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Neuro Exam 2
Sensory Systems
Question | Answer |
---|---|
What is the sensory system? | the special senses associated with vision, hearing, smell, taste, and touch. The sensory system receives stimuli and sends the impulses to the brain to be interpreted. |
What are the senses animals have? (8) | temp, pain, itch, balance, proprioception, blood pressure, hunger, and thirst |
What is Exteroception? | One’s sense of the external world. Stimuli comes from outside the body |
What is Introception? | One’s sense of the internal state of the body. Stimuli come from inside the body. |
What is Sensory Transduction? | The process through which a receptor cell converts the energy in a stimulus into an electrical signal |
What are the 4 forms of stimulus energy? | Electromagnetic (light), Chemical (tastants/odorants), Mechanical (sound, touch, vibration), and Thermal (temp) |
Purpose of sense organs? | Contain sensory receptor cells that transduce sensory signals along with non neural tissues |
What are Chemoreceptors activated by? | Activated by binding of chemicals (taste, smell, pain) |
What are Photoreceptors activated by? | Activated by photons of light (vision) |
What are Thermoreceptors activated by? | Activated by changes in temp (temp, pain) |
What is sensory transduction? | the process through which a receptor cell converts the energy in a stimulus into an electrical signal |
What does the activation of sensory receptor molecules on receptor cells generate? | a receptor potential: a local change in the membrane potential of a receptor cell. |
What are taste receptor cells activated by? | In the taste system, taste receptor cells express taste receptors that are activated by tastants |
What rods and cons express opsin activated by? | In the visual system, rods and cones express opsins that are activated by exposure to photons of light |