Consider the Research on the Brain Sizes of Different Animals

question 180

Multiple Choice

Consider the research on the brain sizes of different animals. According to this research, (domesticated) dogs should have ____ than (wild, pack-living) wolves after adjustment for differences in body weight.

• A) larger frontal lobes
• B) larger left hemispheres
• C) larger brains in general
• D) smaller brains in general

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Definitions:

Dorsal Respiratory Group

A cluster of neurons located in the medulla oblongata that plays a crucial role in regulating the rhythm of breathing.

Central Chemoreceptors

Brainstem neurons that detect changes in the pH of cerebrospinal fluid and help regulate ventilation rate.

Peripheral Chemoreceptors

Sensory receptors located in the carotid bodies and aortic bodies that detect changes in the chemical composition of the blood, primarily oxygen, carbon dioxide, and pH levels.

Irritant Receptors

Sensory nerve endings that respond to chemical, mechanical, or thermal stimuli by initiating the reflex actions such as coughing or sneezing.