Question 1

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

Accepted Answer

Production of hormones

Question 2

A patient presents with a fracture in which the bone is broken into several small pieces between two large segments. What type of fracture is this?

Accepted Answer

Comminuted

Question 3

Which bone cell is primarily responsible for breaking down bone tissue during bone remodeling?

Accepted Answer

Osteoclast

Question 4

During endochondral ossification, what is the role of the periosteal collar?

Accepted Answer

It provides a bone-producing layer containing osteoblasts around the diaphysis.

Question 5

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone

Question 6

A 10-year-old child has a partial fracture in which only one side of the bone is broken. What is the most likely type of fracture?

Accepted Answer

Greenstick

Question 7

Which of the following best describes the function of canaliculi in compact bone?

Accepted Answer

They connect osteocytes in lacunae to each other and to the central canal.

Question 8

Which bone classification includes the patella and certain bones found in tendons?

Accepted Answer

Sesamoid bones

Question 9

A patient with osteoporosis is at increased risk for which of the following?

Accepted Answer

Decreased bone mass and increased fracture risk

Question 10

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

Accepted Answer

Growth in the width/diameter of the bone due to activity in the periosteum and endosteum

Question 11

Which of the following bone markings is defined as a 'hole through bone'?

Accepted Answer

Foramen

Question 12

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

Accepted Answer

Hematoma forms → Cartilage callus forms → Bony callus forms → Bone remodeling occurs

Question 13

Which of the following statements about osteocytes is TRUE?

Accepted Answer

They are mature bone cells located in lacunae that maintain bone tissue.

Question 14

A patient with abnormally low blood calcium levels is diagnosed with hypocalcemia. Which hormone would be secreted to correct this imbalance?

Accepted Answer

Parathyroid hormone

Question 15

Which of the following best describes the structure and function of the osteon (Haversian system)?

Accepted Answer

It is the structural unit of compact bone, consisting of concentric lamellae around a central canal.

Question 16

Which of the following is a correct description of endochondral ossification?

Accepted Answer

Bone forms by replacing a cartilage model, with primary ossification in the diaphysis and secondary in the epiphyses.

Question 17

A patient has a fracture in which the broken bone tears through the skin. What is the correct term for this type of fracture?

Accepted Answer

Open (or compound) fracture

Question 18

Which of the following bone markings is a prominent rounded surface, such as the head of the femur?

Accepted Answer

Head

Question 19

Which of the following best describes the function of trabeculae in spongy bone?

Accepted Answer

They provide maximum strength with minimal mass by forming a lattice-like network.

Question 20

A 25-year-old athlete experiences a twisting injury to the leg, resulting in a fracture. Which type of fracture is most likely?

Accepted Answer

Spiral fracture

Skeletal System: Structure, Function, and Bone Physiology

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