Question 1

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

Accepted Answer

Production of hormones

Question 2

A patient suffers a fracture in which the bone breaks through the skin. What type of fracture is this?

Accepted Answer

Compound fracture

Question 3

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone

Question 4

During endochondral ossification, what is the original tissue that is replaced by bone?

Accepted Answer

Hyaline cartilage

Question 5

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

Accepted Answer

They secrete acids and enzymes to dissolve bone matrix.

Question 6

A 55-year-old woman is diagnosed with osteoporosis. Which of the following best explains the pathophysiology of her condition?

Accepted Answer

Osteoblast activity declines while osteoclast activity remains the same, leading to bone mass loss.

Question 7

Which bone type is correctly matched with its example?

Accepted Answer

Flat bone – parietal bone

Question 8

Which of the following statements about bone marrow is correct?

Accepted Answer

Red bone marrow is the site of hematopoiesis.

Question 9

A child is diagnosed with achondroplasia. Which of the following best describes this condition?

Accepted Answer

Epiphyseal cartilages of long bones grow slowly and fuse early, resulting in short limbs.

Question 10

Which of the following best describes the process of appositional growth in bones?

Accepted Answer

Bone increases in diameter as osteoblasts add matrix to the outer surface and osteoclasts erode the inner surface.

Question 11

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

Accepted Answer

Fracture hematoma forms, callus formation, callus replaced by bone, bone remodeling.

Question 12

Which of the following bone markings is correctly matched with its function?

Accepted Answer

Canal – passageway for blood vessels or nerves

Question 13

A patient presents with an exaggerated thoracic convexity and associated cervical concavity. What is the most likely diagnosis?

Accepted Answer

Kyphosis

Question 14

Which of the following best describes the composition of bone matrix?

Accepted Answer

Approximately two-thirds calcium phosphate and one-third collagen fibers

Question 15

Which of the following is the basic functional unit of compact bone?

Accepted Answer

Osteon (Haversian system)

Question 16

A 12-year-old boy is diagnosed with gigantism. Which of the following best explains the underlying cause?

Accepted Answer

Overproduction of growth hormone before puberty

Question 17

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

Accepted Answer

They allow cytoplasmic extensions of osteocytes to connect for nutrient and waste exchange.

Question 18

Which of the following would most likely result from a disruption in calcium homeostasis leading to a 35% decrease in blood calcium levels?

Accepted Answer

Potentially fatal consequences due to impaired muscle and nerve function

Question 19

Which of the following best describes the difference between compact bone and spongy bone?

Accepted Answer

Compact bone forms the wall of the diaphysis, while spongy bone fills the epiphyses and lines the marrow cavity.

Question 20

Which of the following best describes intramembranous ossification?

Accepted Answer

Bone develops within sheets of fibrous connective tissue, forming flat bones of the skull and mandible.

The Skeletal System: Structure, Function, and Classification

Guida di studio - Domande di pratica