An autoimmune disease is characterized by
A) the absence of an inflammatory response.
B) an insufficient or completely inactivated immune system.
C) increased lysozyme enzyme concentration in saliva, tears, and mucous secretions.
D) "anti-self" antibodies that can destroy some "self" cells.
D
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What process(es) are required for phospholipids to flip-flop across the lipid bilayer?
A. The process requires energy. B. The process occurs spontaneously, requiring no energy. C. The process requires an enzyme called flippase. D. The process requires energy and the flippase enzyme. E. The process occurs spontaneously and requires the flippase enzyme.
LDL particles binding to receptors before being engulfed by a cell is an example of which of the following?
a. phagocytosis b. pinocytosis c. receptor-mediated endocytosis d. exocytosis
In a relaxed muscle, the protein ____________________ is blocking binding sites between the contractile proteins. Fill in the blank(s) with the appropriate word(s)
Which of the following is/are a free-living amoeba that can cause encephalitis?
A) Acanthamoeba
B) Naegleria
C) Entamoeba
D) Naegleria and Acanthamoeba
E) Entamoeba and Naegleria