Feeling Tired After a Long Day of Work, You Walk

question 30

Multiple Choice

Feeling tired after a long day of work, you walk across a parking lot at night to get to your car. As you approach the car you see a shadow extending behind the back of the car. You immediately feel a rush of energy, your heart starts pounding, and you feel wide awake and alert. You are experiencing

• A) an allergic reaction.
• B) a drop in blood pressure.
• C) the fight-or-flight response.
• D) effects of endocrine disruptors.

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Definitions:

Greek Letter

Characters from the Greek alphabet used in mathematics, science, and engineering as symbols for constants, variables, and coefficients.

Band-rejection Filter

A filter designed to block frequencies within a specific range while allowing frequencies outside of that range to pass.

Filter Circuit

An electronic circuit designed to remove unwanted components of a signal, such as noise, or to select desired ranges of frequencies.

Opposition

In electrical terms, this refers to the resistance or impedance that a circuit presents to the flow of electric current.