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9 Cards in this Set

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  • Back
Bone cells that liquefy bone matrix and release calcium to the blood are called _______.
Osteoclasts
Disuse such as that caused by paralysis or severe lack of exercise results in muscle and bone _________.
Atrophy
Our astronauts must do isometric exercises when in space because bones atrophy under conditions of weightlessness or lack of ________.
Gravity
Mature bone cells, called _______, maintain bone in a viable state
Osteocytes
large tubercles and/or increased deposit of bony matrix occur at sites of ___________.
stress and/or tension
when blood calcium levels begin to drop below homeostatic levels, _________ is released, causing calcium to be released from bones.
Parathyroid hormone
Immature, or matrix-depositing, bone cells are referred to as ___________.
Osteoblasts
Maure bone cells, called _______, maintain bone in a viable state
Osteocytes
___________ causes blood calcium to be deposited in bones as calcium salts.
Calcitonin