Explain the Relationship Between the Prevalence of Schistosomiasis and the Use

question 57

Multiple Choice

Explain the relationship between the prevalence of schistosomiasis and the use of molluscicide in tropical regions like Nigeria.

• A) The molluscicide kills snails that prey on the parasite; its use has caused an increase in the prevalence of the disease.
• B) The molluscicide kills snails that are food for fish that also feed on the mosquito that spreads the disease; its use has caused an increase in the prevalence of the disease as fish populations have declined.
• C) The molluscicide kills snails that are food for fish that now feed extensively on the mosquito that spreads the disease; its use has caused a decrease in the prevalence of the disease.
• D) The molluscicide kills snails that are a vector for the parasite; its use has caused a decrease in the prevalence of the disease.

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Definitions:

Visual Processing

The interpretation of visual stimuli by the brain to understand and interact with the environment, involving several stages including perception, recognition, and interpretation.

Frequency

The rate at which something occurs or is repeated over a particular period of time or in a given sample.

Cycles Per Second

A measure of frequency, equivalent to the number of occurrences of a repeating event per second; also known as Hertz (Hz).

Opponent-Process Theory

Opponent-Process Theory is a psychological and neurological model explaining how the perception of colors is controlled by two opposing systems in the brain, creating a balance between excitatory and inhibitory processes.