Q: Which equation best represents the relationship between bone mass and age, assuming bone formation exceeds resorption in youth and reverses in old age?

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

Question 1

Which type of cartilage is found at the articular surfaces of joints and is most responsible for providing smooth movement between bones?

Accepted Answer

Hyaline cartilage

Question 2

A patient presents with bowed legs and bone deformities. Laboratory tests reveal low vitamin D and calcium levels. Which disease is most likely responsible for these symptoms?

Accepted Answer

Rickets

Question 3

Which of the following is a function of osteoclasts in bone tissue?

Accepted Answer

Resorb bone and release calcium into the blood

Question 4

Which bone cell type acts as a mechanosensor, detecting strain and communicating with other bone cells to coordinate remodeling?

Accepted Answer

Osteocyte

Question 5

A 70-year-old woman suffers a hip fracture after a minor fall. Her bone density scan shows significant loss of spongy bone in the femoral neck. Which process most likely exceeds bone formation in her condition?

Accepted Answer

Bone resorption

Question 6

Which hormone is primarily responsible for increasing blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone

Question 7

During bone repair, which stage involves the formation of a fibrocartilaginous callus that bridges the broken bone ends?

Accepted Answer

Fibrocartilaginous callus formation

Question 8

Which of the following best describes the arrangement of compact and spongy bone in a typical long bone?

Accepted Answer

Compact bone forms the outer shaft, spongy bone is found in the epiphyses

Question 9

Which equation correctly represents the normal range of blood calcium concentration in adults?

Accepted Answer

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

Question 10

Which bone marking is best described as a bowl-like or groove-like cut-out that serves as a passageway for vessels and nerves?

Accepted Answer

Fossa

Question 11

A young athlete experiences increased bone mass after starting a weight-bearing exercise program. Which physiological principle explains this adaptation?

Accepted Answer

Bone deposition increases in response to mechanical stress

Question 12

Which of the following is a major organic component of bone matrix that contributes to bone's tensile strength?

Accepted Answer

Collagen fibers

Question 13

Which process describes the formation of bone tissue from a fibrous membrane, as seen in the development of flat bones like the skull?

Accepted Answer

Intramembranous ossification

Question 14

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

Accepted Answer

Protein synthesis

Question 15

Which bone cell type is derived from hematopoietic stem cells and is responsible for bone resorption?

Accepted Answer

Osteoclast

Question 16

A fracture in which the bone ends are out of normal alignment and the skin is penetrated is best described as:

Accepted Answer

Displaced, open (compound) fracture

Question 17

Which of the following factors increases the risk of osteoporosis in postmenopausal women?

Accepted Answer

Decreased estrogen levels

Question 18

Which equation best represents the relationship between bone mass and age, assuming bone formation exceeds resorption in youth and reverses in old age?

Accepted Answer

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

Question 19

Which of the following best explains why weight-bearing exercise helps prevent osteoporosis?

Accepted Answer

It stimulates bone deposition by osteoblasts in response to mechanical stress

Question 20

Which structure in compact bone contains blood vessels and nerve fibers and runs parallel to the long axis of the bone?

Accepted Answer

Central (Haversian) canal

Lecture 6

Guida di studio - Domande di pratica

Study guide - Flashcard