Question 1

Which of the following best describes the process of endochondral ossification?

Accepted Answer

Bone replaces a hyaline cartilage model, beginning at a primary ossification center.

Question 2

During the growth in length of long bones, which zone of the epiphyseal plate is responsible for rapid cell division and the formation of new cells upward?

Accepted Answer

Proliferation (growth) zone

Question 3

A 14-year-old male is experiencing a growth spurt. Which hormone is primarily responsible for stimulating his epiphyseal plate activity during this period?

Accepted Answer

Growth hormone

Question 4

Which of the following bones is formed by intramembranous ossification?

Accepted Answer

Temporal bone

Question 5

What is the correct sequence of zones in the epiphyseal plate from the epiphysis to the diaphysis?

Accepted Answer

Resting zone → Proliferation zone → Hypertrophic zone → Calcification zone → Ossification zone

Question 6

A patient has a genetic defect that prevents the formation of the primary ossification center in long bones. Which of the following is most likely to be affected?

Accepted Answer

Development of the diaphysis in the femur

Question 7

Which of the following statements about bone remodeling is correct?

Accepted Answer

Bone remodeling involves both bone deposit and bone resorption.

Question 8

If a child has a deficiency in thyroid hormone during development, what is the most likely effect on their bones?

Accepted Answer

Impaired growth and delayed skeletal development

Question 9

Which of the following best explains why bones stop growing in length after adolescence?

Accepted Answer

Epiphyseal plates thin and are completely ossified, leaving only the epiphyseal line.

Question 10

During appositional growth, which of the following best describes the process by which bones increase in width?

Accepted Answer

Osteoblasts in the periosteum secrete bone matrix on the external bone surface.

Question 11

A 17-year-old female has not yet experienced closure of her epiphyseal plates. Which of the following is most likely to be true?

Accepted Answer

She will continue to grow in height until the plates close.

Question 12

Which of the following is the correct formula for the rate of bone mass replaced per year in compact bone, given that compact bone is replaced every 10 years?

Accepted Answer

$$\frac{1}{10}$$

Question 13

Which of the following events occurs LAST during the process of intramembranous ossification?

Accepted Answer

Lamellar bone replaces woven bone, and red marrow appears.

Question 14

A 12-year-old boy has a tumor that causes excessive secretion of growth hormone. What is the most likely outcome if untreated?

Accepted Answer

Excessive lengthening of long bones resulting in gigantism

Question 15

Which of the following best describes the role of osteoclasts in bone remodeling?

Accepted Answer

Osteoclasts resorb bone tissue, breaking down the matrix.

Question 16

Which of the following is a direct result of the calcification zone in the epiphyseal plate?

Accepted Answer

Cartilage matrix calcifies, and chondrocytes die and deteriorate.

Question 17

A 16-year-old male has delayed closure of his epiphyseal plates. Which hormone imbalance is most likely responsible?

Accepted Answer

Deficiency of estrogen

Question 18

Which of the following best explains why bone remodeling is important throughout life?

Accepted Answer

It helps maintain bone strength and mineral homeostasis.

Question 19

Which of the following is a characteristic of woven bone formed during intramembranous ossification?

Accepted Answer

It is initially formed and later replaced by lamellar bone.

Question 20

A patient with a mutation that impairs osteoblast function would most likely experience which of the following?

Accepted Answer

Decreased bone formation and possible osteoporosis

Bone Development, Growth, and Remodeling: Study Notes for Anatomy & Physiology

Guida di studio - Domande di pratica

Study guide - Flashcard