Question

1. a laboratory technician is exposed to a chemical spill at work. shortly afterward, he becomes ill. a medical toxicologist explains that some substances are so dangerous because, once inside the body, they can disrupt normal biological processes at the cellular level. what is the main reason toxic substances are considered dangerous?

o they can physically remove or tear tissues
o they cause debilitating parasitic diseases
o they react or interfere with specific cell functions
o they are usually synthetic

Explanation:

Toxic substances are dangerous because they disrupt normal biological processes at the cellular level. This interference can lead to a wide range of negative effects on the body. For example, they can react or interfere with specific cell functions. Cells are the basic units of life, and when their functions are disrupted, it can cause various health problems. Physical removal or tearing of tissues (while a possible effect in some cases) is not the main reason for their danger compared to cellular - level disruption. Causing debilitating parasitic diseases is a very specific (and less common in the general sense of toxicity) outcome. Whether they are synthetic or not (the "they are usually synthetic" option) is not relevant to why they are dangerous in terms of their biological impact.

Answer:

They react or interfere with specific cell functions.