National League for Nursing (NLN PAX) Practice Exam

Question: 1 / 495

When dilute nitric acid is added to water surrounding a hydra, what is its role?

Food source

Stimulant

When dilute nitric acid is added to water surrounding a hydra, it acts as a stimulant. Nitric acid can influence the hydra's contractile behavior and response to its environment due to its chemical properties. In biological systems, certain acids can stimulate physiological responses, enhancing the movement or behavior of organisms.

While hydra do require nutrients and minerals from their environment, the function of the nitric acid specifically relates to motivating or stimulating various aspects of their physiology or movement rather than serving as a food source, blocker, or mineral source. Understanding the interactions between organisms and their environment is crucial, especially in how specific chemical agents can provoke changes in behavior or development.

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Blocker

Mineral source

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