Chemical Composition of Calcium Phosphate

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Questions and Answers

What is the primary form of calcium phosphate?

Hydroxyapatite (correct)

Calcium nitrate

Calcium sulfate

Calcite

Which of the following ions is NOT typically found with calcium phosphate?

Aluminum (correct)

Magnesium

Sodium

Ferrous

What is the other compound that is often found with calcium phosphate?

Calcium nitrate

Calcium carbonate (correct)

Calcium sulfate

Calcium oxide

What is the characteristic shape of calcium phosphate?

Crystals Signup and view all the answers

Which of the following is a common associate of calcium phosphate?

Magnesium Signup and view all the answers

What is the primary function of the periosteum?

To cover the external surfaces of bone Signup and view all the answers

Where is the periosteum located in relation to the bone?

On the external surfaces of bone Signup and view all the answers

What is the main role of the periosteum in relation to bone structure?

To cover the external surfaces of bone Signup and view all the answers

What is the periosteum's relationship with the bone surface?

It covers the bone surface Signup and view all the answers

Where does the periosteum primarily interact with the bone?

At the external surfaces of bone Signup and view all the answers

What is the function of the bone cells?

To form the unit of bone tissue Signup and view all the answers

What is the origin of the bone cells?

From osteoblasts Signup and view all the answers

What are the lacunae?

Cavities in the bone matrix Signup and view all the answers

What is the process by which osteoblasts get entrapped in the lacunae?

Ossification Signup and view all the answers

What is the result of osteoblasts getting entrapped in the lacunae?

Formation of bone tissue Signup and view all the answers

What is a characteristic of the osteoblasts?

They are multiple and irregularly arranged Signup and view all the answers

What happens to the temporary bone?

It is replaced by the secondary bone Signup and view all the answers

What is the arrangement of the osteoblasts?

They are irregularly arranged Signup and view all the answers

What is the characteristic of the bone tissue?

It is composed of multiple cells Signup and view all the answers

What is the fate of the temporary bone?

It is replaced by the secondary bone Signup and view all the answers

What surrounds the inner circumferential lamellae?

The Haversian canal Signup and view all the answers

Where are the circumferential lamellae located in relation to the bone marrow?

Below the bone marrow Signup and view all the answers

What is the characteristic structural unit in which circumferential lamellae are found?

Compact bone Signup and view all the answers

What is the relationship between the circumferential lamellae and the bone canal?

The bone canal is surrounded by circumferential lamellae Signup and view all the answers

Where are the circumferential lamellae found in relation to the endosteum?

Below the endosteum Signup and view all the answers

Study Notes

Bone Composition

Bone is composed of calcium phosphate (in the form of hydroxyapatite crystals) and calcium carbonate.
Other ions present in bone include sodium, magnesium, and ferrous ions.

Periosteum

The periosteum covers the external surfaces of bones.
It is a layer of cells that exhibit a characteristic underlying protein structure.
The periosteum is the unit of bone cells.

Bone Cells

Bone cells originate from osteoblasts.
When osteoblasts are trapped within lacunae (cavities), they become bone cells.
Bone cells are numerous and irregularly arranged.

Temporary Bone

Temporary bone is replaced later by secondary bone.
The temporary bone is characterized by circumferential lamellae that surround the central marrow cavity just beneath the endosteum.