Chpt. 4 Toxicity of Pesticides

Question 1

____ is the capacity of a substance to injure or poison a living system, such as a human being, and animal, a lake, or a forest.

Answer 1

Toxicity

Question 2

What is pesticide exposure?

Answer 2

Coming in contact with a pesticide

Question 3

____ _____ refers to how poisonous a pesticide is after short-term exposure.

Answer 3

Acute toxicity

Question 4

___ ___ is a on-time or short term contact with pesticide.

Answer 4

Acute exposure

Question 5

___ ___ is a delayed poisonous effect from exposure to a substance.

Answer 5

Chronic toxicity

Question 6

___ ___ is longer term repeated contact with pesticides.

Answer 6

Chronic exposure

Question 7

The effects of which type of exposure can be more easily detected and studies.?

Answer 7

Acute

Question 8

A pesticide dose is the ___ of pesticide to which a surface, plant or animal is exposed.

Answer 8

Amount

Question 9

Name the Three routes by which pesticide can enter the body.

Answer 9

Dermal, oral and inhalation

Question 10

Some pesticides are poisonous no matter how they enter the body/
True or False.

Answer 10

True

Question 11

Which pesticide solution is most likely to be absorbed through the skin?

Answer 11

Oil-based

Question 12

Which areas of the body absorb pesticides quickly?

Answer 12

Eyes, ears, scalp and genitals

Question 13

Which two routes of entry are likely to be most important to you?

Answer 13

Dermal and inhalation.

Question 14

Which factor affects the toxicity of a pesticide?

Answer 14

Route of entry
Frequency and duration of exposure
Dose received

Question 15

An example of a chronic effect is the drop in ___, an essential body enzyme, cause by organophosphates and carbamates.

Answer 15

Cholinesterase

Question 16

___ effects occur at the site of contact with a pesticide while ___ effects occur away from the point f contact.

Answer 16

Local

Systemic

Question 17

Skin rash, nausea, eye irritation, and dizziness are examples of ___ toxic effects.

Answer 17

Reversible

Question 18

LD50 means ‘Leathal Dose Fifty’. it Refers to the amount of a chemical that kills ___ the animals exposed to it in a laboratory test.

Answer 18

half (50)%

Question 19

The smaller the LD50 value, the less chemical required to be fatal, so the more poisonous the pesticide.
True or False

Answer 19

True

Question 20

Acute oral toxicity and acute dermal toxicity are measure as LD50. The higher the LD50 the ___ (more or less) toxic the pesticide.

Answer 20

Less

Question 21

How is LD50 used?

Answer 21

LD50 is used with other tests to place pesticides in a ‘toxic category’ and give them a ‘signalword’

Question 22

LC50 means ‘Lethal ___ Fifty’. It refers to the amount of chemical in the air that caused half of the test animal s to die when they inhaled it.

Answer 22

Concentration

Question 23

What signal word must be on the label for pesticides classifies as ‘relatively non-toxic’?

Answer 23

CAUTION!

Question 24

Six milligrams per kilogram (mg/kg) is equal to ___ parts per million.

Answer 24

6

Question 25

What signal word must be on the label for pesticides classifies as ‘highly toxic’?

Answer 25

DANGER!

Question 26

What signal word must be on the label for pesticides classifies as ‘Slightly toxic’?

Answer 26

CAUTION!

Question 27

What signal word must be on the label for pesticides classifies as ‘Moderately toxic’?

Answer 27

WARNING!

Question 28

The toxicity of a substance is its ability to cause injury, while ___ is the risk or chance that harm will come from using the pesticide.

Answer 28

Hazard

Question 29

Is a highly toxic material always very hazardous?

Answer 29

No, if a highly toxic material is handled properly it could actually pose low risk or hazard.