Question 1

Acetylcholine is a chemical messenger that

Accepted Answer

A)  activates the presynaptic membrane to make it permeable to ions that conduct an impulse.
B)  inactivates the presynaptic membrane to make it impermeable to certain ions that conduct an impulse.
C)  activates the postsynaptic nerve cell by fitting into a specific receptor and changing the permeability of the cell membrane to certain ions.
D)  inactivates the postsynaptic membrane to make it impermeable to certain ions that conduct an impulse.E) All of the above
F) A) and C)

Question 2

The Ames test assumes that most carcinogens will also be mutagens.

Accepted Answer

A) True 
 B)False  True

Question 3

Nitrate acts as a poison by

Accepted Answer

A)  oxidizing hemoglobin to methemoglobin, which cannot carry oxygen.
B)  reacting with enzymes that break down toxic wastes in the liver.
C)  interfering with oxidative enzymes.
D)  blocking cell protein synthesis.E) A) and D)
F) B) and C)

Question 4

Which of the following types of waste would be least hazardous?

Accepted Answer

A)  corrosive waste
B)  flammable waste
C)  waste material from living plants
D)  reactive wasteE) C) and D)
F) B) and C)

Question 5

Cyanide poisons by

Accepted Answer

A)  blocking oxygen transport by hemoglobin.
B)  reacting with lung tissue.
C)  deactivating glucose oxidation enzymes.
D)  blocking cell protein synthesis.E) B) and C)
F) A) and D)

Question 6

The active ingredient in which of the following is a corrosive poison?

Accepted Answer

A)  ammonia
B)  drain cleaner
C)  furniture wax
D)  laundry detergentE) None of the above
F) All of the above

Question 7

In the body,ethanol goes through the following steps.

Accepted Answer

A)  ethanol → acetic acid → acetaldehyde → carbon dioxide and water
B)  ethanol → carbon dioxide and water → acetaldehyde → acetic acid
C)  ethanol → acetic acid → carbon dioxide and water → acetaldehyde
D)  ethanol → acetaldehyde → acetic acid → carbon dioxide and waterE) A) and B)
F) A) and C)

Question 8

The average fatal dose of hydrogen cyanide is

Accepted Answer

A)  5 to 10 mg.
B)  50 mg.
C)  5 to 10 g.
D)  200 to 300 g.E) A) and B)
F) B) and D) B

Question 9

What is the most effective way to dispose of organic wastes?

Accepted Answer

A)  bury them in landfills
B)  incinerate them
C)  recycle them
D)  store them in special containersE) A) and D)
F) All of the above

Question 10

Which is a poison that acts by blocking the oxidation of glucose within cells?

Accepted Answer

A)  nitrate
B)  cyanide
C)  nicotine
D)  sulfuric acidE) None of the above
F) A) and B)

Question 11

Iron (as Fe²⁺) is

Accepted Answer

A)  toxic at all concentrations.
B)  safe at all concentrations.
C)  toxic at high concentrations, essential at low concentration.
D)  toxic at high concentration, not known to be essential.E) C) and D)
F) None of the above

Question 12

P-450 enzymes,which can convert fat-soluble compounds into water-soluble compounds that can be excreted,are found in the

Accepted Answer

A)  throat.
B)  liver.
C)  pancreas.
D)  blood.E) C) and D)
F) A) and B)

Question 13

Which is a corrosive poison?

Accepted Answer

A)  carbon monoxide
B)  potassium nitrite
C)  methyl alcohol
D)  sulfuric acidE) B) and D)
F) A) and B)

Question 14

The best way to dispose of a flammable waste is

Accepted Answer

A)  process through a wastewater treatment plant.
B)  bury in a landfill.
C)  burn in an incinerator.
D)  store in a sealed barrel.E) B) and C)
F) None of the above

Question 15

The average adult requires 45 to 50 mg of iron every day.

Accepted Answer

A) True 
 B)False

Question 16

Sodium fluoroacetate,also known as Compound 1080,is highly selective and poisonous only to snakes.

Accepted Answer

A) True 
 B)False

Question 17

A teratogen is a cancer-causing substance.

Accepted Answer

A) True 
 B)False

Question 18

The cause of itai-itai,the "ouch-ouch" disease is

Accepted Answer

A)  cadmium.
B)  mercury.
C)  lead.
D)  iridium.E) B) and C)
F) C) and D)

Question 19

The simplest and least expensive method for testing for possible carcinogenic activity is

Accepted Answer

A)  the Ames test.
B)  animal testing.
C)  epidemiological studies.
D)  human testing.E) C) and D)
F) A) and C) A

Question 20

Which of the following is the most poisonous?

Accepted Answer

A)  botulin
B)  strychnine
C)  nicotine
D)  coniineE) A) and B)
F) None of the above

Exam 22: Poisons

Acetylcholine is a chemical messenger that

Correct AnswerverifiedShow Answer

The Ames test assumes that most carcinogens will also be mutagens.

Correct AnswerverifiedTrue

Nitrate acts as a poison by

Correct AnswerverifiedShow Answer

Which of the following types of waste would be least hazardous?

Correct AnswerverifiedShow Answer

Cyanide poisons by

Correct AnswerverifiedShow Answer

The active ingredient in which of the following is a corrosive poison?

Correct AnswerverifiedShow Answer

In the body,ethanol goes through the following steps.

Correct AnswerverifiedShow Answer

The average fatal dose of hydrogen cyanide is

Correct AnswerverifiedB

What is the most effective way to dispose of organic wastes?

Correct AnswerverifiedShow Answer

Which is a poison that acts by blocking the oxidation of glucose within cells?

Correct AnswerverifiedShow Answer

Iron (as Fe²⁺) is

Correct AnswerverifiedShow Answer

P-450 enzymes,which can convert fat-soluble compounds into water-soluble compounds that can be excreted,are found in the

Correct AnswerverifiedShow Answer

Which is a corrosive poison?

Correct AnswerverifiedShow Answer

The best way to dispose of a flammable waste is

Correct AnswerverifiedShow Answer

The average adult requires 45 to 50 mg of iron every day.

Correct AnswerverifiedShow Answer

Sodium fluoroacetate,also known as Compound 1080,is highly selective and poisonous only to snakes.

Correct AnswerverifiedShow Answer

A teratogen is a cancer-causing substance.

Correct AnswerverifiedShow Answer

The cause of itai-itai,the "ouch-ouch" disease is

Correct AnswerverifiedShow Answer

The simplest and least expensive method for testing for possible carcinogenic activity is

Correct AnswerverifiedA

Which of the following is the most poisonous?

Correct AnswerverifiedShow Answer

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True

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B

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A

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