Q: Which equation best represents the negative feedback loop for calcium homeostasis in bone tissue?

$Ca^{2+}_{blood} \xrightarrow{\text{decrease}} \text{Parathyroid hormone} \xrightarrow{\text{increase}} \text{Osteoclast activity} \xrightarrow{\text{increase}} Ca^{2+}_{blood}$

Q: Which equation best represents the process of bone fracture healing?

$\text{Hematoma} \rightarrow \text{Fibrocartilaginous callus} \rightarrow \text{Bony callus} \rightarrow \text{Bone remodeling}$

Question 1

Which of the following best describes the function of ligaments in the skeletal system?

Accepted Answer

They hold bones together at joints (articulations).

Question 2

Which type of cartilage is most likely to be found in the intervertebral discs and knee menisci, and what property does it provide?

Accepted Answer

Fibrocartilage; provides high compressibility and tensile strength.

Question 3

A patient presents with an exaggerated thoracic curvature resulting in a hunchback appearance. Which condition does this describe?

Accepted Answer

Kyphosis

Question 4

Which bone marking is a rounded articular projection that often forms part of a joint?

Accepted Answer

Condyle

Question 5

How does the adult skull differ from the fetal skull in terms of bone articulation?

Accepted Answer

The fetal skull has unfused sutures and fontanels, while the adult skull has fused sutures.

Question 6

Which of the following is a sesamoid bone, and what is its function?

Accepted Answer

Patella; forms within tendons in response to strain.

Question 7

A compound fracture is best described as:

Accepted Answer

A fracture where the skin and tissues around the bone are damaged.

Question 8

Which equation best represents the negative feedback loop for calcium homeostasis in bone tissue?

Accepted Answer

$Ca^{2+}_{blood} \xrightarrow{	ext{decrease}} 	ext{Parathyroid hormone} \xrightarrow{	ext{increase}} 	ext{Osteoclast activity} \xrightarrow{	ext{increase}} Ca^{2+}_{blood}$

Question 9

Which of the following bones is NOT part of the axial skeleton?

Accepted Answer

Pectoral girdle

Question 10

A patient with abnormal lateral curvature of the vertebral column is diagnosed with:

Accepted Answer

Scoliosis

Question 11

Which bone marking allows for the passage of blood vessels and nerves through a bone?

Accepted Answer

Foramen

Question 12

Which of the following is true regarding the vertebral column in a typical adult?

Accepted Answer

It contains 33 bones, including cervical, thoracic, lumbar, sacral, and coccygeal vertebrae.

Question 13

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

Accepted Answer

Resorb bone by secreting hydrogen ions and enzymes.

Question 14

Which of the following bones fuse to form the adult hip bone?

Accepted Answer

Ilium, ischium, and pubis

Question 15

Which of the following is a projection that serves as an attachment site for ligaments or tendons?

Accepted Answer

Crest

Question 16

Which equation best represents the process of bone fracture healing?

Accepted Answer

$	ext{Hematoma} ightarrow 	ext{Fibrocartilaginous callus} ightarrow 	ext{Bony callus} ightarrow 	ext{Bone remodeling}$

Question 17

Which of the following is true about the thoracic cage?

Accepted Answer

It consists of the sternum and 25 bones, including ribs.

Question 18

Which bone is unique in that it does not articulate directly with any other bone?

Accepted Answer

Hyoid bone

Question 19

Which of the following is a function of the nucleus pulposus in intervertebral discs?

Accepted Answer

Acts as a resilient shock absorber between vertebrae.

Question 20

Which of the following is a correct classification of the bones in the appendicular skeleton?

Accepted Answer

Pectoral girdles, upper limbs, hip bones, lower limbs

Chapter 7: The Skeletal System – Structure, Components, and Bone Markings

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