Bone Cells: Osteoblasts, Osteocytes, Osteoclasts

Flashcards covering the three main bone cell types (osteoblasts, osteocytes, osteoclasts), their roles, locations, and their effects on calcium distribution between blood and bone.

What is the primary function of osteoblasts in bone tissue?

They are bone-forming cells that build new bone and move calcium from the blood into the bone.

What effect do osteoblasts have on blood calcium?

They decrease blood calcium by moving calcium into the bone.

Where do osteocytes reside in bone?

In lacunae (small cavities) within the bone matrix.

What is the role of osteocytes in bone maintenance?

They act as organizers/maintainers, helping regulate bone remodeling and signaling.

What is the primary function of osteoclasts in bone tissue?

They are bone-resorbing cells that break down bone and release calcium into the blood.

What happens to blood calcium and bone calcium when osteoclasts are active?

Blood calcium increases; bone calcium decreases.

Why is the blood-vs-bone calcium distinction important in this lecture?

Calcium management is central to bone health and is regulated by osteoblasts and osteoclasts; this balance is a recurring theme in the course.