Infrasonic Frequencies Below Hz Are Not Detected by the Human

question 34

Multiple Choice

Infrasonic frequencies below Hz are not detected by the human ear, whereas ultrasonic frequencies above Hz are inaudible vibrations.

• A)5; 20
• B)10; 10,000
• C)20; 20,000
• D)5; 200,000
• E)100; 100,000

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Definitions:

Amplification

In a biological context, the process by which a signal is intensified, as in the enhancement of a signal in a biochemical pathway.

Sympathetic Neurons

Neurons that are part of the sympathetic nervous system, responsible for the body's 'fight or flight' response.

Neural

Pertaining to the nerves or the nervous system.

Autocrine

Relating to or denoting a mode of hormone action where a hormone affects the same cell type that produced it.