Lethal dose 50

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

In what units are Lethal Dose50 (LD50) expressed?

• oz/lb

• mg/lb

• oz/kg

• mg/kg

Tags

NGSS.MS-PS1-2

Nothing with an LD50 can be good or useful at any quantity.

• True

• False

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

The dose of a poison that kills half of a test population is called the:

• LD1

• LD-half

• LD100

• LD50

Which chemical is the most toxic?

• A

• B

• C

• D

What is the LD50 for Toxin B?

• 10 mg
• 13 mg
• 25 mg
• 50 mg

A dose that is represented as LD₅₀

• shows a response in 50% of the population

• kills half of the study group

• is a dose that has an acceptable risk level of 50%

• is a dose that has a threshold response of 50%

• is a dose that is administered to 50% of the population

1 kg = 2.2 pounds. If a person weighs 150 pounds, what is their mass in kg? (rounded to the nearest tenth)

• 330.7 kg

• 300.0 kg

• 150.0 kg

• 68.2 kg

The LD₅₀ for acetaminophen is 2404 mg/kg (rat, oral). 1 kg = 2.2 pounds. How many milligrams of acetaminophen would be a lethal dose for a 150 lb adult? (rounded to the nearest tenth)

• 360600.0 mg

• 16.0 mg

• 2404 mg

• 163928.8 mg