Ch.19 The Nervous System Section 3: The Senses

Section 3 Vision – Your eyes respond to the stimulus of light. They convert that stimulus into impulses that your brain interprets, enabling you to see – How Light Enters Your Eye Cornea Pupil Iris – How Light is Focused Lens

Section 3 Vision – How You See an Image Retina – Correcting Nearsightedness

Section 3 Vision – Correcting Farsightedness – What type of lens corrects nearsightedness?

Section 3 Hearing & Balance – Your ears are the sense organs that respond to the stimulus of sound. The ears convert the sound to nerve impulses that your brain interprets. – How Sound is Produced – The Outer Ear

Section 3 Hearing & Balance – The Middle Ear Eardrum – The Inner Ear Cochlea

Section 3 Hearing & Balance – The Inner Ear & Balance Structures in your inner ear control your sense of balance Semicircular canals – Where in the ear are the semicircular canals located?

Section 3 Smell & Taste – The sense of smell and taste work closely together. Both depend on chemicals in food or in the air. The chemicals trigger response in receptors in the nose and mouth – What basic tastes can the tongue detect?

Section 3 Touch – Your skin contains different kinds of touch receptors that respond to a number of stimuli