Toxicity Levels

Which of the following is the most lethal?

• Sucrose
• Nicotine
• Caffeine
• Ricin

LD50 is defined as 

• The amount of toxin that causes the first symptom in people
• The amount of toxin that kills 50% of the population in 4 hrs
• The amount of toxin that kills 100% of the population in 4 hrs
• The amount of toxin that kills 50% of the population in 2 hrs

The amount of a toxin that causes the first symptoms to appear is

• Threshold Dose
• LD50
• Lethal Dose
• Route of Entry

150 lbs is equal to 

• 330 kg
• 150 kg
• 68 kg
• 59 kg

Which toxin is the most lethal?

• Toxin A
• Toxin B

What would be a lethal dose of ricin for a man weighing 200 lbs?

• 1.8 mg
• 4 mg
• 0.02 mg
• 90.9 mg

A child shows symptoms of lead toxicity, which is linked to lead based paint on the bedroom window.  This type of poisoning would be considered 

• Acute
• Synergism
• Chronic
• Antagonism

Which principle of toxicology is best illustrated in the diagram?

• Acute Toxicity
• Antagonism
• Chronic Toxicity
• Synergism

Nickel chloride has an LD50 value of 105 mg/kg. What toxicity level would this be classified as?

• High
• Moderate
• Practically Nontoxic
• Extreme

Cyanide is a poison that interferes with the mitochondria.  It prohibits the mitochondria from performing cellular respiration, causing the mitochondria to be unable to manufacture ATP (the energy of the cell). 
What is the target of cyanide?

• Cell
• Mitochondria
• Prohibits cellular respiration