Bone Blueprint
Growth & Repair
Joints & Movement
Calcium, Skin & Skeleton
100

Which mineral compound gives bone much of its hardness and resistance to compression?


  • Hydroxyapatite
100

What cartilage region near the end of a long bone permits growth in length?


  • Epiphyseal plate
100

The knee belongs to what freely movable structural class of joint?


  • Synovial joint
100

When extracellular calcium concentration exceeds intracellular concentration, which way does calcium diffuse across the membrane?


  • Into the cell
200

Bone tissue organized as a porous lattice of trabeculae is classified by what name?


  • Cancellous bone
200

Immediately after a fracture, what blood-filled collection forms at the injury site?


  • Hematoma
200

A joint between vertebral bodies is classified structurally as what type?


  • Cartilaginous joint
200

Which hormone is secreted in response to low blood calcium and acts to raise it?


  • Parathyroid hormone (PTH)


300

What is the name of the compact-bone unit formed by concentric lamellae surrounding a central canal?


  • Osteon
300

Before a fracture is mineralized, what fibrocartilage structure bridges the break?


  • Soft callus
300

Which synovial joint type primarily permits flexion and extension in one plane?


  • Hinge joint
300

A burn that damages the epidermis and part of the dermis is classified as what degree?



  • Second-degree burn
400

Which bone-forming cell synthesizes and deposits new bone matrix?


  • Osteoblast
400

After blood vessels invade and ossification replaces the soft callus, what structure forms?


  • Bony callus
400

At the atlantoaxial joint, rotation around a central axis identifies which synovial joint type?


  • Pivot joint
400

The skull, ribs, and vertebral column belong to which major division of the skeleton?


  • Axial skeleton
500

Which mature bone cell, housed in a lacuna, maintains the matrix surrounding it?


  • Osteocyte
500

Put the four major fracture-healing stages in order: remodeling, hematoma, bony callus, soft callus.


  • Hematoma → soft callus → bony callus → remodeling
500

Because articular cartilage lacks a direct blood supply, what fluid is moved across its surface during joint motion to help nourish it?


  • Synovial fluid
500

What are the microscopic channels that connect osteocytes with each other and with nearby blood-supply pathways?


  • Canaliculi