What type of toxin targets the nervous system, causing paralysis?

Neurotoxins are a specific type of toxin that affects the nervous system, leading to various physiological effects, including paralysis. They disrupt the normal functioning of neurons by influencing neurotransmission, either by blocking the release of neurotransmitters or by interfering with receptors on postsynaptic neurons. This can result in muscle paralysis, as the signals that typically initiate muscle contraction are hindered.

In contrast, other types of toxins serve different functions. Hemotoxins primarily affect the circulatory system, damaging blood vessels and leading to uncontrolled bleeding. Cardiotoxins target the heart muscle, affecting its function and potentially leading to cardiovascular failure. Cytotoxins cause cell damage or destruction in various tissues but do not specifically target neural tissue or impact the nervous system in the way neurotoxins do. Thus, the classification of neurotoxins is specifically linked to their effects on the nervous system, making it the correct answer.