Q: Which equation best represents the number of lobules in each breast, given that there are usually 15-20 lobules organized into lobes?

$$N_{lobules} = 15 \text{ to } 20$$

Question 1

Which section of the sternum serves as a clinical marker for the superior surface of the liver, the apex of the heart, and the central tendon of the diaphragm?

Accepted Answer

Xiphoid process

Question 2

A patient presents with a rib fracture that does not involve costal cartilage and ends in the muscles of the lower lumbar area. Which type of rib is most likely fractured?

Accepted Answer

Vertebral (floating) rib

Question 3

Which ribs are classified as 'false ribs' and share their costal cartilage with rib 7?

Accepted Answer

Ribs 8-10

Question 4

During auscultation, the sternal angle is used to locate the second rib. Why is this clinically important?

Accepted Answer

It helps identify the second intercostal space, where two major heart valves are heard.

Question 5

Which feature of a typical rib contains the vein, artery, and nerve (VAN)?

Accepted Answer

Costal groove

Question 6

Rib 6 forms joints with which thoracic vertebral bodies?

Accepted Answer

T5 and T6

Question 7

Which rib is flattened, shortest, and has grooves for subclavian vessels on its superior surface?

Accepted Answer

Rib 1

Question 8

Which ribs lack tubercles and have only a single joint with their respective vertebral bodies?

Accepted Answer

Ribs 1, 11, and 12

Question 9

The breast is supported from the skin and fascia by which structure?

Accepted Answer

Suspensory ligaments

Question 10

Which quadrant of the breast is most commonly associated with the spread of cancer cells to axillary lymph nodes?

Accepted Answer

Upper outer quadrant

Question 11

A patient has swelling of the limb distal to where lymph nodes were removed during breast cancer surgery. What is this condition called?

Accepted Answer

Lymphedema

Question 12

Which arteries supply blood to the breast?

Accepted Answer

Internal thoracic and lateral thoracic arteries

Question 13

Which equation best represents the number of lobules in each breast, given that there are usually 15-20 lobules organized into lobes?

Accepted Answer

$$N_{lobules} = 15 	ext{ to } 20$$

Question 14

Which of the following is NOT a typical sign or symptom of breast cancer?

Accepted Answer

Increased sweating in the axilla

Question 15

Which rib type directly attaches to the sternum via its own costal cartilage?

Accepted Answer

Vertebrosternal (true) ribs

Question 16

If a tumor is found in the breast and cancer cells spread to the opposite breast via lymphatic drainage, which lymph nodes are most likely involved?

Accepted Answer

Parasternal lymph nodes

Question 17

Which equation describes the relationship between the number of true ribs ($$N_{true}$$), false ribs ($$N_{false}$$), and total ribs ($$N_{total}$$)?

Accepted Answer

$$N_{total} = N_{true} + N_{false}$$

Question 18

Which rib forms a joint with only one vertebral body and does not have a tubercle?

Accepted Answer

Rib 11

Question 19

Which structure is a modified apocrine sweat gland found in both genders but functional only in females?

Accepted Answer

Breast

Question 20

A patient has a tumor in the upper outer quadrant of the left breast. Which lymph nodes are most likely to be the first site of metastasis?

Accepted Answer

Axillary lymph nodes

Skeleton of the Thorax and Structure of the Human Breast

Study Guide - Practice Questions

Study Guide - Flashcards