Body anatomy and function Flashcards
What is the function of the humerus in the shoulder?
A) It provides attachment for ligaments.
B) It forms the ball of the ball-and-socket joint.
C) It forms the socket in the ball-and-socket joint.
D) It stabilizes the scapula.
Answer: B
What is the glenoid?
A) A bony projection at the top of the scapula.
B) The shallow socket in the scapula where the humeral head fits.
C) The collarbone, connecting the shoulder to the rib cage.
D) A ligament that reinforces the shoulder joint.
Answer: B
The rotator cuff consists of which muscles?
A) Deltoid, pectoralis major, biceps brachii, triceps brachii
B) Supraspinatus, infraspinatus, teres minor, subscapularis
C) Latissimus dorsi, trapezius, rhomboid major, serratus anterior
D) Teres major, teres minor, deltoid, supraspinatus
Answer: B
Which muscle is primarily responsible for initiating arm abduction (first 15 degrees)?
A) Infraspinatus
B) Subscapularis
C) Supraspinatus
D) Teres minor
Answer: C
Which muscle helps with external rotation of the shoulder?
A) Subscapularis
B) Infraspinatus
C) Supraspinatus
D) Biceps brachii
Answer: B
The acromion is:
A) A bony projection on the top of the scapula.
B) A groove on the humerus where the biceps tendon sits.
C) A ligament connecting the coracoid process to the clavicle.
D) A cartilage ring that deepens the glenoid cavity.
Answer: A
The subscapularis muscle is located:
A) On the back of the shoulder, under the infraspinatus.
B) On the front of the shoulder, originating from the subscapular fossa.
C) On the lateral part of the shoulder.
D) In the bicipital groove.
Answer: B
The coracoacromial ligament connects the:
A) Clavicle to the acromion
B) Coracoid process to the acromion
C) Coracoid process to the humeral head
D) Acromion to the humeral head
Answer: B
What is the role of the labrum in the shoulder joint?
A) It stabilizes the joint by deepening the glenoid socket.
B) It helps with shoulder rotation.
C) It connects the scapula to the clavicle.
D) It prevents shoulder dislocations by covering the humeral head.
Answer: A
The lesser tuberosity of the humerus is the attachment site for which muscle?
A) Teres minor
B) Supraspinatus
C) Subscapularis
D) Infraspinatus
Answer: C
The bicipital groove is a structure located between:
A) The scapula and the humeral head.
B) The coracoid process and the acromion.
C) The greater and lesser tuberosities of the humerus.
D) The supraspinatus and infraspinatus muscles.
Answer: C
The AC joint (acromioclavicular joint) connects which two structures?
A) Glenoid and humeral head
B) Acromion and clavicle
C) Scapula and rib cage
D) Humeral head and subscapularis
Answer: B
The glenohumeral joint is:
A) The joint between the clavicle and scapula.
B) The joint where the humerus meets the glenoid of the scapula.
C) A small joint between the acromion and clavicle.
D) The joint connecting the rib cage to the shoulder blade.
Answer: B
The deltoid muscle is responsible for:
A) Flexion and internal rotation of the shoulder.
B) Abduction of the arm.
C) External rotation of the arm.
D) Stabilizing the shoulder joint.
Answer: B
What is the function of the coracoid process?
A) It deepens the socket of the glenoid cavity.
B) It provides attachment for muscles like the short head of the biceps and pectoralis minor.
C) It connects the clavicle to the acromion.
D) It allows for external rotation of the shoulder.
Answer: B
