ANFS350 Lecture Notes - Lecture 4: Sensory Neuron, Mechanoreceptor, Chemoreceptor
22 Sep 2019
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Animals acquire environmental information from their sensory systems. When they got to him there was a lot of touch involved. Specialized nerve endings that respond to environmental stimuli and transmit information via neurons. Sensory cell -> sensory neuron -> central nervous system. Detect chemicals that are perceived as tastes and odors. The detection of dissolved chemicals, often within the mouth. The detection of airborne chemical stimuli, often with the nose. Gaseous chemical that is perceived as odorous. Volatile, organic species specific compounds that affect the behavior of conspecifics. Measured water ventilation rate of individuals presented with. Chemoreceptor example - mate choice in lizards. Femoral glands of the male lizard produce pheromones. These pheromones transmit information about an individual"s fitness. Presented a female with two similar sized males. Females preferred the male with increased level of pheromone. Photoreceptors contain photosensitive opsin proteins that change shape when struck by light, generating nerve impulse.
