DrDelmar Wants to Determine How Loud a Certain Noise Must

question 13

Multiple Choice

Dr.Delmar wants to determine how loud a certain noise must be in order for it to be heard from a distance of 50 feet.Her question involves the concept of:

• A)relative magnitude.
• B)difference threshold.
• C)absolute threshold.
• D)just noticeable difference (jnd).

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Definitions:

Steroid Hormone

Lipid-based hormones that pass through cellular membranes and bind to specific receptors to alter gene expression.

Protein-Type Hormone

Hormones that are composed of chains of amino acids and interact with cell surface receptors; they include insulin and growth hormones.

Cellular Level

The level of organization that includes cells, the basic structural and functional units of all living organisms.

Negative Feedback Mechanism

A process where the output of a system dampens or reduces the processes leading to the output, maintaining system stability.