Q: Which of the following equations best represents the relationship between the volume of red marrow ($$V_{rm}$$), the number of marrow cavities ($$N_{mc}$$), and the average volume per cavity ($$V_{c}) in $$spongy bone?

$$V_{rm} = N_{mc} \times V_{c}$$

Question 1

Which of the following best describes the arrangement of lamellae in spongy bone?

Accepted Answer

Lamellae are laid down in trabeculae, forming a branching network of bony tissue.

Question 2

What is the primary function of canaliculi in spongy bone?

Accepted Answer

To facilitate communication and nutrient exchange between osteocytes within lacunae.

Question 3

A patient with impaired red marrow in their spongy bone would most likely experience which of the following?

Accepted Answer

Reduced production of blood cells, leading to anemia.

Question 4

Which structure is responsible for lining the internal surfaces of spongy bone, including the trabeculae?

Accepted Answer

Endosteum

Question 5

In spongy bone, osteocytes are located within which of the following?

Accepted Answer

Lacunae

Question 6

Which of the following best explains why spongy bone is well-suited for hematopoiesis?

Accepted Answer

It contains numerous marrow cavities filled with red marrow.

Question 7

A histological section of spongy bone reveals branching canaliculi. What is the main purpose of these structures?

Accepted Answer

To allow osteocytes to exchange nutrients and waste products.

Question 8

If the trabeculae of spongy bone were damaged, which function would be most directly affected?

Accepted Answer

The production of blood cells in the marrow cavities.

Question 9

Which of the following equations best represents the relationship between the volume of red marrow ($$V_{rm}$$), the number of marrow cavities ($$N_{mc}$$), and the average volume per cavity ($$V_{c}) in $$spongy bone?

Accepted Answer

$$V_{rm} = N_{mc} 	imes V_{c}$$

Question 10

Which of the following is NOT a feature of spongy bone?

Accepted Answer

Central canals surrounded by concentric lamellae

Question 11

A bone biopsy reveals a lack of canaliculi in the spongy bone. Which consequence is most likely?

Accepted Answer

Reduced communication and nutrient exchange between osteocytes

Question 12

Which of the following best describes the difference between spongy bone and compact bone?

Accepted Answer

Spongy bone has marrow cavities and branching trabeculae, while compact bone has central canals and concentric lamellae.

Question 13

Which of the following would most likely be found at the surface of a trabecula in spongy bone?

Accepted Answer

Endosteum

Question 14

A medical student is examining a slide of spongy bone and notices small blood vessels within the marrow cavities. What is the significance of these vessels?

Accepted Answer

They supply oxygen and nutrients to the red marrow for hematopoiesis.

Question 15

Which of the following best explains the structural advantage of trabeculae in spongy bone?

Accepted Answer

They provide a lightweight yet strong framework that supports bone under stress.

Question 16

If the number of canaliculi branching from each lacuna increases, what is the most likely effect on osteocyte function?

Accepted Answer

Osteocytes will have improved communication and nutrient exchange.

Question 17

Which of the following equations represents the total surface area ($$A_{t}) of $$trabeculae if each trabecula has an average surface area ($$A_{avg}) $$and there are $$n$$ trabeculae?

Accepted Answer

$$A_{t} = n 	imes A_{avg}$$

Question 18

Which of the following is a critical difference in the location of osteocytes in spongy bone compared to compact bone?

Accepted Answer

In spongy bone, osteocytes are located within lacunae in trabeculae; in compact bone, they are within lacunae in concentric lamellae.

Question 19

Which of the following would most likely occur if the endosteum lining the trabeculae of spongy bone were damaged?

Accepted Answer

Impaired bone growth and remodeling within the spongy bone.

Histological Features of Spongy Bone

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