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Chapter 22. Toxic Effects of Pesticides
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Which of the following does NOT contribute to the environmental presence of organochlorine insecticides?
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a. high water solubility.
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e. slow rate of degradation.
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All of the following are characteristic of DDT poisoning EXCEPT:
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b. hypertrophy of hepatocytes.
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c. increased potassium transport across the membrane.
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d. slow closing of sodium ion channels.
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Anticholinesterase agents:
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a. enhance the activity of AChE.
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b. increase ACh concentration in the synaptic cleft.
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c. only target the neuromuscular junction.
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d. antagonize ACh receptors.
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e. cause decreased autonomic nervous system stimulation.
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All of the following symptoms would be expected following anticholinesterase insecticide poisoning EXCEPT:
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d. increased blood pressure.
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Which of the following insecticides blocks the electron transport chain at NADH–ubiquinone reductase?
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What is the main mechanism of pyrethroid ester toxicity?
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a. blockage of neurotransmitter release.
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b. inhibition of neurotransmitter reuptake.
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c. acting as a receptor agonist.
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d. causing hyperexcitability of the membrane by interfering with sodium transport.
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e. interfering with Cl− transport across the axonal membrane.
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Which of the following herbicides is NOT correctly paired with its mechanism of action?
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a. glufosinate—inhibition of glutamine synthetase.
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b. paraquat—interference with protein synthesis.
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c. glyphosate—inhibition of amino acid synthesis.
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d. chlorophenoxy compounds—growth stimulants.
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e. diquat—production of superoxide anion through redox cycling.
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