True or False: Endotoxins are the secreted products of living cells, whereas exotoxins are cell bound and released in large amounts ONLY when the cells lyse
a. TRUE
b. FALSE
Answer: B
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The thymus plays an important role in ____
a. secretion of thyroxine b. immune function c. adrenal function d. production of testosterone e. sleep-wake cycles
Which statement about decomposers is FALSE?
a. They act with detritivores to break down and recycle organic matter. b. They are microbial heterotrophs. c. They include bacteria but not fungi. d. They use the products of decomposition to supply themselves with energy. e. They are also called saprotrophs
Semmelweis advocated handwashing as a method of preventing which of the following diseases?
A) cholera B) puerperal fever C) smallpox D) anthrax E) syphilis
Please choose the statement that best describes the pathology of most autoimmune diseases.
A) Autoimmune diseases result from autoantibodies that either bring about cytotoxic responses or form immune complexes that provoke inflammation. B) Autoimmune diseases are equally distributed among males and females and various age groups. C) Autoimmune diseases are the result of the destruction of T cells, which impairs cell-mediated responses. D) Autoimmune diseases are caused by overproduction of IgE and the degranulation of mast cells and basophils in response to autoantigens.