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Anat1 - Bones

(Week 2)

The five functions of bone are: support, protection, movement, mineral storage, blood cell formation
Long bones consist of a _______ and an _______. diaphysis, epiphysis
The _______ is a tubular shaft that forms the axis of long bones. diaphysis
The _______ are the expanded ends of long bones. epiphyses
_______ _______ _______ is contained in the medullary cavity of the diaphysis. Yellow bone marrow
The diaphysis of long bone is composed of _______ bone that surrounds the medullary cavity. compact
The exterior of the epiphysis of a long bone is _______ bone, and the interior is _______ bone. compact, spongy
The joint surface of the epiphysis of a long bone is covered with _______ cartilage. articular (hyaline)
The _______ _______ separates the diaphysis from the epiphyses. epiphyseal plate or line (aka metaphysis)
The _______ _______ is a disk of hyaline cartilage where growth occurs during childhood. It fuses when growth stops. epiphyseal plate or line (aka metaphysis)
Short, Irregular, and Flat Bones have no _______ or _______. diaphysis, epiphyses
Short, Irregular, and Flat Bones contain _______ _______ between the trabeculae. bone marrow
Short, Irregular, and Flat Bones consist of thin plates of periosteum-covered _______ bone on the outside with endosteum-covered ______ bone on the inside. compact, spongy
The spongy bone in flat bones is also called: diploƫ
In infants, red bone marrow is found in the _______ _______ and all areas of _______ bone. medullary cavity, spongy
In adults, red bone marrow is found in the _______ of flat bones, and in the head of the _______ and _______. diploƫ, femur, humerus
The _______ is a double-layered protective membrane surrounding bone. periosteum
The outer fibrous layer of the _______ is dense regular connective tissue. periosteum
The inner osteogenic layer of the periosteum is composed of _______ and _______. osteoblasts, osteoclasts
The periosteum is secured to underlying bone by _______ _______. Sharpey's fibers
The _______ is a delicate membrane covering the internal surfaces of bone. endosteum
Osteoblasts _______ bone. build
Osteoclasts _______ bone. resorb/ break down
_______ are star-shaped cells found in bone. They are mature bone cells. osteocytes
_______ become osteocytes. Osteoblasts
The structural unit of compact bone is the: Osteon or Haversian System
The central channel containing blood vessels and nerves is the: Haversian canal or Central canal
The weight bearing columns of concentric rings/matrix tubes composed mainly of collagen are: lamella
The channels lying at right angles to the central canal, connecting blood and nerve supply of the periosteum to that of the central canal are: volkmann's canals
The small cavities in bone that contains osteocytes are: lacunae
The hairlike canals that connect lacunae to each other and the central canal are: Canaliculus (sing: canaliculi)
The _______ is the unmineralized bone matrix composed of proteoglycans, glycoproteins, and collagen. osteoid
True or False: Bone is a dynamic and active tissue, it undergoes continual change, its architecture changes in response to forces placed upon it. True
Rising blood Ca2+ levels trigger the thyroid to release _______, which stimulates calcium salt deposits in bone. calcitonin
Falling blood Ca2+ levels signal the parathyroid glands to release _______, which signals osteoclasts to degrade bone matrix and release Ca2+ into the blood. PTH (parathyroid hormone)
_______ _______ states that a bone grows or remodels in response to the forces or demands placed upon it. Wolff's law
_______ is the most abundant mineral in the body. Calcium
_______ _______ exercise builds denser, stronger bones. weight-bearing
Created by: sdouglass



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