taste and smell part 2 Flashcards Preview

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Flashcards in taste and smell part 2 Deck (32):
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Olfactory receptor cells

replaced every 1-2 months by basal cells in the olfactory epithelium

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olfactory epithelium

olfactory receptor cells/neurons, basal cells and support cells

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----- of olfactory receptor cells extend to the surface of the olfactory epithelium and terminate with a --------region from which non-motile cilia project.

Dendrites of olfactory receptor cells extend to the surface of the olfactory epithelium and terminate with a rounded knoblike-region from which non-motile cilia project.

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Cilia

extend into the mucus layer and possess receptors for odorant molecules

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Unmyelinated axons of olfactory receptor cells to

olfactory filia to olfactory nerve

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Unmyelinated axons of olfactory receptor cells

pass through the lamina propria

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place where the olfactory axons synapse After passing through the cribiform plate

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Receptors responsive to different odorant molecules are ----- in the olfactory epithelium

Receptors responsive to different odorant molecules are intermingled in the olfactory epithelium

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Unmyelinated axons of olfactory receptor cells travel through the ------ -----(ethmoid bone) and terminate in the -----

------

Theses axons travel through the cribiform plate (ethmoid bone) and terminate in the olfactory bulb.

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cribiform plate

ethmoid bone

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At the level of the glomeruli, the axons of olfactory neurons carrying --- olfactory information synapse in the --- glomerulus.

©At the level of the glomeruli, the axons of olfactory neurons carrying similar olfactory information synapse in the same glomerulus.

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tf CN1 will emerge thru ant cranial fossa

T thru cribiform plate

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Neurons in the anterior olfactory nucleus cross via the ----- commissure, to the ------ olfactory bulb

Neurons in the anterior olfactory nucleus cross via the anterior commissure, to the contralateral olfactory bulb

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Glomeruli respond selectively to --- ----- that characterize the complex odor.

Glomeruli respond selectively to one or two molecules that characterize the complex odor.

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tf Odor information is carried along the olfactory tract (axons of mitral and tufted cells) to one  areas

Odor information is carried along the olfactory tract (axons of mitral and tufted cells) to several areas

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The relay through the thalamus occurs after afferents reach the ----- ----- ----- but prior to olfactory info traveling to association cortex (eg. -----)

The relay through the thalamus occurs after afferents reach the primary olfactory cortex but prior to olfactory info traveling to association cortex (eg. orbitofrontal cortex

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Convergence in the orbitofrontal cortex,

from the gustatory, somatosensory, olfactory and visual cortical areas

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Mitral Cells  and tufted cells

also contribute to the glomerulus)

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Primary olfactory cortex 

(piriform cortex, periamygdaloid cortex, anterior parahippocampal gyrus)

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which of follwowing areas is not where Olfactory tract fibers terminate

Anterior olfactory nucleus

post olfactory nucleus

 Olfactory tubercle

 Amygdala

olf. bulb

post olfactory nucleus

and olf bulb

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ability to discriminate and identify odors

Primary Olfactory Cortex

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Primary Olfactory Cortex

is located in the uncus of the temporal lobe

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Anterior parahippocampal gyrus

Primary Olfactory Cortex

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perception of flavor

integration in orbitofrontal cortex

 

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Taste-responsive cells of primate amygdala and hypothalamus

complex tastemediated behaviors

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Hippocampus –

concerned with learning associated with feeding

projections from prim olfactory cortex

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concerned with feeding behaviors

Hypothalamus

(has projections from primary olfactory cortex)

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Bilateral lesions in the ventral medial hypothalamus

voracious appetite and resulting obesity

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Bilateral lesions of the ventral lateral hypothalamus

failing to feed and wasting

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