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Senses

Senses. Smell and Taste. Taste. Chemoreceptors (stimulated by chemicals) are located on the tongue When each of these receptors comes into contact with the specific chemicals they sense the send a signal via an afferent nerve to the brain. Taste Bud. Taste cont.

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Senses

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  1. Senses Smell and Taste

  2. Taste • Chemoreceptors (stimulated by chemicals) are located on the tongue • When each of these receptors comes into contact with the specific chemicals they sense the send a signal via an afferent nerve to the brain Taste Bud

  3. Taste cont. • There are 5 different taste receptors • Salty • Sweet • Sour • Bitter • Umami • These 5 tastes are received in the somatosensory cortex of the brain

  4. Smell • 80% of what we consider flavor comes from our sense of smell • Chemoreceptors hang from the roof of the nasal passage and are bathed in neurons • There are 1000 different types of smell sensory receptors that respond only to specific odorant chemicals

  5. Smell Cont. • Information is passed from the sensory receptors via afferent neurons to the olfactory bulbs • From there this information is passed to the limbic system (area of the brain associated with emotional, food getting, and sexual behaviors) • Activation of precise combinations of smell receptors allow us to identify many different types of smells

  6. Smell cont. • The ability to smell different things varies with: • Attentiveness • Hunger • Gender (women are better, generally) • Smoking • Age (older people do not smell as well)

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