what does the sensory system provide? - ✔️✔️provide us with information about the environment
outside and inside our body
what are general properties of sensory systems? - ✔️✔️- a sensory neuron with a transducer (receptor),
that coverts a physical stimulus into an intracellular signal (change in membrane potential)
- usually through the opening or closing of gated channels
what are some examples of chemoreceptors? - ✔️✔️- blood chemoreceptors
- nociceptors
- hypothalamic glucose sensing neurons
- taste, smell
what are some examples of stimuli for chemoreceptors? - ✔️✔️- oxygen
- pH
- various organic molecules such as glucose
what are some examples of stimuli for mechanoreceptors? - ✔️✔️- pressure (baroreceptors)
- cell stretch (osmoreceptors)
- vibration
- acceleration
- sound
what are some examples of mechanoreceptors? - ✔️✔️- touch
- proprioceptors
- nociceptors
- auditory (hair cells)
, - balance (cupula)
What are some examples of stimuli for photoreceptors? - ✔️✔️photons of light
what are some examples of photoreceptors? - ✔️✔️vision (rods and cones)
what are some examples of stimuli for themoreceptors? - ✔️✔️varying degrees of heat
What are some examples of thermoreceptors? - ✔️✔️- thermal receptors
- nociceptors
what are physical stimuli transduced into? - ✔️✔️receptor potentials (graded potentials)
what do receptor potentials induce when reaching threshold? - ✔️✔️induce action potentials
what do mechanically gated channels do? - ✔️✔️converts mechanical stimulus into electrical signal
what do somatosensory neurons do? - ✔️✔️bring information to the CNS
do sensory neurons need to be activated by specific stimuli? - ✔️✔️yes, sensory neurons are activated by
stimuli that fall within a specific physical area
where is visceral sensory info integrated? - ✔️✔️in the brainstem and spinal cord
where is almost all special and somatic sensory information routed? - ✔️✔️through the thalamus
true or false. special sense have dedicated cortical regions. - ✔️✔️true
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