Misc.

Question 1

In mammals, toxicity amount is described using…

Answer 1

LD 50 in mg/kg BW.

Question 2

In birds, toxicity amount is described using…

Answer 2

LC50 mg/kg feed.

Question 3

In fish, toxicity amount is described using…

Answer 3

LC50 mg/L H2O.

Question 4

Acute toxicity occurs in what time frame?

Answer 4

24 hours.

Question 5

Subacute toxicity occurs within what time frame?

Answer 5

1-30 days.

Question 6

Subchronic toxicity occurs between what time frame?

Answer 6

30-90 days.

Question 7

Chronic toxicity would be described as occurring over what amount of time?

Answer 7

3 months or more.

Question 8

What is chronicity factor?

Answer 8

It is the ratio between acute LD50 and chronic LD50.

Question 9

Extremely toxic = ?

Answer 9

1mg/kg or less.

Question 10

Highly toxic = ?

Answer 10

1 - 50mg/kg.

Question 11

Moderately toxic = ?

Answer 11

50 - 500mg/kg.

Question 12

Slightly toxic = ?

Answer 12

0.5 - 5g/kg

Question 13

Practically non-toxic = ?

Answer 13

5 - 15 g/kg.

Question 14

Relatively harmless = ?

Answer 14

> 15g/kg

Question 15

What is the highest/largest dose which does not result in undesirable or toxic alterations?

Answer 15

Highest non-toxic dose (HNTD)

Question 16

What is the maximum tolerated dose (MTD)?

Answer 16

It’s similar to the highest non-toxic dose.

Question 17

What is the Toxic Dose Low (TDL)?

Answer 17

Lowest dose that produces toxic alterations and administering twice this dose will NOT cause death.

Question 18

What is Toxic Dose High (TDH)?

Answer 18

Dose which produces toxic alterations and administering twice this dose WILL cause death.

Question 19

Describe the no-effect level (max non-toxic level).

Answer 19

Amount of a chemical that can be ingested w/o causing any deaths, illness, or toxic alterations in any animal for a stated period. (usually 90 days to 2 years, depending on the species)

Question 20

What is the highest dose that does not cause any deaths?

Answer 20

LD-0

Question 21

What is the dose that kills 50% of animals in a group?

Answer 21

LD 50

Question 22

What is the lowest dose that kills all the animals?

Answer 22

LD 100