# NURSING ANM AND GNM

## NURSING EXAM QUESTIONS

### TOXICOLOGY

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Arsenic has an LD50 of 15mg/kg. How many mg of arsenic is toxic to an individual who weighs 100 kg?
 A 15 mg B 1, 500 mg C 6.7 mg D 0.15 mg
Explanation:

Detailed explanation-1: -LD50 can be calculated using the formula LD50 = ED50/3 x Wm x 10-4. It is expressed in mg/kg bw/d or milligram of a substance per kilo of body weight administered per day.

Detailed explanation-2: -LD50 less than 500 mg/kg indicates high toxicity. LD50 500 to 1, 000 mg/kg indicates moderate toxicity. LD50 1, 000 to 2, 000 mg/kg indicates low toxicity.

Detailed explanation-3: -LD50 is the abbreviation used for the dose which kills 50% of the test population. LC50 is the abbreviation used for the exposure concentration of a toxic substance lethal to half of the test animals. LD50 is expressed in milligrams per kilogram of body weight of the test animal (which must be mentioned).

There is 1 question to complete.