$$[Ca$$^{2+}$$]_{blood} \uparrow \Rightarrow \text{bone resorption} \uparrow$$

$$\text{Calcitonin} \uparrow \Rightarrow [Ca$$^{2+}$$]_{blood} \downarrow$$

Question 1

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

Accepted Answer

Production of hormones

Question 2

A patient with a deficiency in vitamin D is most likely to experience which of the following bone-related conditions?

Accepted Answer

Rickets, due to impaired calcium absorption

Question 3

Which type of bone cell is primarily responsible for bone resorption?

Accepted Answer

Osteoclast

Question 4

During endochondral ossification, which structure forms first in the developing long bone?

Accepted Answer

Hyaline cartilage model

Question 5

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 6

A fracture that results in bone fragments breaking through the skin is classified as:

Accepted Answer

Compound fracture

Question 7

Which region of the epiphyseal plate contains actively dividing chondrocytes responsible for bone lengthening?

Accepted Answer

Zone of proliferation

Question 8

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

Accepted Answer

Patella

Question 9

A patient with osteoporosis is most likely to have a deficiency in which component of bone matrix?

Accepted Answer

Inorganic matrix (hydroxyapatite)

Question 10

Which process is responsible for the formation of flat bones such as those in the skull?

Accepted Answer

Intramembranous ossification

Question 11

Which equation best represents the relationship between calcium ion concentration and bone resorption?

Accepted Answer

$$[Ca$$^{2+}$$]_{blood} \uparrow \Rightarrow 	ext{bone resorption} \uparrow$$

Question 12

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

Accepted Answer

Concentric rings called lamellae surrounding a central canal

Question 13

A child with achondroplasia will most likely have which of the following characteristics?

Accepted Answer

Short limbs and a disproportionately long trunk

Question 14

Which nutrient is required for osteoblasts to synthesize collagen fibers for the organic matrix of bone?

Accepted Answer

Vitamin C

Question 15

Which of the following best explains why bones continue to increase in width even after longitudinal growth has ceased?

Accepted Answer

Appositional growth by osteoblasts forming new circumferential lamellae

Question 16

Which of the following scenarios would most likely stimulate bone deposition?

Accepted Answer

Increased tension and compression from weight-bearing exercise

Question 17

Which equation correctly represents the effect of calcitonin on blood calcium levels?

Accepted Answer

$$	ext{Calcitonin} \uparrow \Rightarrow [Ca$$^{2+}$$]_{blood} \downarrow$$

Question 18

Which of the following is a correct sequence of events in fracture healing?

Accepted Answer

Hematoma formation, soft callus formation, bone callus formation, bone remodeling

Question 19

Which of the following best describes the role of osteocytes in bone tissue?

Accepted Answer

Maintain bone matrix and communicate with other bone cells via canaliculi

Question 20

A patient with excessive growth hormone secretion after epiphyseal plate closure will most likely develop:

Accepted Answer

Acromegaly, characterized by enlargement of bones and soft tissues

Bones and Bone Tissue: Structure and Function of the Skeletal System

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