Bone Cells and Conditions

The video tutorial explains the structure of bones, focusing on osteocytes, the cells that form bones. It discusses osteoporosis, a condition where bones become fragile due to a decrease in osteocyte density, often occurring with age. The tutorial introduces two types of bone cells: osteoblasts, which create new bone cells, and osteoclasts, which break down bone cells. As people age, osteoclast activity increases, leading to reduced bone density and increased fragility.

What are the basic units of bone cells called?

• Osteocytes

• Osteoblasts

• Osteoclasts

• Osteons

What condition is characterized by fragile bones due to low bone density?

• Scoliosis

• Rickets

• Arthritis

• Osteoporosis

Which cells are responsible for producing new bone cells?

• Fibroblasts

• Osteoblasts

• Chondrocytes

• Osteoclasts

What is the primary function of osteoblasts?

• To break down bone tissue

• To transport nutrients

• To store calcium

• To produce new osteocytes

Which cells are known as the 'criminals' that break down bone tissue?

• Osteoclasts

• Osteocytes

• Osteoblasts

• Chondrocytes

What happens to the activity of osteoclasts as we age?

• It stops completely

• It increases

• It remains the same

• It decreases

At what age does bone density typically start to decrease?

• 30 years

• 20 years

• 40 years

• 50 years

What is the result of increased osteoclast activity compared to osteoblast activity?

• Increased bone density

• Decreased bone density

• Improved bone flexibility

• No change in bone density

What is the role of osteoclasts in bone health?

• To build new bone tissue

• To break down old bone tissue

• To transport oxygen

• To store fat

What is the condition called when bones become very fragile in old age?

• Osteoporosis

• Osteoarthritis

• Osteomyelitis

• Osteomalacia