Final answer:
Botox and tetanus toxin target nerve cells, with Botox preventing acetylcholine release for muscle relaxation and tetanus toxin blocking inhibitory neurotransmitter release leading to muscle contractions.
Step-by-step explanation:
The cells targeted by Botox and tetanus toxin are nerve cells. Botox, produced by Clostridium botulinum, works by blocking the release of acetylcholine from motor neurons, thus preventing muscle contraction. This results in a flaccid paralysis of muscles. On the other hand, tetanus toxin, produced by Clostridium tetani, affects inhibitory interneurons. It prevents the release of inhibitory neurotransmitters glycine and gamma-aminobutyric acid (GABA), leading to continuous muscle contraction and the symptoms associated with tetanus.