Question 1

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

Accepted Answer

They resorb bone matrix by releasing acids and enzymes.

Question 2

A patient presents with muscle spasms and cardiac arrhythmias. Laboratory tests reveal a blood calcium level of 5 mg/dl. Which condition is most likely responsible for these symptoms?

Accepted Answer

Hypocalcemia

Question 3

Which equation represents the chemical formula for hydroxyapatite, the primary inorganic component of bone matrix?

Accepted Answer

$$\mathrm{Ca_{10}(PO_4$)_6(OH)_2}$$

Question 4

Which type of cartilage is most abundant in the human body and is found in articular surfaces, costal cartilages, and the nasal septum?

Accepted Answer

Hyaline cartilage

Question 5

During endochondral ossification, what is the sequence of events leading to the formation of the primary ossification center?

Accepted Answer

Chondrocytes hypertrophy, matrix calcifies, chondrocytes die, and periosteal bud invades.

Question 6

Which hormone is released when blood calcium levels decrease and acts to increase calcium levels by stimulating osteoclast activity, increasing intestinal absorption, and decreasing renal excretion?

Accepted Answer

Parathyroid hormone (PTH)

Question 7

A 12-year-old child suffers a fracture at the distal femur. Which structure is most likely affected, potentially impacting future bone growth?

Accepted Answer

Epiphyseal plate

Question 8

Which process describes the growth of cartilage from within, resulting in expansion of the tissue?

Accepted Answer

Interstitial growth

Question 9

According to Wolff’s Law, how does bone adapt to mechanical stress?

Accepted Answer

Bone grows or remodels in response to stresses placed on it.

Question 10

Which of the following is a function of the periosteum?

Accepted Answer

Provides insertion for tendons and ligaments

Question 11

A patient with vitamin D deficiency is likely to experience impaired absorption of which minerals from the gastrointestinal tract?

Accepted Answer

Calcium and phosphorus

Question 12

Which bone cell type acts as a strain sensor and maintains bone matrix by exchanging calcium and phosphorus?

Accepted Answer

Osteocytes

Question 13

Which of the following best explains why compact bone is able to resist torsion forces?

Accepted Answer

The arrangement of collagen fibers in adjacent lamellae in opposite directions

Question 14

Which of the following is TRUE regarding the chemical composition of bone?

Accepted Answer

Organic components contribute to bone flexibility and tensile strength.

Question 15

Which of the following bones is classified as a sesamoid bone?

Accepted Answer

Patella

Question 16

A patient with hyperparathyroidism is likely to exhibit which of the following symptoms due to elevated blood calcium levels?

Accepted Answer

Anorexia, confusion, and cardiac arrhythmias

Question 17

Which of the following best describes the process of bone remodeling?

Accepted Answer

Bone formation and bone resorption are coupled processes that occur throughout life.

Question 18

Which vitamin is essential for collagen synthesis and osteoblast differentiation during bone formation?

Accepted Answer

Vitamin C

Question 19

Which of the following is a plausible consequence of a fracture that fails to heal properly, resulting in a mal-union?

Accepted Answer

The bone heals in an incorrect anatomical position.

Question 20

Which of the following best describes the role of calcitonin in calcium homeostasis in adults?

Accepted Answer

It is a weak hypocalcemic agent that inhibits bone resorption and stimulates osteoblast activity.

Skeletal Tissue and Bone Physiology: Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard