The answer is "d. to study the consequences of blocking action potentials".
Toxins are substances made by plants and creatures that are harmful to people. Toxins additionally incorporate a few medications that are useful in little measurements, yet toxic in substantial sums.
Most Toxins that cause issues in people originate from germs, for example, microscopic organisms. For instance, cholera is caused by a harmful microorganisms.
Different toxins that reason issues incorporate metals, for example, lead, and certain synthetic compounds in the earth.
