Now let’s talk about our other senses…. Our Essential Question How do we get information from our world, not using our eyes or ears?

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Presentation transcript:

Now let’s talk about our other senses…

Our Essential Question How do we get information from our world, not using our eyes or ears?

Other Senses: Taste (Gustation)

Taste Taste is a chemical sense The receptor cells for taste are the taste buds

Taste ~ 7,500 taste buds Food dissolves (saliva) on these receptors  TRANSDUCTION occurs Damaged taste receptor cells replaced within a few days to 2 weeks

Taste Sensations –sweet –sour –salty –bitter

Supertasters People with an abundance of taste receptors Approximately 25% of the population –More likely women, Asians, Africans

Nontasters People with a minimum of taste receptors Taste with less intensity than the rest of the population Approximately 25% of the population

Other Senses: Smell

Smell Chemical Taste and smell interact Temporal lobe

Olfactory Cells The chemical receptor cells for smell Located in the nasal passages Detect molecules in air

Smell

Time to do an Experiment Please get two pack of starburst Wait for instructions What did you discover??

Other Senses: Touch

Touch Touch receptors are on the skin 4 basic skin senses –Pain, warmth, cold and pressure skin sensations = combination of these 4 basic senses Somotosensory cortex

Sensitivity of Diff Body Parts to PAIN Most Sensitive Back of knees Neck region Bend of elbow Least Sensitive Tip of the Nose Sole of foot Ball of thumb

Gate-Control Theory of Pain Pain messages travel on one set of nerve fibers containing pain gates –The gates are open when pain is felt Other sensory messages go through another set of fibers –The non-pain fibers can close the pain gates to stop the sense of pain – Yhs4

Other Senses: Vestibular

Vestibular Sense Sense of balance and body position Receptor cells: hair cells in inner ear Motion sickness = overstimulation Parietal lobe

The last sense….

Kinesthetic Sense Sense of the position and movement of individual body parts Receptor cells in muscles and joints Your leg “falling asleep” Parietal lobe

Let’s Review Name the senses How many are there? Think again…

The senses 1.Vision 2.Hearing 3.Tasting 4.Touching 5.Smelling 6.Vestibular 7.Kinesthetic Now briefly describe what each one does

How do the senses interact? Identify the physiological features common across all sensory systems.