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35 Cards in this Set
- Front
- Back
A. Loose Connective Tissue, AreolarB. Gel like matrix with all three fiber typesC. Wraps and cushions organsD. Under Epithelia of bodyE. Dots- Fibroblast nuclei, thin dark fibers- elastic fibers, thicker lighter fiberst are elastic fibers
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A: What kind of tissue is this?B. Description?C. Function?D. Location?E. What are the dots and the different types of fibers?
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A. Loose connective tissue, adiposeB. Closely packed adipocytes with nucleus pushed to the sideC. Provides reserve fuelD. Under skin, around kidneys and eye balls; within abdomon and beasts
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A. What kind of tissue is this?B. Description?C. Function?D. Location?
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A. Loose connective tissue, reticularB. Network of reticular fibersC. Supports white blood cells, mast cells and macrophagesD. Lymphoid organs
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A. What kind of tissue is this?B. Description?C. Function?D. Location?
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Bone can be classified by shape into what categories?
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Flat or Long
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Bone can be classified by mechanism of formation into what categories?
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Intramembranous - cartilage is NOT used as a template. Mesenchymal cells differentiate into bone cells and immediately start laying down bone. Endochondral - bone formation with cartilage model
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Which of the following are categories of microscopic structure that bone can be classified into?A. CancellousB. CompactC. LamellarD. SpongyE. TrabecularF. Woven
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Microscopic structure is by age: C. Lamellar (aka mature) and F. Woven (aka immature)All the rest are examples of macroscopic structure (type) classification. Spongy = cancellous = trabecular. Compact is the other type.
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Which of the following are categories of macroscopic structure that bone can be classified into?A. CancellousB. CompactC. LamellarD. SpongyE. TrabecularF. Woven
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Spongy = cancellous = trabecular. Compact is the other type. The others are examples of microscopic structure (by age).
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Bone is vascular. How do nutrients get through it?
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Neurovascular channels extend thru compact bone and between periosteum and inside the bone.
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True or False:Bone exhibits ONLY appositional growth.
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TRUE!! Only layer over previous layer. No interstitial growth!
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Regarding regional divisions in the architecture of a long bone, match each description with its term.1. compact bone with red or yellow marrow2. compact outside, spongy inside3. demarcation of growth Diaphysis, Epiphyseal plate or line, Epiphysis
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1. Diaphysis2. Epiphysis3. Epiphyseal plate or line
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The [ endosteum / periosteum ] is the outer layer of dense irregular CT whose inner layer is an osteogenic layer with osteoblasts.
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Periosteum.
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The [ endosteum / periosteum ] is the lining inside of bone (marrow cavity; all internal surfaces of bone that is only comprised of osteogenic layer with osteoblasts.
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Endosteum.
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Regarding architecture of a flat skull bones, the periosteum outersurface is called the ________ while the inner surfaces is continuous with the _______.
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pericranium, dura mater
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_______ secrete chondroitun sulfate and collagen type I fibers, which all together are called osteoid. A. OsteoblastsB. OsteocytesC. Osteoclasts
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A. Osteoblasts
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What is osteoid?
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It is chondroitin sulfate + collagen type I fibers. Secreted by osteoblasts.
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What do osteoblasts secrete?
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Chondroitin sulfate and Collagen Type I fibers
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When does an obsteoblast become an osteocyte?
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Osteoblast becomes an osteocyte when they are surrounded by their matrix.
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What is the mechanism of bone deposition? (2 or 3 steps, depending on your perspective)
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1. Osteoblast will synthesize osteoid (Type I collagen, chondroitin sulfate)2. Ossification of osteoid. Oteoblast has alkaline phosphatase secreted into osteoid. Calcium is deposited on the collagen fibers in form of hydoxyapatite crystals.
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In mechanism of bone deposition, particularly the ossification of osteoid, __________ is secreted into osteoid and then ______ is deposited on the ________ to form _______ crystals.
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ALKALINE PHOSPHATASE is secreted into osteoid, CALCIUM is depositied on the COLLAGEN FIBERS in the form of HYDOXYAPATITE crystals
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[ Osteoblasts / Osteoclasts / Osteocytes ] are located within lacunae and have cell processes that extend thru canaliculli.
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OsteocytesThese also have gap junctions that join cells (how they get nutrition)
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[ Osteoblasts / Osteoclasts / Osteocytes ] gobble up bone constantly, are multinucleated, and commonly seen within Howship's lacunae or resorption canals.
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Osteoclasts
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[ Osteoblasts / Osteoclasts / Osteocytes ] are seen within Howship's lacunae or resorption canals.
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Osteoclasts
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Regarding the intercellular matrix of bones, the organic portion composed of ________ and ______ accounts for about ____% of bone weight whereas the inorganic portion, composed of crystal-resembling __________ makes up about ____% of bone weight.
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Organic portion (35%) : Collagen Type I fibers and chondroitin sulfates. Note: of the organic components, 90% of it is collagen type I fibers.Inorganic portion (65%) : crystal resembling hydroxyapatite
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Regarding intercellular matrix of bone, the [ inorganic / organic ] portion provides bone with toughness and resiliency.
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organic portion (makes up 35% of bone weight) relays toughness and resiliency
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Regarding intercellular matrix of bone, the [ inorganic / organic ] portion provides bone with it's hardness.
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inorganic portion = bone hardness and 65% of bone weight
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Compact bone has three types of lamella: Haversian / Osteon system, Outer and Inner circumferential lamellae, and Interstitial lamellae. Describe em.
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see side three or "H" for written
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What is Sharpey's fibers?A. bundles of collagen where tendon inserts into boneB. fibers lining Volkmann's canalsC. fibers lining cement lines
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A. bundles of collagen where tendon inserts into bone
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True or False:Spongy / Cancellous bones do not contain haversian systems.
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True. They are nourished by blood vessels in the bone marrow cavity.
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This refers to macroscopic structure of bone. A. Compact vs. SpongyB. Woven vs. LamellarC. Intramembranous vs. Endochondral
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A. Compact vs. Spongy
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This refers to microscopic structure of bone. A. Compact vs. SpongyB. Woven vs. LamellarC. Intramembranous vs. Endochondral
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B. Woven vs. Lamellar
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This refers to the two mechanisms of bone formation. A. Compact vs. SpongyB. Woven vs. LamellarC. Intramembranous vs. Endochondral
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C. Intramembranous vs. Endochondral
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This refers to macroscopic structure of bone. A. Compact vs. SpongyB. Woven vs. LamellarC. Intramembranous vs. Endochondral
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A. Compact vs. Spongy
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This refers to microscopic structure of bone. A. Compact vs. SpongyB. Woven vs. LamellarC. Intramembranous vs. Endochondral
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B. Woven vs. Lamellar
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This refers to the two mechanisms of bone formation. A. Compact vs. SpongyB. Woven vs. LamellarC. Intramembranous vs. Endochondral
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C. Intramembranous vs. Endochondral
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True or False: Osteoclasts belong to the monocyte lineage and are not related to osteoblasts or osteocytes.
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True. Digital Histo: Tissues > Connective > Bone and Bone Marrow > As a Tissue 4 of 15
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