1. ___________ exposure refers to repeated exposure to chemicals  

1. Most affected organ attacked by a chemical is called _______________ organ. 

1. An ___________reaction, or sensitization as it is also called, may appear after repeated contact to a substance such as nickel.  

1. ________________ is the science of adverse effects of chemical substances on living organisms.  

1. The best method and should be the first choice in controlling hazardous chemicals is by ___________________.  

1. The numerical values of LD₅₀ and LC₅₀ depend on several factors, such as  

(a)_________________

(b)_________________

(c)_________________

(d)_________________

(e)_________________

12.________________________________________________________ is a time-weighted average concentration for an eight hour working day or 40 hours a week to which nearly all workers may be repeatedly exposed without adverse effect.

13. Name any Four chemical groups that cause health risk.  

(a)______________________________

(b)_______________________________

(c) _______________________________

(d) _______________________________

14. Explain the effect of chemical interaction as describe by the mathematical equation 0+1 = 3 ?    

15. Describe briefly any three main routes in which toxicant can be eliminated or rendered ineffective in human body.  

16. Explain briefly what is target organ. Name the chemical that target the kidney of a painter.  

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The detailed answer for the above question is provided below 1 Chronic exposure refers to repeated exposure to chemicals 2 The most affected organ att... View the full answer