Question 1

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

Accepted Answer

Hormone secretion

Question 2

Which specialized bone cell is responsible for bone resorption, and what is its origin?

Accepted Answer

Osteoclast; derived from white blood cell lineage

Question 3

A patient presents with bowed legs and frequent fractures. Lab results show low calcium and vitamin D. What is the most likely diagnosis?

Accepted Answer

Osteomalacia (rickets in children)

Question 4

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

Accepted Answer

Compact bone contains osteons; spongy bone contains trabeculae

Question 5

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 6

A 6-year-old child fractures her left tibia at the diaphysis. Why is this location particularly concerning?

Accepted Answer

It is highly vascular, increasing risk of fat embolism

Question 7

Which of the following is a correct sequence of events in endochondral ossification?

Accepted Answer

Cartilage model forms → primary ossification center develops → secondary ossification centers form

Question 8

Which of the following is a structural classification of joints that allows the most movement?

Accepted Answer

Synovial

Question 9

Which of the following best describes the role of the epiphyseal plate?

Accepted Answer

It allows for longitudinal growth of bone

Question 10

A patient with a torn anterior cruciate ligament (ACL) will most likely experience which of the following?

Accepted Answer

Instability of the knee joint, especially during anterior movement of the tibia

Question 11

Which of the following is a correct pairing of bone cell and its function?

Accepted Answer

Osteocyte – maintains bone matrix

Question 12

Which of the following is a characteristic of hyaline cartilage?

Accepted Answer

Forms the articular surfaces of long bones

Question 13

Which of the following equations correctly represents the normal range of blood calcium concentration?

Accepted Answer

$$9-11\ \mathrm{mg}/100\ \mathrm{ml}$$

Question 14

Which of the following is a difference between bone and cartilage?

Accepted Answer

Bone contains blood vessels; cartilage does not

Question 15

Which of the following is a correct description of a synchondrosis?

Accepted Answer

A joint with hyaline cartilage, allowing no movement

Question 16

Which of the following is a correct sequence of the four stages of bone fracture healing?

Accepted Answer

Hematoma formation → soft callus formation → hard callus formation → remodeling

Question 17

Which of the following movements is defined as moving a limb away from the body midline in the frontal plane?

Accepted Answer

Abduction

Question 18

Which of the following is a risk factor for osteoporosis?

Accepted Answer

Menopause

Question 19

Which of the following best describes the function of the menisci in synovial joints?

Accepted Answer

Modify the shape of articulating surfaces and act as shock absorbers

Question 20

Which of the following hormones acts antagonistically to parathyroid hormone (PTH) in calcium regulation?

Accepted Answer

Calcitonin

Skeletal System: Structure, Function, and Joints

Study Guide - Practice Questions