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23 Cards in this Set
- Front
- Back
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Sensory intensity is coded as what?
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Action Potential frequency
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Ionotropic Receptors
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Sense pressure, warmth, and electricity
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Metabotropic Receptors
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Sense light
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Chemoreceptors
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Part of the sensory system that detects chemicals by receptor proteins
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Olfaction (smell)
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The number of smells are greater than the number of receptors.
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Olfactory Bulb
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Axons from neurons with same receptors converge on glomeruli
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Glomeruli
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complex smells activate unique combinations of glomeruli
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Gustation (taste)
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Taste Buds are clusters of chemoreceptors which connect to sensory neurons
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Salty and Sour tastes
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Ionotropic Receptors
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Sweet and Bitter tastes
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Metabotropic Receptors
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Umami (savory, meaty taste)
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Metabotropic Receptors
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Process of gustation
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Receptor cell binds the chemical
Membrane Potential changes Neurotransmitters released onto sensory neuron's dendrites |
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Mechanoreceptors
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Detect force
-Physical distortion of plasma membrane opens ion channels, which leads to an AP |
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Types of Mechanoreceptors
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1. Touch receptors in skin
2. Stretch receptors in muscles (match contraction strength to load) |
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Auditory Information
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Lympanic membrane (ear drum) vibrates with same frequency of sound waves and passes vibrations to the middle ear
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Middle Ear
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Ossicles transmit tympanic membrane vibrations to smaller movement by greater force to the oval window-which amplifies sound waves
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Oval Window
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Passes vibrations to the Cochlea as sound waves in fluid with hairs
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Cochlea
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Has 2 membranes. Organ of Corti contains all th hair cells (mechanoreceptors)
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Organ of Corti
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Contained on the Basilar membrane. As the organ shrinks, the hairs pick up different frequencies. Short part detects high sounds, long part detects lower sounds
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Light Detection (Photosensitivity)
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Photoreceptors have pigments in the plasma membrane
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Rod Cells
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Night Vision
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Cone Cells
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Bright Colors
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Process of Vision (Opsin)
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Light hits a photoreceptor. Receptor changes shape when it absorbs light. Membrane potential changes and triggers AP.
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