Refer to the figure showing a receptor on a cell. 
Which binds to the region of the receptor indicated by the letter "A"?
Definitions:
Interest Rate
The percentage of a sum of money charged for its use, typically expressed as an annual percentage.
Economic Profit
The difference between a firm's total revenue and its opportunity costs, including both explicit and implicit costs.
Savings Account
A deposit account held at a bank or financial institution that provides principal security and a modest interest rate.
Interest Rate
The percentage of a sum of money charged for its use, often expressed annually.
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