Nerve cells (neurons) are connected by
A) cilia
B) ligaments
C) gaps or synapses across which chemicals called neurotransmitters flow
D) none of these
Correct Answer:
Verified
Q12: Heavy metals such as mercury, thallium, and
Q13: Highly polar substances such as water efficiently
Q14: Lead poisoning can cause
A)mental retardation and hyperactivity
Q15: Medications and toxins alike can enter the
Q16: Mutagens such as benzo[ᶏ]pyrene can cause changes
Q18: Neurotoxins interfere with the
A)Citric Acid cycle
B)Krebs cycle
C)Acetylcholine
Q19: Nitrogen dioxide (NO2) is
A)very dangerous to humans,
Q20: PCBs, or polychlorinated biphenyls,
A)are used today extensively
Q21: Poisons that show up in the environment
Q22: Select the accurate statement.
A)Exposure to lead and
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