Which of the Following Water-Borne Pathogens Are Protozoans

question 9

Multiple Choice

Which of the following water-borne pathogens are protozoans?

• A)Vibrio
• B)Hepatitis A
• C)Giardia
• D)Shigella
• E)Norwalk virus

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Definitions:

Sensory Adaptation

The process by which sensory receptors become less sensitive to constant or unchanging stimuli over time, allowing individuals to focus on changes in their environment.

Absolute Threshold

The lowest level of stimulation that an organism can detect at least 50% of the time.

Attention

The process of sorting through sensations and selecting some of them for further processing.

Difference Threshold

The smallest difference in stimulus intensity required to detect a difference between two stimuli, also known as the just noticeable difference (JND).