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Valorie

Physiology study stack

TermDefinition
Types of bone cells osteoblasts- bone forming cells osteoclasts- giant multinucleate cels, responsible for the active erosion of cells osteocytes- mature, nondividing osteoblasts that have become surrounded by matrix and lie within lacunae
Structure of long bones diaphysis epiphyses articular cartilage periosteum medullary cavity endosteum
diaphysis main shaft like portion, cylindrical shape and the thick compact bone that composes it adapt the diaphysis well to its function of providing strong support without adding weight.
epiphyses bulbous shape that provides space near joints for muscle attachments and gives stability to joints. Red marrow fills the spaces within this sponge bone in early development.
epiphyseal plate and epiphyseal line eppiphyses are separated from diaphysis by cartilage formed by the cartilage layer replaced by bone
Articular cartilage thin layer of hyaline cartilage that covers the articular or joints surface of epiphyses and diaphysis or the epiphyseal plate.
two principal chemical components of bone matrix inorganic salts about 2/3 of the matrix and organic about 1/3 of the matrix.
Feedback control loops Information may transmitted in these control loops by nervous impulses or by specific chemical messengers called hormones
Feedback control loops basic components sensor integrated effector feedback
The most important and numerous of homeostasis control mechanism are Negative feedback system-are inhibitory-oppose or negate a change by creating a response that is opposite in direction to the initial disturbance-to bring back to normal
Levels of homeostatic control intracellular control intrinsic control extrinsic control
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