheroidal) joint,
allowing flexion, extension, abduction, adduction, and rotation.
9. The acromioclavicular joint is classified as a:
A. Hinge joint
B. Pivot joint
C. Plane (gliding) joint
D. Condyloid joint
Answer: C. Plane (gliding) joint
Explanation: The AC joint is a planar synovial joint that permits limited gliding movements, which help to
maintain the position of the scapula relative to the clavicle.
10. The sternoclavicular joint is the only direct articulation between the upper limb and the:
A. Spine
B. Pelvis
C. Axial skeleton
D. Lower limb
Answer: C. Axial skeleton
Explanation: The sternoclavicular (SC) joint joins the clavicle to the manubrium of the sternum, making it
the only bony link between the upper extremity and the axial skeleton.
11. What radiographic projection is best for demonstrating the AC joints bilaterally for comparison?
A. PA chest
B. AP shoulder
C. Weight‑bearing AP AC joints (Pearson method)
D. Transthoracic lateral
Solutions Graded A+
1–20: Shoulder Girdle (Scapula, Clavicle, AC/SC Joints)
1. Which of the following structures is not part of the proximal humerus?
A. Lesser tubercle
B. Glenoid process
C. Intertubercular groove
D. Anatomic neck
Answer: B. Glenoid process
Explanation: The glenoid process (correctly the glenoid cavity/fossa) is part of the scapula, not the
humerus. The proximal humerus includes the head, anatomic neck, surgical neck, greater/lesser
tubercles, and the intertubercular groove (bicipital groove).
2. Which term describes the medial (sternal) end of the clavicle?
A. Acromial extremity
B. Acromion
C. Sternal extremity
D. Acromial tuberosity
Answer: C. Sternal extremity
Explanation: The clavicle has a lateral (acromial) extremity that articulates with the acromion and a
medial (sternal) extremity that articulates with the manubrium of the sternum. The “sternal extremity”
is the correct term for the medial end.
3. T/F: The female clavicle is usually shorter and less curved than that of the male.
,A. True
B. False
Answer: A. True
Explanation: The female clavicle is typically shorter and exhibits less curvature compared to the male
clavicle, reflecting general skeletal dimorphism.
4. The anterior surface of the scapula is referred to as the:
A. Scapular surface
B. Dorsal surface
C. Supraspinous and infraspinous fossa
D. Costal surface
Answer: D. Costal surface
Explanation: The costal (anterior) surface of the scapula is concave and forms the subscapular fossa. It is
called “costal” because it faces the ribs.
5. What is the name of the large fossa found within the anterior surface of the scapula?
A. Supraspinous fossa
B. Infraspinous fossa
C. Subscapular fossa
D. Glenoid fossa
Answer: C. Subscapular fossa
Explanation: The subscapular fossa is the broad, slightly concave anterior surface of the scapula. It
provides attachment for the subscapularis muscle.
,6. What is the name of the insertion point for the deltoid muscle located on the anterolateral surface of
the humerus?
A. Surgical neck
B. Deltoid protuberance
C. Deltoid tuberosity
D. Intertubercular groove
Answer: C. Deltoid tuberosity
Explanation: The deltoid tuberosity is a roughened, V‑shaped area on the mid‑shaft of the humerus
where the deltoid muscle inserts.
7. T/F: All of the joints of the shoulder girdle are diarthrodial (freely movable).
A. True
B. False
Answer: A. True
Explanation: The shoulder girdle includes the glenohumeral, acromioclavicular, sternoclavicular, and the
scapulothoracic “joint.” All are synovial, diarthrodial joints, allowing a wide range of motion even though
the scapulothoracic connection is not a true anatomic joint.
8. Which of the following joints is considered to have a spheroidal (ball‑and‑socket) type of movement?
A. Acromioclavicular joints
B. Sternoclavicular joints
C. Bicipital joint
D. Scapulohumeral joint
Answer: D. Scapulohumeral joint
, Explanation: The glenohumeral (scapulohumeral) joint is a classic ball‑and‑socket (spheroidal) joint,
allowing flexion, extension, abduction, adduction, and rotation.
9. The acromioclavicular joint is classified as a:
A. Hinge joint
B. Pivot joint
C. Plane (gliding) joint
D. Condyloid joint
Answer: C. Plane (gliding) joint
Explanation: The AC joint is a planar synovial joint that permits limited gliding movements, which help to
maintain the position of the scapula relative to the clavicle.
10. The sternoclavicular joint is the only direct articulation between the upper limb and the:
A. Spine
B. Pelvis
C. Axial skeleton
D. Lower limb
Answer: C. Axial skeleton
Explanation: The sternoclavicular (SC) joint joins the clavicle to the manubrium of the sternum, making it
the only bony link between the upper extremity and the axial skeleton.
11. What radiographic projection is best for demonstrating the AC joints bilaterally for comparison?
A. PA chest
B. AP shoulder
C. Weight‑bearing AP AC joints (Pearson method)
D. Transthoracic lateral
