QUIZ 6.3

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What is unusual about olfactory receptors compared to most other mature mammalian neurons?​

They are replaceable when old neurons die.

Each receptor responds to a wide range of stimuli and contributes to the perception of each of them. This type of coding is referred to as ____.​

across-fiber

In adult humans, the taste buds are ____.​

concentrated along the outside edge of the tongue

Reduced response to one taste after exposure to another is referred to as ____.​

cross-adaptation

Taste and smell axons converge onto many of the same cells in an area called the ____.​

endopiriform cortex

How many kinds of olfactory receptors do we have?​

hundreds

Olfactory information is coded in receptor cells through ____.​

hundreds of types of receptor molecules, each responsive to a different chemical

Each receptor responds to a limited range of stimuli and sends a direct line to the brain. This type of coding is referred to as ____.​

labeled-line

The receptors for taste are ____.​

modified skin cells

The vomeronasal organ (VNO) is a set of receptors located ____.​

near, but separate from, the olfactory receptors

The taste nerves initially project to the ____.​

nucleus tractus solitarius

Olfactory receptors carry their message to the ____.​

olfactory bulb

Many women living in a college dormitory will gradually begin to synchronize their menstrual cycles. The research indicates that this is, at least in part, based on ____.​

pheremones

Taste perception in the brain depends on ____.​

relative activity of different taste neurons

Olfaction also plays a subtle role in ____.​

social behavior

A person who "sees" spoken language or music may be experiencing ____.​

synesthesia

We can identify a wide variety of bitter substances because ____.​

we have many different bitter receptors

If you are a supertaster, then ____.​

you are more sensitive than the average person to nearly all tastes

Olfactory information is coded in receptor cells through ____.​

​hundreds of types of receptor molecules, each responsive to a different chemical

Repeated exposure to male pheromones may be associated with ____ in young women who are not sexually active.​

​more regular menstrual cycles

Chemicals that prevent sodium from crossing the membrane ____.​

​reduce the intensity of salty tastes


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