The Senses EQ: How does your body detect changes?

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Presentation transcript:

The Senses EQ: How does your body detect changes?

Root Words

Link 

Sensation: Occurs when the brain becomes aware of sensory impulses Perception: Occurs when the brain interprets those sensory impulses.

5 Types of Receptors Chemoreceptors Pain Receptors Thermoreceptors Stimulated by changes in chemicals Pain Receptors Stimulated by pain Thermoreceptors Changes in temp. Mechanoreceptors Changes in pressure or movement Photoreceptors Changes in light energy

Touch and Pressure Touch and pressure derive from 3 kinds of receptors Free Nerve Endings Tactile (Meissner’s)Corpuscles Lamellated (Pacinian)Corpuscles

Free Nerve Endings Located in Epithelial Tissue. Responsible for sensation of itching

Tactile (Meissner’s) Oval, connective tissue Hairless portion: lips, fingertips, palms, nipples Sensation of light touching

Lamellated (Pacinian) Large connective fibers Deeper dermal and subcutaneous tissue Senses heavy pressure

Engaging all pressure senses

PAIN!!!! Pain is good, pain receptors protect the body from further tissue damage. Pain adapts poorly. Thus, persistent pain does not fade Visceral Pain: Pain in organs (Only receptors in viscera)

Special Senses (because you’re “special”) Smell Taste Hearing Equilibrium Sight

Taste Taste Buds: receptors located primarily on the tongue Roughly 10,000 taste buds on tongue. ~1,000 on roof of mouth Each “bud” includes 50-150 Taste Cells Salivary gland provides fluid for chemical to enter taste cell

5 Taste Sensations Sweets Sour Salty Bitter Umami (Japanese term meaning delicious)

Taste map is WRONG, there are equal taste cells throughout the tongue

LEFT SIDE ACTIVITY Answer questions 1-11 (Check your Recall) in chapter 10 of your text book. Look on the internet and find the most interesting picture that plays with our sense of sight.

https://www.youtube.com/watch?v=tVgOLWVYytM