instrument for visual examination of the tympanic membrane (ear drum)
A. otoscope
B. laryngoscope
C. myringoscope
D. otitis media
Select your answer:
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Immunity › ViewWhen activated by the presence of a pathogen some lymphocytes produce antibodies and other lymphocytes act as memory cells.
Which of the following best describes the role of memory cells in the immune system?
A. They store antigens from the pathogen for lymphocytes to use as a template for antibodies in the future.
B. They remember the antigen on the pathogen and tell the lymphocytes how to respond if it is re-encountered.
C. They quickly clone to form a group of phagocytes if the pathogen is re-encountered.
D. They quickly clone to form a group of plasma cells if the pathogen is re-encountered.
Homeostasis, Nutrition, Digestion & Absorption › View
Salt water crocodiles bask in the sun for several hours every morning. which one of the following statements best describes the method of thermoregulation in salt water crocodiles?
A. Endothermy, increase body temperature to increase rate of metabolism reactions in cells
B. Ectothermy, decrease body temperature to increase rate of metabolic reactions in cells.
C. Endothermy, decrease body temperature to increase rate of metabolic reactions in cells
D. Ectothermy, increase body temperature to increase rate of metabolic reactions in cells