Iron (as Fe²⁺) is
A) toxic at all concentrations.
B) safe at all concentrations.
C) toxic at high concentrations, essential at low concentration.
D) toxic at high concentration, not known to be essential.
Correct Answer:
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Q21: Arsenic compounds are poisons because they
A)deactivate enzymes.
B)catalyze
Q22: Lead poisoning affects the
A)digestive system.
B)endocrine system.
C)reproductive system.
D)central
Q23: Lead is used in
A)paint.
B)some gasolines.
C)plumbing fixtures.
D)Lead is
Q24: Curare,the blow dart poison of Amazonian Indians,disrupts
Q25: Acetylcholine is a chemical messenger that
A)activates the
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
Q30: Which of these is considered to be
Q31: Nitrate acts as a poison by
A)oxidizing hemoglobin
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