Some Neurotoxins Work Essentially the Same Way as Some Local

question 122

Multiple Choice

Some neurotoxins work essentially the same way as some local anesthetics,which is to

• A) inactivate the enzyme that destroys the neurotransmitter only.
• B) bind to Na⁺ channels and inactivate them only.
• C) prevent depolarization by blocking Na⁺ entry into the cell only.
• D) inactivate the enzyme that destroys the neurotransmitter and bind to Na⁺ channels and inactivate them.
• E) bind to Na⁺ channels and inactivate them and prevent depolarization by blocking Na⁺ entry into the cell.

---

Definitions:

Short-Run Average Total Cost (ATC₂)

The total cost divided by the quantity produced in the short-run, where some inputs are fixed.

Diminishing Marginal Returns

A principle stating that if one factor of production is increased while others are kept constant, the resulting increase in output will eventually decline.

Short-Run Average Total Cost (ATC)

The total cost per unit of output in the short run, where some factors of production are fixed.

Profit-Maximizing Level

The output level at which a firm achieves the highest profit, where marginal revenue equals marginal cost.