BIO 168 UPDATED EXAMS SCRIPT ALL
QUESTIONS AND ANSWERS SURE A+
✔✔Blood vessels and nerves run through the _____ in the center of the osteon. -
✔✔Haversian (central) canal
✔✔_____ are small cavities at the junction of the lamellae containing _____. -
✔✔Lacunae; osteocytes
✔✔_____ are hair-like canals connecting lacunae to each other and to the canal
running through the center of the osteon. - ✔✔Canaliculi
✔✔Canaliculi are formed because the _____ maintain long tentacle-like projections to
keep in contact with each other. - ✔✔Osteocytes
✔✔Spongy bone contains spaces and supporting struts called _____. - ✔✔Trabecula
✔✔Bone is composed of: - ✔✔Both organic components (cells and osteoid) and
inorganic components (mineral salts)
, ✔✔True or False: If bone is not composed of the proper combination of organic and
inorganic components, it will not function properly; it will be brittle or weak. - ✔✔True
✔✔The development of bones by the replacement of existing cartilage models with
bone tissue is called _____. - ✔✔Endochondral ossification
✔✔During intramembranous ossification, an ossification center forms within _____. -
✔✔Connective tissue membrances
✔✔Endochondral ossification begins with: - ✔✔The formation of a bony collar around a
hyaline cartilage model
✔✔Step 2 of endochondral ossification consists of: - ✔✔The formation of a primary
center of ossification
✔✔The medullary cavity is produced when: - ✔✔Osteoclasts break down the spongy
bone in the diaphysis
✔✔Ossification of the epiphyses occurs: - ✔✔During early adulthood
✔✔The growth in the length of bones occurs as _____ found in the _____ is replaced
by bone. - ✔✔Hyaline cartilage; epiphyseal plate
✔✔The area of growth of bone (area of cartilage ossification) in long bones is found on
which side of the epiphysis? - ✔✔On the diaphysis side of the epiphyseal plates
✔✔The transformation of cartilage to bone happens when: - ✔✔Chondrocytes
hypertrophy, matrix calcifies, and chondrocytes die, leaving behind calcified cells
✔✔True or False: As bones grow in length, they also grow in width. - ✔✔False
✔✔Which hormones play a role in the regulation of bone growth during youth? -
✔✔Growth, sex, and thyroid hormones
✔✔_____ occurs as bone deposit and bone resorption occur at the periosteal and
endosteal surfaces. - ✔✔Bone remodelng
✔✔Bone remodeling is controlled by a _____ feedback mechanism. - ✔✔Negative
✔✔_____ is released when calcium levels in blood decline, which stimulates
osteoclasts to resorb bone and release calcium into the blood. - ✔✔Parathyroid
hormone
QUESTIONS AND ANSWERS SURE A+
✔✔Blood vessels and nerves run through the _____ in the center of the osteon. -
✔✔Haversian (central) canal
✔✔_____ are small cavities at the junction of the lamellae containing _____. -
✔✔Lacunae; osteocytes
✔✔_____ are hair-like canals connecting lacunae to each other and to the canal
running through the center of the osteon. - ✔✔Canaliculi
✔✔Canaliculi are formed because the _____ maintain long tentacle-like projections to
keep in contact with each other. - ✔✔Osteocytes
✔✔Spongy bone contains spaces and supporting struts called _____. - ✔✔Trabecula
✔✔Bone is composed of: - ✔✔Both organic components (cells and osteoid) and
inorganic components (mineral salts)
, ✔✔True or False: If bone is not composed of the proper combination of organic and
inorganic components, it will not function properly; it will be brittle or weak. - ✔✔True
✔✔The development of bones by the replacement of existing cartilage models with
bone tissue is called _____. - ✔✔Endochondral ossification
✔✔During intramembranous ossification, an ossification center forms within _____. -
✔✔Connective tissue membrances
✔✔Endochondral ossification begins with: - ✔✔The formation of a bony collar around a
hyaline cartilage model
✔✔Step 2 of endochondral ossification consists of: - ✔✔The formation of a primary
center of ossification
✔✔The medullary cavity is produced when: - ✔✔Osteoclasts break down the spongy
bone in the diaphysis
✔✔Ossification of the epiphyses occurs: - ✔✔During early adulthood
✔✔The growth in the length of bones occurs as _____ found in the _____ is replaced
by bone. - ✔✔Hyaline cartilage; epiphyseal plate
✔✔The area of growth of bone (area of cartilage ossification) in long bones is found on
which side of the epiphysis? - ✔✔On the diaphysis side of the epiphyseal plates
✔✔The transformation of cartilage to bone happens when: - ✔✔Chondrocytes
hypertrophy, matrix calcifies, and chondrocytes die, leaving behind calcified cells
✔✔True or False: As bones grow in length, they also grow in width. - ✔✔False
✔✔Which hormones play a role in the regulation of bone growth during youth? -
✔✔Growth, sex, and thyroid hormones
✔✔_____ occurs as bone deposit and bone resorption occur at the periosteal and
endosteal surfaces. - ✔✔Bone remodelng
✔✔Bone remodeling is controlled by a _____ feedback mechanism. - ✔✔Negative
✔✔_____ is released when calcium levels in blood decline, which stimulates
osteoclasts to resorb bone and release calcium into the blood. - ✔✔Parathyroid
hormone
