Question

u3t1: bone remodeling reading and questions

possible points: 4

bone remodeling

even after skeletal maturity has been attained, bone is constantly being resorbed and replaced with new bone in a process called bone remodeling. in this lifelong process, mature bone tissue is continually turned over, with about ten percent of the skeletal mass of an adult being remodeled each year. bone remodeling is carried out through the work of osteoclasts — which are bone cells that resorb bone and dissolve its minerals — and osteoblasts, which are bone cells that make new bone matrix.

match the following terms or descriptions:

• bone cells that make new bone tissue (matrix)
• bone remodeling
• bone cells that remove bone and dissolve its minerals
• number of years it takes for 100% of skeleton to turn over

options to drag and drop:

• 10
• process where bone is constantly removed and new bone laid down
• osteoclasts
• osteoblasts

Explanation:

🆕 New Concept Discovered: Bone Remodeling Dynamics
Understanding how bone tissue breaks down and rebuilds.

Step 1: Identify cells that make new bone tissue

According to the reading passage, osteoblasts are defined as "bone cells that make new bone matrix."

• Match: "Bone cells that make new bone tissue (matrix)" $

ightarrow$ osteoblasts

Step 2: Identify the process of bone replacement

The passage states that the lifelong process where "bone is constantly being resorbed and replaced with new bone" is called "bone remodeling."

• Match: "Bone remodeling" $

ightarrow$ Process where bone is constantly removed and new bone laid down

Step 3: Identify cells that remove bone

The text defines osteoclasts as "bone cells that resorb bone and dissolve its minerals." Resorb means to break down and absorb.

• Match: "bone cells that remove bone and dissolve its minerals" $

ightarrow$ osteoclasts

Step 4: Calculate the years for 100% skeletal turnover

The text states that "about ten percent of the skeletal mass of an adult being remodeled each year."

To find how many years it takes for $100\%$ of the skeleton to turn over:
\[ \frac{100\%}{10\% \text{ per year}} = 10 \text{ years} \]

• Match: "Number of years it takes for 100% of skeleton to turn over" $

ightarrow$ 10

Answer:

• Bone cells that make new bone tissue (matrix) $

ightarrow$ osteoblasts

• Bone remodeling $

ightarrow$ Process where bone is constantly removed and new bone laid down

• bone cells that remove bone and dissolve its minerals $

ightarrow$ osteoclasts

• Number of years it takes for 100% of skeleton to turn over $

ightarrow$ 10