Intro to toxicity

Question 1

Median Lethal Time

Answer 1

Average time for 50% of the population to die following acute administration of chemical at a certain concentration LT50 or LTM

Question 2

How to homogenous populations react to toxicity

Answer 2

Individuals react in the same way

Question 3

Heterogenous populations and toxicity

Answer 3

Some individuals in a population more sensitive than others. Shallow response curve (45 degrees)

Question 4

Median lethal concentration

Answer 4

When 50% of the population die WITHIN A SPECIFIC TIME

LCM or LC50

Question 5

Effective concentration

Answer 5

50% organisms suffer a sub-lethal effects EC50

Question 6

List some sub lethal effects

Answer 6

Inhibitory - Growth/development of organism, reproductive problems,respiration.
Morphological - Vertebral damage , tissue changes
Behavioural - Feeding, swimming strange, loss of intuition (where the fuck do i migrate too?????)
Tainting - Taste/colour - light oils