An Infant's Heart Rate Decreases When a Tone Is Presented

question 169

Multiple Choice

An infant's heart rate decreases when a tone is presented. After the tone has been presented 20 times, it no longer causes a change in heart rate. Then, on trial 21, the loudness of the tone is decreased. It is most likely that the heart rate will __________ as a result of __________.

• A) decrease...dishabituation
• B) increase...dishabituation
• C) decrease...habituation

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Definitions:

Haustoria

Specialized structures of parasitic plants or fungi that penetrate host tissues to extract water and nutrients.

Root Nodules

Structures formed on the roots of certain plants, such as legumes, that house nitrogen-fixing bacteria, aiding in the conversion of atmospheric nitrogen into a form the plant can use.

Bacteria

Single-celled microorganisms that can exist either as independent (free-living) entities or as parasites, and may cause disease or be beneficial, playing key roles in processes like fermentation and decomposition.

Fungi

A kingdom of spore-producing organisms that feed on organic matter, including molds, yeast, mushrooms, and toadstools.