Toxicology and LD50

Ethanol has an LD₅₀ of 7,060mg/kg. What would be the lethal dosage for an individual who weighs 35kg?

• 247,100 mg

• 201.71 mg

• 0.00014 mg

• 24,700 mg

Arsenic has an LD₅₀ of 15mg/kg. How many mg of arsenic is toxic to an individual who weighs 100 kg?

• 15 mg

• 1,500 mg

• 6.7 mg

• 0.15 mg

The LD₅₀ for Vitamin A is 2000mg/kg, how many chewable vitamin tablets would a 10kg child have to consume to reach the LD₅₀ if each tablet contains 1mg of Vitamin A

• 2000 tablets

• 20000 tablets

• 1000 tablets

• 10000 tablets

In what units are Lethal Dose50 (LD₅₀) expressed?

• oz/lb

• mg/lb

• oz/kg

• mg/kg

Lethal dose (LD₅₀) values are determined by the amount of a substance that:

• kills at least 50 individuals of the test population exposed to the substance

• kills a test population when given at least 50 ml of the substance

• kills at least 50% of the test population exposed to the substance

• kills a test population when given at least 50g of the substance

Toxins that get passed up the food chain in increasing amounts

• biomagnification

• compaction

• compounding

• non-elimination

The concentration of a toxin that will result in the loss of 50% of a population

• LD50

• IPM

• CAFO

• NH4

• TP50

If 1mg/kg of mass of a pesticide is the LD50 for rats in an experiment, what would be considered safe exposure for humans

• 1mg/kg
• .1mg/kg
• .01mg/kg
• .001mg/kg

How many grams of sugar (LD50 = 30 g/kg) would be lethal to a 220 lb woman?

• 6600 g

• 3000 g

• 0.30 g

• 0.13 g

Which of the substances below is the LEAST toxic?

• Cola (LD50 = 140mg/kg)
• Aspirin (LD50 = 200mg/kg)
• Chlorine (LD50 = 850 mg/kg)
• Vitamin A (LD50 = 2000 mg/kg)