NCSU BIO 240 KLESATH MODULE1.1 QUESTIONS WITH
100% ACTUAL CORRECT ANSWERS GRADED A+|
ALREADY PASSED| COMPLETE SOLUTION
Bones - ANSWER-- Primary organs of the skeletal system
- Provide framework of body and attachment sites for muscles
Cartilage - ANSWER-Component of embryonic, growing, and mature bones and
joints
Connective Tissue - ANSWER-- Bone and cartilage outer membrane
-Ligaments connect bones,, tendons connect muscles to bones
Skeletal System Functions - ANSWER-- Mobility and movement
- Support and protection
- Hemopoiesis
- Storage (Mineral and Lipid)
Bone Structure Classification - ANSWER-Long, Short, Flat, and Irregular
Organic - ANSWER-- Consists largely of collagen, proteoglycans, and glycoproteins
arranged in a uniformed pattern.
- !/3 of Matrix
Inorganic - ANSWER-- Consists of Hydroxyapatite Crystals
- Results in the mineralization/calcification of the bone matrix
Osteoprogenitor cells - ANSWER-bone stem cells
Osteoblasts - ANSWER-Synthesize and secrete osteoid
Osteocytes - ANSWER-Mature cells enveloped by calcified osteoid and maintains
the matrix
Osteoclasts - ANSWER-multinucleate cell that secretes acids and enzymes to
dissolve bone matrix
Compact Bone - ANSWER-- Located at bone exterior
-Appears white, smooth, and solid
- Composed of Osteons and lamellae
, Spongy Bone - ANSWER-- Located internal to compact bone
- Appears porous with space between bone tissue
-Composed of trabeculae
External Circumferential Lamellae - ANSWER-Rings of compact bone that surround
the entire outer compact bone surface; found immediately internal to bone
periosteum
Interstitial Lamellae - ANSWER-Compact bone remains of a partially reabsorbed
osteon found between newer, complete osteons.
Osteon - ANSWER-Functional unit of compact bone composed of concentric
lamellae and central canal
Internal Circumferential Lamellae - ANSWER-Rings of compact bone that line the
inner edge of compact bone tissue; found adjacent to the endosteum
Periosteum - ANSWER-- Double layer bone covering adjacent to compact bone
- Connected to compact bone by perforating fibers
- Outer fibrous layer composed of connective tissue
- Inner cellular layer contains osteoprogenitor cells, osteoblasts, and osteoclasts
Nutrient Foramen - ANSWER-Opening in the bone where vessels and nerves enter
and exit
Perforating Canal - ANSWER-Carries blood vessels and nerves through compact
bone, interconnecting the central canals of osteons
Proximal Epiphysis - ANSWER-Closest to the truck of body
Distal Epiphysis - ANSWER-Furthest from the truck of the body
Epiphyses - ANSWER-Enlarged surface ends or "knobs" composed of thin outer
compact bone
Articular Cartilage - ANSWER-- Protective cartilage layer found on some bone ends
such as where joints occur
- Reduces friction and absorbs shock in moveable joints
Metaphysis - ANSWER-Region that widens and transfers the weight between the
diaphysis and the epiphysis
Epiphyseal Plate - ANSWER-contains cartilage, growth still occurring
Epiphyseal Line - ANSWER-No cartilage present, growth has ceased
Periosteum - ANSWER-- A double layer sheath that covers the outer surface of most
bones
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