Acute health effects are an effect that develops immediately or within minutes, hours or even days after an exposure.

Chronic health effects are an adverse health effect resulting from long-term exposure to a substance. Symptoms do not usually subside when the exposure stops. Examples of chronic health effects include asthma and cancer.

Question

Acute health effects are an effect that develops immediately or within minutes, hours or even days after an exposure.

Chronic health effects are an adverse health effect resulting from long-term exposure to a substance. Symptoms do not usually subside when the exposure stops. Examples of chronic health effects include asthma and cancer.

BlackTom AI · Accepted Answer

Consider what the statements describe about acute and chronic health effects. 
Option True: The first sentence defines acute health effects as those that develop immediately or within minutes, hours, or days after exposure, which aligns with standard toxicology definitions. The second sentence defines chronic health effects as adverse outcomes from long-term exposure, with symptoms not usually subsiding when exposure stops, and even provides examples like asthma and cancer. Together, these definitions accurately distinguish acute from chronic effects, making this option consistent with established understanding. 
Option False: If we suppose the statement were incorrect, we would expect a mismatch such as acute effects not having a rapid onset, or chronic effects subsiding after exposure ends, or the examples not fitting chronic outcomes. However, the described onset windows for acute effects (immediate to days) and the persistence of chronic effects after exposure, as well as the example set (asthma, cancer), are all consistent with conventional definitions, so this option does not hold. 
Additional nuance: It’s important to note that some chronic effects can have latency periods or may worsen after exposure stops, but the core definition given—long-term exposure leading to adverse health effects that don’t typically subside promptly—remains accurate. Likewise, acute effects are characterized by rapid onset following exposure, matching the description provided. 
In summary, the provided statements cohesively define acute versus chronic health effects and illustrate them with relevant examples, whereas any alternative interpretation would require redefining well-established terms, which is not supported by the text.

EHS576 Quiz for WHMIS non-lab training

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