The job of this organ is to cleanse the blood of pathogens and worn-out or damaged RBCs. 

A. tonsils
B. nodes
C. liver
D. alveolus


C. liver

Biology & Microbiology

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E. corrodens can be easily recognized in culture by its:

a. pink pigmentation. b. grapelike odor. c. large spreading colonial morphologic characteristic. d. bleachlike odor.

Biology & Microbiology

During a specific defense, the process of increasing the numbers of the selected cells is called:a

mitotic expansion. b. clonal selection. c. divisional activation. d. lymphocytic activation. e. memory establishment.

Biology & Microbiology

Protective features of the skin include all of the following except ________.

A. a keratinized surface B. high pH C. high salt content D. resident biota E. lysozyme

Biology & Microbiology

The correct folding of proteins is necessary to maintain healthy cells and tissues

Unfolded proteins are responsible for such neurodegenerative disorders as Alzheimer's disease, Huntington's disease, and Creutzfeldt–Jakob disease (the specific faulty protein is different for each disease). What is the ultimate fate of these disease-causing, unfolded proteins? (a) They are degraded. (b) They bind a different target protein. (c) They form structured filaments. (d) They form protein aggregates.

Biology & Microbiology