12.1 General and Special Senses

January 6, 2018 | Author: Anonymous | Category: Science, Health Science, Neurology
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Sponge: Set up Cornell Notes on pg. 41 Topic: 12.1 General and Special Senses Essential Question:

1. What is the major difference between General and Special Senses?

12.1 General and Special Senses 2.1 Atoms, Ions, and Molecules

Pg. 40 1. Name your 5 senses. 2. There are two types of senses, general senses and special senses, hypothesize which of the 5 senses belong in each category.

General Senses General Senses are those with receptors that are widely distributed throughout the body Ex: Skin, various organs, muscles, and joints, viscera


Which of the 5 sensory receptors goes with each type of general sense? • Touch/Pressure • Mechanoreceptors • Temperature • Thermoreceptors • Pain • Pain receptors

General Senses General Senses can be divided into three groups:

• Exteroceptive senses – senses associated with changes at the body surface • Ex: touch, pressure, temperature, pain • Visceroceptive senses – senses associated with changes in viscera (internal organs) • Ex: blood pressure stretching blood vessels, ingesting a meal • Proprioceptive senses – senses associated with changes in muscles and tendons and in body position 5

Special Senses Special Senses have more specialized receptors whose receptors are located in the complex sensory organs of the head

Based on their location, hypothesize which senses are “special senses”


Which type of receptor goes with each type of special sense? • Smell • Chemoreceptors (olfactory receptors) • Taste • Chemoreceptors (taste cells aka gustatory cells-located in taste buds)

• Hearing • Mechanoreceptors (hair cells) • Vision • Photoreceptors (rods and cones)

Special and General Senses (5m25s) Pg. 40 • Take 3-5 bullets about each sense

• • • • •

Vision Hearing Taste Smell Touch

(Video in this order)

All senses work basically the same way: • Sensory receptors stimulate neurons to send impulses along sensory fibers to the brain • There the cerebral cortex forms a “perception”

In your own words… Pg. 40 Explain what you think the difference is between

Sensation and


. 10

Senses Sensation is a feeling that occurs when brain becomes aware of sensory impulse based on new experiences or recalled memory • The resulting sensation depends on which region of the cerebral cortex receives the impulse

A pleasant sound Ex: a soft Touch

Small black lines 11

Sensations Projection is a process in which the brain projects the sensation back to the apparent source • It allows a person to pinpoint the region of stimulation • Exs: • The eyes see an apple • The nose smells an apple • The ears hear the crunch as we bite into an apple


Senses Perception is a person’s view of the stimulus; the way the brain interprets the information

Classical music playing Ex: the feel of a hand

Letters on an eye chart 13

Pathways From Sensation to Perception (Example of an Apple)

Pg 40 14

Let’s take a look at how your brain “perceives” these optical illusions. Write down the first picture you see.

Pushing the Limits: Sensation (8m 11s)

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