Which cells have a ruffled border and secrete hydrochloric acid?
Osteoclasts
The medullary cavity of a child's bone may contain ________.
Red bone marrow
The long bones of the limbs grow in length by cell proliferation and hypertrophy in _________.
The metaphysis
Osteoclasts are most closely related by common descent to ________.
Monocytes
The walls between cartilage lacunae break down in the zone of ________.
Bone deposition
What produces bone deposition?
Dietary calcium, vitamin d, calcitonin, and testosterone
A child jumps to the ground from the top of a playground "jungle gym". His leg bones do not shatter mainly because they contain ___________.
Collagen fibers
One long bone meets another at its ________.
Epiphysis
Calcitriol is made from ________.
7-dehydrocholesterol
One sign of osteoporosis is _________.
Kyphosis
Calcium phophate crystalizes in bone as a mineral called __________.
Hydroxyapatite
Osteocytes contact each other through channels called _______ in the bone matrix.
Canaliculi
A bone increases in diameter only by ________ growth, the addition of new surface lamellae.
Appositional
Most compact bone is organized in cylindrical units called ________, composed of lamellae encircling a central canal.
Osteons
The _______ glands secrete a hormone that stimulates cells to resorb bone and return its minerals to the blood.
Parathyroid
The ends of a bone are covered with a layer of hyaline cartilage called the ________.
Articular Cartilage
The cells that deposit new bone matrix are called _______.
Osteoblasts
The most common bone disease is _________.
Osteoporosis
The transitional region between epiphyseal cartilage and the primary marrow cavity of a young bone is called the _________.
Metaphysis
The cranial bones develop from a flat sheet of condensed mesenchyme in a process called _______.
Intramembranous ossification
Spongy bone is normally covered by __________ bone.
Compact
Most bones develop form ___________ cartilage.
Hyaline
What is the most common bone disorder?
Osteoporosis
What is the growth zone of the long bones of adolescents?
Epiphyseal plate
What develops osteoclasts?
Stem cells (related to monocytes)
What develops osteocytes?
Osteoblasts
What is the protein of bone matrix?
Collagen
Blood vessels travel through the _________ _________ of compact bone.
Central canal
What bone marrow has a hemopoietic function?
Red bone marrow
What hormone promotes bone resorption and raises blood calcium concentration?
Parathyroid