Which of these is considered to be a heavy metal?
A) Se
B) Li
C) Cd
D) I
Correct Answer:
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Q25: Acetylcholine is a chemical messenger that
A)activates the
Q26: Iron (as Fe²⁺)is
A)toxic at all concentrations.
B)safe at
Q27: The cause of itai-itai,the "ouch-ouch" disease is
A)cadmium.
B)mercury.
C)lead.
D)iridium.
Q28: Botulin,the most deadly poison known,is
A)organophosphorus pesticide.
B)a nerve
Q29: Which of these is NOT considered a
Q31: Nitrate acts as a poison by
A)oxidizing hemoglobin
Q32: Pb (as Pb²⁺)is
A)toxic at all concentrations.
B)safe at
Q33: The antidote for mercury poisoning is
A)atropine.
B)nicotine.
C)BAL.
D)coniine.
Q34: Organophosphorus compounds are used as
A)insecticides.
B)antiviral agents.
C)antipsychotic drugs.
D)antibiotics.
Q35: The antidote for poisoning by organophosphorus nerve
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