While These Have Less of an Effect on Humans Today,our

question 79

Multiple Choice

While these have less of an effect on humans today,our ancestors smelled ________ that were secreted by other members of the species.Some of these were intended to attract sexual mates.

• A) particles
• B) molecules
• C) pheromones
• D) odors

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Definitions:

Ear Canal

The tubular passage running from the outer ear to the eardrum, responsible for directing sound waves to the middle ear.

Nozzle

A device designed to control the direction or characteristics of a fluid flow (such as water or gas) as it exits an enclosure.

Reticular Activating System

A network of nerves in the brainstem that plays a key role in controlling arousal, wakefulness, and the transition between sleep and wakefulness.

Consciousness

The state of being awake and aware of one's surroundings, sensations, thoughts, and feelings.