ps381 quiz #6 questions

Sensory receptor cells convert or transduce energy or chemical information from the environment into

a neural signal

Sensory receptors found in the skin include which of the following:

Merkel's disc

Rufini's ending is located in what layer of the skin?

hypodermis

The concept of "labeled lines" represents the idea that particular axonal nerve tracts are selective for distinctive sensory experiences such as vision versus audition or touch etc

True

Energy of any particular kind (sound, light, heat) can be conducted directly to the brain without neural transformation

False

Each type of sensory receptor has a distinct pathway to a distinct area of the brain

True

Free nerve endings signal which of the following sensations:

pain

Rufini's ending signals "temperature"

False

Nociceptors respond to unpleasant or noxious stimulation

True

Vanilloid is a noxious stimulus

True

TRPV1 is a receptor that is sensitive to capsaicin, the chemical that makes chili peppers hot

True

Mice or other animals that lack the TRPV1 receptor are hypersensitive to heat

False

The TRP2 receptor uses small, unmyelinated nerve fibers to transmit slower signals to the brain

False

The bird version of the TRPV1 receptor is sensitive to capsaicin the same as in mammals

False

To be faster conducting, nerve fibers must use which of the following strategies:

myelination

Phasic receptors adapt rapidly and give a transient response

True

Cortical somatosensory cells have receptive fields in the skin

True

Receptive fields have uniform response properties that do not vary across a spatial area

False

The body's skin surface is represented in a nearly random somatosensory cortical map

False

The M in CMR1 stands for menthol

True