$$\text{Bone Mass} = \text{Bone Formation} - \text{Bone Resorption}$$

$$\text{Bone Thickness} = \text{Exercise Intensity} \times \text{Osteoblast Activity}$$

Question 1

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

Accepted Answer

Regulation of blood glucose

Question 2

The combination of collagen fibers and calcium phosphate crystals in bone tissue results in which property?

Accepted Answer

Bones are strong, somewhat flexible, and highly resistant to shattering

Question 3

Which bone classification is best exemplified by the vertebrae?

Accepted Answer

Irregular bone

Question 4

What is the main structural difference between compact bone and spongy bone?

Accepted Answer

Compact bone is solid and smooth, composed of osteons; spongy bone is made of branched plates called trabeculae

Question 5

Which cell type is responsible for breaking down bone matrix during bone remodeling?

Accepted Answer

Osteoclast

Question 6

During endochondral ossification, what is the first step in the formation of a long bone?

Accepted Answer

Chondrocytes at the center of the growing cartilage enlarge and die

Question 7

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 8

A patient presents with short, stocky limbs but a normal-sized trunk. Which skeletal disorder is most likely responsible?

Accepted Answer

Achondroplasia

Question 9

Which equation best represents the relationship between bone mass and calcium exchange during bone remodeling?

Accepted Answer

$$	ext{Bone Mass} = 	ext{Bone Formation} - 	ext{Bone Resorption}$$

Question 10

Which joint type allows the greatest range of movement?

Accepted Answer

Diarthrotic (synovial)

Question 11

What is the primary function of synovial fluid in a synovial joint?

Accepted Answer

To lubricate the joint and reduce friction

Question 12

Which bone growth process is responsible for increasing the diameter of bones?

Accepted Answer

Appositional growth

Question 13

A fracture that breaks through the skin is classified as which type?

Accepted Answer

Open (compound) fracture

Question 14

Which vitamin is essential for the absorption and transport of calcium and phosphate ions during bone development?

Accepted Answer

Vitamin D

Question 15

Which equation describes the effect of exercise on bone thickness and strength?

Accepted Answer

$$	ext{Bone Thickness} = 	ext{Exercise Intensity} 	imes 	ext{Osteoblast Activity}$$

Question 16

Which of the following best describes osteoporosis?

Accepted Answer

A disease resulting in loss of bone density and mass, making bones porous

Question 17

Which joint structure is responsible for absorbing shock and reducing friction between bones?

Accepted Answer

Articular cartilage

Question 18

Which hormone stimulates ossification and closure of the epiphyseal plate?

Accepted Answer

Estrogen

Question 19

Which of the following is a real-life consequence of abnormal calcium homeostasis?

Accepted Answer

Increased risk of bone fractures due to osteoporosis

Question 20

Rheumatoid arthritis is best described as:

Accepted Answer

An autoimmune disorder where the body attacks the synovial joint membrane

The Skeletal System: Structure, Function, and Disorders

Study Guide - Practice Questions