Toxicology

These answers are found in Chapters 9 and 10\

Toxicology

 

Question 1

1.

Which air pollutant binds actively to hemoglobin, reducing the ability of blood to supply oxygen to the tissues?

Answer

    hydrogen sulfide
    nitrogen dioxide
    carbon monoxide
    carbon dioxide

4 points   

Question 2

1.

Ozone arises from a cyclic reaction between oxygen and _______.

Answer

    sulphur dioxide
    carbon dioxide
    hydrogen sulphide
    nitrogen dioxide

4 points   

Question 3

1.

Fertilizers, sewage and organic waste products in waste water may lead to abundant growth of _______.

Answer

    aquatic plants
    succulents
    tropical plants
    desert plants

4 points   

Question 4

1.

Methylmercury has a long half-life in the body, approximately ______days.

Answer

    150
    200
    70
    20

4 points   

Question 5

1.

Poisoning may occur through the intentional eating of fungi believed to contain ____.

Answer

    psychoactive substances
    combustible substances
    pennyroyal oil
    castor oil

4 points   

Question 6

1.

Throat cancer in the Japanese may be due to the ingestion of ________.

Answer

    pennyroyal
    mushrooms
    bracken
    puffer fish

4 points   

Question 7

1.

Which element causes a peripheral vascular disorder known as black-foot disease?

Answer

    iron
    sulfur
    zinc
    arsenic

4 points   

Question 8

1.

Which toxic substance found in snake venom sometimes causes intravascular hemolysis by direct action on the red blood cell membrane?

Answer

    saxitoxin
    inorganic sulfur
    sulfur oxides
    phospholipases

4 points   

Question 9

1.

What is that animal toxin that is found in the puffer fish?

Answer

    cantharidin
    formic acid
    amino acid
    tetrodotoxin

4 points   

Question 10

1.

Magnesium lost from soil due to acidification is believed to be an important factor in the __________.

Answer

    die back of trees
    powdery mildew of trees
    root-rot of trees
    leaf injury of trees

4 points   

Question 11

1.

Assume the responsibility of the director of Environmental Protection Agency (EPA). List the most important actions for dealing with the problems of (a) air pollution and (b) water pollution. What other actions might you recommend to take other than the ones listed in the textbook? Justify your position.

Answer

 
 

 

20 points   

Question 12

1.

Discuss the role of ALAD in lead toxicology.

Answer

 

20 points   

Question 13

1.

What symptoms exist between the effects of exposure to mercury and arsenic? How could you distinguish the difference?

 

 

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