GRE Subject Test: Psychology : Olfaction

Study concepts, example questions & explanations for GRE Subject Test: Psychology

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Example Questions

Example Question #1 : Olfaction

Which of the following would constitute the greatest loss to a professional wine taster or food critic?

Possible Answers:

Olfactory loss

Damage to the striate cortex

All of these

Damage to the semicircular canals

Vestibular loss

Correct answer:

Olfactory loss

Explanation:

Assuming that a food critic or wine taster most values their ability to perceive the flavors and aromas of these consumable items, then a loss of their sense of smell—olfactory loss—would be the greatest of these misfortunes they could suffer. The vestibular sense is that which informs us as to the orientation of our bodies in space. The semicircular canals contribute to this sense, and are housed within the inner ears. The loss of this sense might not compromise a food critic or wine taster as severely in their professional life. The striate cortex is a key component of the visual cortex, and damage therein would likely result in partial or total blindness. This would not hinder the food critic or wine taster's abilities to perceive their foods or wines however.

Example Question #1 : Olfaction

Which of the following is true regarding olfaction?

Possible Answers:

Each glomerulus receives input from multiple types of receptors

None of these

Each receptor responds to only one molecule

Every molecule causes the same strength of response when it stimulates a receptor

There are approximately three hundred and fifty receptor types

Correct answer:

There are approximately three hundred and fifty receptor types

Explanation:

There are about three hundred and fifty receptor types involved in olfaction. Each receptor responds to more than one molecule, but with different strengths. Receptors make their first synapse with glomeruli, but each glomerulus receives input from only one type of receptor.

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