Question 1

Which of the following is NOT a primary function of the skeletal system?

Accepted Answer

Hormone secretion

Question 2

A patient suffers a fracture in the diaphysis of their femur. Which structure is most likely to be directly affected?

Accepted Answer

Medullary (marrow) cavity

Question 3

Which bone cell type is responsible for bone resorption and contains lysosomal enzymes and acids that digest bone matrix?

Accepted Answer

Osteoclast

Question 4

The process by which mesenchymal stem cells differentiate into osteoblasts is essential for which physiological process?

Accepted Answer

Bone formation (ossification)

Question 5

Which equation best represents the formation of hydroxyapatite, the main mineral in bone matrix?

Accepted Answer

$$Ca_3$$($$PO_4)_2 + Ca(OH)_2$$ \rightarrow $$Ca_5$$($$PO_4)_3OH$

Question 6

Which structure provides a route for blood vessels, nerves, and lymphatic vessels from the periosteum to the osteon in compact bone?

Accepted Answer

Volkmann's canal

Question 7

A deficiency in osteoclast activity would most likely result in which of the following conditions?

Accepted Answer

Excessively dense bones (osteopetrosis)

Question 8

Which part of a long bone is covered by articular cartilage and is involved in forming joints?

Accepted Answer

Epiphysis

Question 9

Which of the following best describes the function of canaliculi in bone tissue?

Accepted Answer

They allow communication and nutrient exchange between osteocytes.

Question 10

A patient with anemia is found to have decreased hematopoiesis. Which bone region is most likely affected?

Accepted Answer

Red marrow in the spongy bone of the epiphysis

Question 11

Which of the following statements about spongy bone is TRUE?

Accepted Answer

It is lighter than compact bone and contains trabeculae.

Question 12

Which structure surrounds the medullary cavity and serves as an attachment point for ligaments and tendons?

Accepted Answer

Periosteum

Question 13

During bone remodeling, which cell type is responsible for synthesizing and secreting collagen fibers and other organic components of the bone matrix?

Accepted Answer

Osteoblasts

Question 14

Which canal runs longitudinally through the center of each osteon and contains blood vessels and nerves?

Accepted Answer

Haversian canal

Question 15

If a mutation prevents the formation of hydroxyapatite crystals, which process would be most directly impaired?

Accepted Answer

Bone calcification

Question 16

Which of the following best explains why compact bone is found in the diaphysis of long bones?

Accepted Answer

It resists stress produced by weight and movement.

Question 17

Which of the following is the correct sequence of bone cell differentiation from a mesenchymal stem cell?

Accepted Answer

Mesenchymal stem cell $$\rightarrow$$ Osteoblast $$\rightarrow$$ Osteocyte

Question 18

Which structure is responsible for lining the medullary cavity and contains osteogenic cells?

Accepted Answer

Endosteum

Question 19

A child is diagnosed with rickets, a disease characterized by soft bones. Which component of bone matrix is most likely deficient?

Accepted Answer

Hydroxyapatite (crystallized mineral salts)

Question 20

Which of the following best describes the role of concentric lamellae in compact bone?

Accepted Answer

They surround the Haversian canal and strengthen the osteon.

The Skeletal System: Structure and Function of Bone Tissue

Guida di studio - Domande di pratica

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