A patient has a suspicious skin infection and a culture is taken. Which media would be appropriate to select for Staphylococci?
A. nutrient agar
B. blood agar
C. chocolate agar
D. MacConkey agar
E. mannitol salt agar
Answer: E. mannitol salt agar
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Streptococcus thermophilus and Lactobacillus bulgaricus contribute to the flavor of yogurt by producing diacetyl during the fermentation of lactose.
Answer the following statement true (T) or false (F)
________ and ________ suggest that specific personality variables serve as vulnerability factors for depression. Sociotropy and autonomy are related to depression.
Fill in the blank(s) with the appropriate word(s).
About 180 liters of blood plasma is filtered into human nephrons per day and, of that amount, about 2-3 liters leaves the body as urine. Therefore, the percentage of plasma filtrate that leaves as urine each day is about ________.
A. 10-20 percent B. 0.5-1.0 percent C. 1-2 percent D. 20-50 percent E. 0.1-0.2 percent F. 5-10 percent
How is the development of autoimmunity normally prevented?
A) T lymphocytes that respond to autoantigens in the thymus undergo clonal deletion. B) T lymphocytes require a specific set of cytokine signals to become activated. C) Regulatory T cells suppress autoimmune responses. D) Clonal deletion of T cells and regulatory T cell suppression prevent autoreactive T cell activation. E) Clonal deletion of T cells, lack of necessary cytokine signals, and regulatory T cell suppression prevent activation of autoreactive T cells.