Q: If a person has a deficiency in collagen synthesis, which of the following equations best represents the effect on bone strength?

$$\text{Bone Strength} = \text{Calcium Salts} + \text{Collagen}$$

Question 1

Which of the following best describes the function of yellow bone marrow in adults?

Accepted Answer

It stores fat and is found mainly in the diaphysis of long bones.

Question 2

A patient presents with bones that are soft and bend easily. Laboratory tests reveal a deficiency in vitamin D. Which bone disease is most likely present, and what is the underlying cause?

Accepted Answer

Rickets; insufficient calcium and vitamin D leading to poor mineralization

Question 3

Which hormone is released when blood calcium levels drop too low, and what is its effect on bone cells?

Accepted Answer

Parathyroid hormone (PTH); increases osteoclast activity

Question 4

During bone remodeling, which of the following best describes the role of osteoclasts?

Accepted Answer

They break down bone tissue by secreting acids and enzymes.

Question 5

A 10-year-old child has an X-ray showing visible epiphyseal plates in the femur. What does this indicate about the child's bone growth?

Accepted Answer

The child is still capable of growing in height.

Question 6

Which of the following best explains why exercise can increase bone strength?

Accepted Answer

Exercise increases stress on bones, stimulating osteoblast activity and bone deposition.

Question 7

Which structural feature of compact bone allows for the delivery of nutrients to osteocytes?

Accepted Answer

Central (Haversian) canal

Question 8

A patient with brittle bones is diagnosed with osteogenesis imperfecta. Which component of bone is most likely deficient?

Accepted Answer

Collagen fibers

Question 9

Which of the following joints is classified as a diarthrosis and is characterized by a joint capsule filled with synovial fluid?

Accepted Answer

Knee joint

Question 10

If a person has a deficiency in collagen synthesis, which of the following equations best represents the effect on bone strength?

Accepted Answer

$$	ext{Bone Strength} = 	ext{Calcium Salts} + 	ext{Collagen}$$

Question 11

Which of the following best describes the periosteum?

Accepted Answer

A tough, fibrous membrane covering the exterior of bone, serving as an attachment point for tendons and ligaments.

Question 12

Which of the following is a correct pairing of joint type and example?

Accepted Answer

Amphiarthrosis – intervertebral disc joint

Question 13

A patient with hypercalcemia (high blood calcium) would most likely have increased secretion of which hormone, and what would be its effect?

Accepted Answer

Calcitonin; decreases osteoclast activity and increases calcium deposition in bone

Question 14

Which of the following best describes the function of articular cartilage?

Accepted Answer

It covers the ends of bones inside a joint capsule, reducing friction between opposing surfaces.

Question 15

Which of the following is the correct sequence of layers from superficial to deep in a long bone?

Accepted Answer

Periosteum, compact bone, spongy bone, endosteum, marrow

Question 16

Which of the following best explains the difference between red and yellow bone marrow?

Accepted Answer

Red marrow produces blood cells, while yellow marrow stores fat.

Question 17

A 65-year-old woman is diagnosed with osteoporosis. Which of the following best describes the pathophysiology of this condition?

Accepted Answer

Decreased bone mass due to increased osteoclast activity and/or decreased osteoblast activity.

Question 18

Which of the following best describes the microscopic structure of compact bone?

Accepted Answer

It is composed of osteons, which are cylindrical units with concentric lamellae surrounding a central canal.

Question 19

Which of the following equations best represents the relationship between bone remodeling and calcium homeostasis?

Accepted Answer

$$	ext{Bone Remodeling Rate} \propto |	ext{Blood Calcium Level} - 	ext{Set Point}|$$

Lecture 5 Guide

Guida di studio - Domande di pratica

Study guide - Flashcard