$$10\text{Ca}^{2+} + 6\text{PO}_4$$^{3-}$$ + 2\text{OH}^- \rightarrow \text{Ca}_{10}(\text{PO}_4)_6(\text{OH})_2$$

Question 1

Which of the following best describes the primary function of the axial skeleton?

Accepted Answer

It forms the longitudinal axis of the body, providing support and protection for the brain, spinal cord, and thoracic organs.

Question 2

A bone with a small, boxy shape found in the wrist is classified as which type of bone?

Accepted Answer

Short bone

Question 3

Which bone marking is defined as a small, rounded projection and is commonly found where tendons attach to bones?

Accepted Answer

Tubercle

Question 4

What is the functional significance of the medullary cavity in a long bone?

Accepted Answer

It houses red and yellow bone marrow, which are involved in blood cell production and fat storage.

Question 5

Which cell type is responsible for producing new bone matrix during bone growth and repair?

Accepted Answer

Osteoblasts

Question 6

If the activity of osteoclasts exceeds that of osteoblasts in a bone, what will be the likely outcome?

Accepted Answer

Bone mass will decrease.

Question 7

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

Accepted Answer

It is organized into osteons with concentric lamellae around a central canal.

Question 8

During appositional bone growth, what happens to the medullary cavity?

Accepted Answer

It enlarges as osteoclasts remove bone matrix from the inner surface.

Question 9

Which process describes the replacement of a hyaline cartilage model with bone during development?

Accepted Answer

Endochondral ossification

Question 10

A child presents with abnormally short limbs but a normal-sized trunk. Which condition is most likely responsible?

Accepted Answer

Achondroplasia

Question 11

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 12

What is the primary difference between endochondral ossification and intramembranous ossification?

Accepted Answer

Endochondral ossification replaces a cartilage model with bone, while intramembranous ossification forms bone directly from mesenchymal tissue.

Question 13

A patient with a pituitary tumor before puberty is likely to develop which condition?

Accepted Answer

Gigantism

Question 14

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

Accepted Answer

Fracture hematoma formation → callus formation → spongy bone formation → compact bone formation

Question 15

Which organ system does NOT play a direct role in maintaining normal blood calcium levels?

Accepted Answer

Respiratory system

Question 16

A greenstick fracture is most likely to occur in which population and why?

Accepted Answer

Children, because their long bones have not fully ossified

Question 17

Which of the following equations best represents the formation of hydroxyapatite in bone matrix?

Accepted Answer

$$10	ext{Ca}^{2+} + 6	ext{PO}_4$$^{3-}$$ + 2	ext{OH}^- ightarrow 	ext{Ca}_{10}(	ext{PO}_4)_6(	ext{OH})_2$$

Question 18

Which bone marking would most likely be found at the site of a nerve or blood vessel passing through a bone?

Accepted Answer

Foramen

Question 19

A patient with abnormally low blood calcium would most likely exhibit which physical sign?

Accepted Answer

Muscle spasms and increased nerve excitability

Question 20

Which of the following best explains why bone injuries are usually painful?

Accepted Answer

Bones contain a high density of sensory nerves, especially in the periosteum.

Bones and Bone Structure: Study Notes for ANP College Students

Study Guide - Practice Questions