Question 1

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

Accepted Answer

Production of digestive enzymes

Question 2

A patient presents with a broken femur. Which type of bone growth is most responsible for the lengthening of this bone during childhood?

Accepted Answer

Longitudinal growth at the epiphyseal plate

Question 3

Which cell type is primarily responsible for bone resorption during remodeling?

Accepted Answer

Osteoclasts

Question 4

During endochondral ossification, which tissue model is replaced by bone?

Accepted Answer

Hyaline cartilage

Question 5

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

Accepted Answer

Collagen fibers, glycoproteins, and proteoglycans

Question 6

A deficiency in which component would most likely result in bones that are brittle and easily fractured?

Accepted Answer

Collagen fibers in the organic matrix

Question 7

Which structure in compact bone contains blood vessels and nerves and runs parallel to the long axis of the bone?

Accepted Answer

Central (Haversian) canal

Question 8

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

Accepted Answer

Intramembranous ossification

Question 9

A child has a genetic disorder affecting the zone of proliferation in the epiphyseal plate. What is the most likely consequence?

Accepted Answer

Reduced bone lengthening

Question 10

Which hormone is released in response to low blood calcium levels and stimulates osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 11

Which equation best represents the chemical formula for hydroxyapatite, the main inorganic component of bone?

Accepted Answer

$$Ca_5$$($$PO_4)_3OH$

Question 12

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

Accepted Answer

Hematoma forms, fibroblasts and chondroblasts build a soft callus, osteoblasts build new bone

Question 13

Which type of cartilage is found covering the ends of bones at movable joints?

Accepted Answer

Hyaline cartilage

Question 14

Which of the following best explains why bone is both strong and flexible?

Accepted Answer

Bone contains collagen fibers and hydroxyapatite crystals

Question 15

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

Accepted Answer

Patella

Question 16

A patient with osteoporosis has increased activity of which cell type?

Accepted Answer

Osteoclasts

Question 17

Which of the following best describes appositional growth in bones?

Accepted Answer

Bone is deposited on the surface, increasing thickness

Question 18

Which structure allows osteocytes to communicate and exchange nutrients within compact bone?

Accepted Answer

Canaliculi

Question 19

Which of the following is true regarding the epiphyseal plate during adolescence?

Accepted Answer

Cells in the epiphyseal plate die off and are replaced by bone

Question 20

Which of the following best describes the role of osteoblasts?

Accepted Answer

Bone-forming cells

Skeletal System: Structure, Function, and Development

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