Endocrine disruptors have been linked to 1) dead zones in the Gulf of Mexico 2)

Question

Endocrine disruptors have been linked to

1)            dead zones in the Gulf of Mexico

2)            an increase in extinction rates of tigers.

3)            the worldwide drop in sperm counts among men

4)            increased radon exposure

Which group of humans is most susceptible to the effect of toxicants and yet one of the least used in determining regulations?

1)            senior citizens

2)            fetuses and young children

3)            adults

4)            Inuit populations

Synergistic effects of toxicants ________.

1)            make the source easier to determine

2)            always involve synthetic toxicants

3)            typically have simple additive effects

4)            often have effects that are multiplicative

Aquatic animals such as fish and frogs are especially good indicators of pollution because ________.

1)            they are easy to catch

2)            all chemical toxicants are found in water

3)            the metabolism of these organisms is most like ours

4)            these organisms are the most abundant on earth

5)            most chemicals are water soluble and these organisms live in water

In general, water use worldwide is dominated by

1)            industrial activities.

2)            agricultural use.

3)            domestic needs.

4)            use as drinking water.

Explanation / Answer

1)Endocrine disruptors are chemicals that can interfere with endocrine systems and causes birth defects and developmental disorders. This is responsible for increased extinction rates of tigers.

2)Children are actually more susceptible to toxicants from their effects as childen are small in size which means they get a higher concentration of toxicant for their body weight than adults.

3)Synergistic effects of toxicants often have effects that are multiplicative as they have greater than the sum of the effects of the components.

4)Aquatic animals such as fish and frogs are especially good indicators of pollution because most chemicals are water soluble so they enter these organisms and mainly because they live in water.

Please ask further questions in next post according to chegg policy.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.