BIO 265 Mod 5 - Skeletal System Questions with
Correct Answers
Functions of skeletal system Correct Answer ✓✓ Support, protection,
red blood cell production, mineral and fat storage, movement
Osteocytes Correct Answer ✓✓ Mature bone cells surrounded by matrix
Canaliculi Correct Answer ✓✓ Small channels that radiate through the
matrix of bone; connect lacunae with each other and blood vessels
Bone matrix Correct Answer ✓✓ Fills in space between rows of
lacunae; made up of H2O, proteins, mineral salts, cells
Composition bone matrix Correct Answer ✓✓ 2/3 weight of bone is
calcium phosphate, 1/3 weight collagen fibers and proteins
Lamella Correct Answer ✓✓ Layers of bony matrix
Osteoblasts Correct Answer ✓✓ Matrix secreting cells; bone "builders";
grab calcium and phosphorous from blood; secrete osteoid; become
osteocytes
Osteoid Correct Answer ✓✓ the unmineralized, organic portion of bone
matrix that forms prior to the maturation of bone tissue
, Osteoprogenitor Cells Correct Answer ✓✓ Mesenchymal stem cells
found in endosteum and periosteum; can produce more stem cells or
osteoblasts
Osteoclasts Correct Answer ✓✓ a large multinucleate bone cell that
absorbs bone tissue during growth and healing; bone "chewers"; send
calcium and phosphorus into blood
Osteolysis Correct Answer ✓✓ The breakdown of the mineral matrix of
bone; destruction of bone
Osteon Correct Answer ✓✓ Units of compact bone made up of layers of
lamellae
Haversian Canal (Central Canal) Correct Answer ✓✓ Large middle
channel that contains blood vessels, nerves, and lymphatic vessels in
osteon; waste and nutrients
Compact bone Correct Answer ✓✓ Hard, dense bone tissue that is
beneath the outer membrane of a bone; made up of calcium phosphate
Spongy bone Correct Answer ✓✓ Many small spaces; thick and
branchy; trabeculae (parallel struts); along stress lines; osteocytes are
irregularly spaced; contains red bone marrow;
Ends of long bones, pelvis, ribs vertebrae, skull
Correct Answers
Functions of skeletal system Correct Answer ✓✓ Support, protection,
red blood cell production, mineral and fat storage, movement
Osteocytes Correct Answer ✓✓ Mature bone cells surrounded by matrix
Canaliculi Correct Answer ✓✓ Small channels that radiate through the
matrix of bone; connect lacunae with each other and blood vessels
Bone matrix Correct Answer ✓✓ Fills in space between rows of
lacunae; made up of H2O, proteins, mineral salts, cells
Composition bone matrix Correct Answer ✓✓ 2/3 weight of bone is
calcium phosphate, 1/3 weight collagen fibers and proteins
Lamella Correct Answer ✓✓ Layers of bony matrix
Osteoblasts Correct Answer ✓✓ Matrix secreting cells; bone "builders";
grab calcium and phosphorous from blood; secrete osteoid; become
osteocytes
Osteoid Correct Answer ✓✓ the unmineralized, organic portion of bone
matrix that forms prior to the maturation of bone tissue
, Osteoprogenitor Cells Correct Answer ✓✓ Mesenchymal stem cells
found in endosteum and periosteum; can produce more stem cells or
osteoblasts
Osteoclasts Correct Answer ✓✓ a large multinucleate bone cell that
absorbs bone tissue during growth and healing; bone "chewers"; send
calcium and phosphorus into blood
Osteolysis Correct Answer ✓✓ The breakdown of the mineral matrix of
bone; destruction of bone
Osteon Correct Answer ✓✓ Units of compact bone made up of layers of
lamellae
Haversian Canal (Central Canal) Correct Answer ✓✓ Large middle
channel that contains blood vessels, nerves, and lymphatic vessels in
osteon; waste and nutrients
Compact bone Correct Answer ✓✓ Hard, dense bone tissue that is
beneath the outer membrane of a bone; made up of calcium phosphate
Spongy bone Correct Answer ✓✓ Many small spaces; thick and
branchy; trabeculae (parallel struts); along stress lines; osteocytes are
irregularly spaced; contains red bone marrow;
Ends of long bones, pelvis, ribs vertebrae, skull
