The Skeletal System: Crash Course Anatomy & Physiology #19

What is one important function of bones in the human body?

• Producing digestive enzymes

• Storing calcium and other minerals

• Filtering waste from the blood

• Generating electrical impulses for the brain

What is a significant effect of a microgravity environment on human bones?

• Increased bone density

• Faster bone regeneration

• Significant bone loss

• No noticeable change in bones

Which group of bones forms the main support structure of the body, including the skull, vertebral column, and rib cage?

• Appendicular bones

• Long bones

• Axial bones

• Irregular bones

What is the primary role of red bone marrow?

• Storing energy as fat

• Producing blood cells

• Protecting internal organs

• Providing flexibility to joints

What are the concentric tubes that make up osteons, and what are they primarily filled with?

• Central canals, filled with nerves

• Lacunae, filled with osteocytes

• Lamellae, filled with collagen fibers

• Osteoblasts, filled with calcium phosphate

Which type of bone cell is primarily responsible for building new bone tissue?

• Osteocytes

• Osteoclasts

• Osteoblasts

• Lacunae

What is the process called when old bone tissue is broken down and its components are released back into the blood?

• Apoptosis

• Resorption

• Ossification

• Mineralization

How does microgravity affect bone density?

• Osteoblasts increase bone formation, leading to increased bone density.

• Osteoclasts increase bone resorption, and osteoblasts decrease bone formation, leading to bone mass loss.

• Both osteoblasts and osteoclasts become inactive, maintaining bone density.

• Bone density increases due to the lack of gravitational stress.