What factors contribute to the effect an environmental toxin has on the human body?

There are several factors that can contribute to the effect an environmental toxin has on the human body. They are:

- Form and innate chemical activity

- Dosage, especially dose-time relationship

- Exposure route

- Species

- Life stage, such as infant, young adult, or elderly adult

- Gender

- Ability to be absorbed

- Metabolism

- Distribution within the body

- Excretion

- Health of the individual, including organ function and pregnancy, which involves physiological changes that could influence toxicity

- Nutritional status

- Presence of other chemicals

- Circadian rhythms (the time of day a drug or other substance is administered)

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up