Q: Which of the following equations best represents the total number of bones in the upper limb (including the pectoral girdle) on one side of the body?

$$2 \text{ (pectoral girdle)} + 30 \text{ (upper limb)} = 32$$

Question 1

Which of the following statements best describes the function of the pectoral girdle in the appendicular skeleton?

Accepted Answer

It provides the only direct connection between the upper limb and the axial skeleton, allowing for a wide range of shoulder movement.

Question 2

A patient presents with a fracture to the only long bone that lies in a horizontal position in the human body. Which bone is most likely fractured?

Accepted Answer

Clavicle

Question 3

Which region of the clavicle articulates with the sternum?

Accepted Answer

Sternal (medial) end

Question 4

The glenoid cavity of the scapula serves as the articulation point for which bone?

Accepted Answer

Humerus

Question 5

A patient has difficulty abducting their arm at the shoulder joint. Which anatomical feature is most likely involved in this limitation?

Accepted Answer

Glenoid cavity of the scapula

Question 6

Which of the following correctly lists the bones of the upper limb from proximal to distal?

Accepted Answer

Humerus, radius and ulna, carpals, metacarpals, phalanges

Question 7

The head of the humerus articulates with which structure to form the shoulder joint?

Accepted Answer

Glenoid cavity of the scapula

Question 8

Which anatomical feature is found on the distal end of the ulna and is a distinguishing process?

Accepted Answer

Styloid process

Question 9

A patient falls on an outstretched hand and fractures the bone that is found on the lateral side of the forearm. Which bone is most likely fractured?

Accepted Answer

Radius

Question 10

Which of the following statements about the carpal bones is correct?

Accepted Answer

There are 8 carpal bones arranged in two rows in each wrist.

Question 11

The thumb (pollex) is unique among the manual phalanges because:

Accepted Answer

It has only two phalanges: proximal and distal.

Question 12

Which bone forms the posterior and inferior portion of the hip bone?

Accepted Answer

Ischium

Question 13

A patient is diagnosed with a fracture of the bone that forms the superior part of the hip bone and meets both the ischium and pubis. Which bone is fractured?

Accepted Answer

Ilium

Question 14

Which of the following best describes the articulation at the acromioclavicular joint?

Accepted Answer

It is formed by the acromion process of the scapula and the lateral end of the clavicle.

Question 15

If a person loses function in the conoid tubercle of the clavicle, which of the following is most likely affected?

Accepted Answer

Attachment of ligaments that stabilize the clavicle and scapula

Question 16

Which of the following equations best represents the total number of bones in the upper limb (including the pectoral girdle) on one side of the body?

Accepted Answer

$$2 	ext{ (pectoral girdle)} + 30 	ext{ (upper limb)} = 32$$

Question 17

A patient has a dislocation at the joint where the humerus articulates with the scapula. Which joint is affected, and what is the clinical significance?

Accepted Answer

The glenohumeral joint; it is the most mobile and frequently dislocated joint in the body.

Question 18

Which of the following best explains why the thumb has greater mobility than the other fingers?

Accepted Answer

The first metacarpal bone is not bound tightly to the other metacarpals, allowing for a range of motion crucial for opposition.

Question 19

Which anatomical feature of the ulna forms the bony tip of the elbow?

Accepted Answer

Olecranon process

Question 20

A patient presents with pain at the wrist after a fall. Imaging reveals a fracture at the distal end of the radius. Which joint is most likely affected?

Accepted Answer

Radiocarpal joint

Study Notes: The Appendicular Skeleton (Skeletal System III)

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