Select the chemical asphyxiants that render the body incapable of utilizing an
adequate oxygen supply (because they replace the oxygen in the air or interfere
with the body's oxygen transfer mechanism).
a. Carbon monoxide (automobile fumes) and cyanides.
b. Nitrogen and nitrous oxide (laughing gas used by dentists).
Carbon dioxide (gas produced by plants), hydrogen, and helium.
d. Methane (gases from marshes and mines) and ethane (natural gases and
e. All of the above.
Both a and c.
An anesthetic may be used during surgery as a depressant to the central nervous
system, particularly the brain. However, an anesthetic is a chemical that is
potentially hazard in that its:
a. Effectiveness depends upon the effective concentration in the brain.
b. Degree of anesthetic action depends upon the effective concentration in the
brain as well as upon the specific pharmacological action.
Potency of simple alcohols rises with increasing number of carbon atoms up to
amyl alcohol, which is the most powerful of the series.
d. All of the above.
List four examples of systemic poisons.