Question 1

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

Accepted Answer

They break down bone matrix (resorption) to release minerals into the bloodstream.

Question 2

A patient has a fracture in the diaphysis of their femur. Which part of the bone is affected?

Accepted Answer

The shaft (long, tubular midsection) of the bone.

Question 3

Which of the following is an inorganic component of bone matrix that provides hardness and resistance to compression?

Accepted Answer

Calcium phosphate crystals (hydroxyapatite)

Question 4

During bone growth, which hormone raises blood calcium levels by stimulating osteoclasts to break down bone?

Accepted Answer

Parathyroid hormone (PTH)

Question 5

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

Accepted Answer

Bone forms directly from mesenchymal tissue, mainly in flat bones of the skull and mandible.

Question 6

A 12-year-old is experiencing rapid bone growth in length. Which region of the long bone is primarily responsible for this growth?

Accepted Answer

Metaphysis (epiphyseal plate)

Question 7

Which of the following is NOT a function of bone tissue?

Accepted Answer

Production of hormones that regulate blood glucose

Question 8

Which of the following best describes the structure and function of an osteon?

Accepted Answer

A central canal surrounded by concentric lamellae, providing strength and nutrient exchange in compact bone.

Question 9

A patient with vitamin D deficiency is likely to experience which of the following effects on bone?

Accepted Answer

Decreased calcium absorption, leading to weaker bones

Question 10

Which step in fracture repair involves the formation of a soft callus made of cartilage and connective tissue?

Accepted Answer

Fibrocartilaginous (soft) callus formation

Question 11

Which of the following best explains why compact bone is stronger than spongy bone?

Accepted Answer

Compact bone contains a dense outer layer with organized osteons, providing greater strength.

Question 12

A 65-year-old woman is diagnosed with osteoporosis. Which bone cell type is most likely overactive in her condition?

Accepted Answer

Osteoclasts

Question 13

Which of the following equations correctly represents the mineral component of bone matrix?

Accepted Answer

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

Question 14

Which hormone is responsible for lowering blood calcium levels by inhibiting osteoclast activity?

Accepted Answer

Calcitonin

Question 15

Which of the following best describes the role of the periosteum in bone growth and repair?

Accepted Answer

It contains osteoprogenitor cells that contribute to appositional growth and repair.

Question 16

A child with a thyroid hormone deficiency is likely to experience which effect on bone growth?

Accepted Answer

Delayed bone growth and reduced metabolic rate

Question 17

Which of the following is the correct order of steps in fracture repair?

Accepted Answer

Hematoma formation, fibrocartilaginous callus formation, bony callus formation, bone remodeling

Question 18

Which of the following statements about spongy bone is correct?

Accepted Answer

It consists of a porous, inner bone tissue network that contains red bone marrow.

Question 19

Which of the following best describes appositional growth in bones?

Accepted Answer

Growth in diameter by adding new bone to the surface

Question 20

A 30-year-old athlete has increased bone density due to regular weight-bearing exercise. Which process is most responsible for this adaptation?

Accepted Answer

Enhanced osteoblast activity and bone matrix deposition

Bone Structure, Function, and Development: Study Notes for Anatomy & Physiology

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