$$\text{Bone circumference}_{new} = \text{Bone circumference}_{old} + \text{Osteoblast activity} - \text{Osteoclast activity}$$

$$\text{Bone mass}_{new} = \text{Bone mass}_{old} + \text{Physical stress}$$

Question 1

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

Accepted Answer

Production of hormones

Question 2

Which feature of a long bone is responsible for the production of blood cells?

Accepted Answer

Medullary cavity

Question 3

A bone classified as 'short' would most likely be found in which location?

Accepted Answer

Wrist (carpals)

Question 4

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

Accepted Answer

Osteoclast

Question 5

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

Accepted Answer

Spongy bone contains trabeculae, while compact bone contains osteons.

Question 6

Which structure is NOT part of the microscopic anatomy of an osteon?

Accepted Answer

Trabeculae

Question 7

During endochondral ossification, which event occurs FIRST?

Accepted Answer

Formation of a cartilage model

Question 8

A patient with a deficiency in vitamin D3 is most likely to experience which effect on their skeletal system?

Accepted Answer

Decreased calcium absorption leading to weaker bones

Question 9

Which equation best represents the relationship between parathyroid hormone (PTH) and blood calcium levels?

Accepted Answer

If $$[Ca$$^{2+}$$]_{blood}$$ decreases, then $$PTH$$ increases, leading to $$[Ca$$^{2+}$$]_{blood}$$ increase.

Question 10

Which step occurs LAST in the repair of a bone fracture?

Accepted Answer

Remodeling of the bone

Question 11

Which joint is classified as a diarthrosis and allows the greatest range of movement?

Accepted Answer

Shoulder (glenohumeral) joint

Question 12

Which structural feature is unique to synovial joints?

Accepted Answer

Joint cavity filled with synovial fluid

Question 13

Which of the following is NOT a natural factor that stabilizes synovial joints?

Accepted Answer

Presence of blood vessels

Question 14

Which movement is allowed by the hip joint but NOT by the knee joint?

Accepted Answer

Abduction

Question 15

Which equation best describes appositional growth of a long bone?

Accepted Answer

$$	ext{Bone circumference}_{new} = 	ext{Bone circumference}_{old} + 	ext{Osteoblast activity} - 	ext{Osteoclast activity}$$

Question 16

Which joint is an example of a synarthrosis?

Accepted Answer

Suture between skull bones

Question 17

A patient with hyperparathyroidism would most likely exhibit which symptom related to their skeletal system?

Accepted Answer

Increased bone resorption and decreased bone density

Question 18

Which equation best represents the effect of exercise on bone mass?

Accepted Answer

$$	ext{Bone mass}_{new} = 	ext{Bone mass}_{old} + 	ext{Physical stress}$$

Question 19

Which of the following best describes the structural features of cartilaginous joints?

Accepted Answer

Bones are connected by cartilage and allow limited movement

Question 20

Which ligament is most important for stabilizing the knee joint during movement?

Accepted Answer

Anterior cruciate ligament (ACL)

Comprehensive Step-by-Step Guidance for Skeletal System and Joints (Biology 263 Exam 3 Study Guide)

Study Guide - Practice Questions