Which of the following cells dissolve bone matrix to tear bone down so that it can be replaced with new, stronger bone?
A) marrow
B) osteoblasts
C) osteocytes
D) osteoclasts
D
Explanation:
A) Bone marrow is found in the medullary cavity of long bones.
B) Osteoblasts accomplish bone growth and repair.
C) Osteocytes are mature bone cells that maintain the mineral and protein components of bone matrix.
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A) the resting membrane potential B) repolarization C) depolarization D) the battery
Micro-organisms that live within or on us normally are collectively called ________
A) Normal flora B) Cancer cells C) White blood cells D) Epithelial cells
The middle ear ossicle is the ________.
Fill in the blank(s) with the appropriate word(s).
Hair cells in the spiral organ of the ear are never replaced
Indicate whether the statement is true or false