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The body's diffuse collection of phagocytic cells is sometimes called the
__________ are the phagocytic cells that are permanent residents of specific tissues and organs.
The ability of certain cells to respond to changes in their chemical environment is called
The complement factor __________ can sustain and enhance the alternative pathway of complement fixation.
The proportions of an antigen that are recognized by an antibody are the ________.
antigenic determinant sites
The ________ regulates smoothing of transitions from inspiration to expiration.
Pontine respiratory group
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