$$\text{Bone Mass} \propto \text{Mechanical Stress}$$

$$9 \leq [\text{Ca}^{2+}] \leq 11 \text{ mg}/100\text{ mL}$$

Question 1

Which function of the skeletal system is directly responsible for maintaining calcium homeostasis in the body?

Accepted Answer

Mineral storage and release

Question 2

A patient presents with a fracture in the femur. Which process is most likely to occur first during bone repair?

Accepted Answer

Formation of a hematoma

Question 3

During adolescence, which hormone is primarily responsible for stimulating the activity of the epiphyseal plate?

Accepted Answer

Growth hormone

Question 4

If blood calcium levels drop below $$9	ext{ mg}/100	ext{ mL}$$, which sequence of events occurs to restore balance?

Accepted Answer

Parathyroid glands release PTH, stimulating osteoclasts to degrade bone matrix

Question 5

Which component of the bone matrix provides flexibility and prevents bones from snapping under stress?

Accepted Answer

Collagen fibers

Question 6

A 20-year-old male has not yet experienced epiphyseal plate closure. What is the most likely consequence?

Accepted Answer

Continued bone lengthening

Question 7

Which process describes the thickening of bones in response to increased mechanical stress?

Accepted Answer

Appositional growth

Question 8

A patient with a displaced, open fracture of the radius will most likely require which treatment?

Accepted Answer

Open reduction with surgical pins or wires

Question 9

Which of the following best explains why bones are stronger in individuals who exercise regularly?

Accepted Answer

Exercise stimulates osteoblasts to deposit more bone matrix

Question 10

Which equation best represents the relationship between bone mass and mechanical stress?

Accepted Answer

$$	ext{Bone Mass} \propto 	ext{Mechanical Stress}$$

Question 11

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

Accepted Answer

Producing blood cells

Question 12

Which scenario would most likely result in a complete, displaced, open fracture?

Accepted Answer

A car accident causes a bone to break through the skin and shift out of alignment

Question 13

Which step in bone repair involves the formation of new trabeculae within the callus?

Accepted Answer

Bony callus formation

Question 14

Which hormone is responsible for modulating the activity of growth hormone to ensure proper bone proportions?

Accepted Answer

Thyroid hormone

Question 15

Which of the following best describes the role of osteocalcin produced by bone tissue?

Accepted Answer

Regulates insulin secretion and energy expenditure

Question 16

Which equation represents the calcium homeostasis range in blood?

Accepted Answer

$$9 \leq [	ext{Ca}^{2+}] \leq 11 	ext{ mg}/100	ext{ mL}$$

Question 17

Which of the following is a plausible consequence of excessive parathyroid hormone (PTH) secretion?

Accepted Answer

Increased bone resorption and elevated blood calcium

Question 18

Which process is responsible for the replacement of cartilage with bone during growth?

Accepted Answer

Endochondral ossification

Question 19

Which of the following best explains why bone remodeling is necessary during growth?

Accepted Answer

To maintain the bone's shape as it lengthens

Skeletal, Muscular, and Nervous System Essentials: Structure, Function, and Physiology

Study Guide - Practice Questions