Sensory physiology Flashcards
chemoreceptors detect
chemicals
What are olfactory epithelium receptors
detects smell in the nose
what are the jobs of receptors of the aortic and carotid bodies
to detect oxygen levels in the arterial blood
What are the jobs of neurons near or in supraoptic nuclei
osmolality of body fluids
What are the receptors in or on the surface of the medulla responsible for
CO2 concentration detection
What are the receptors in the hypothalamus responsible for
blood glucose, amino acids and fatty acid concentrations
thermoreceptors
detect change in temperature
nocicceptors
pain receptors (free nerve endings) detect physical and chemical damage to tissues
Electromagnetic receptors
detect light on the retina of the eye (vision with rods and cones)
Nerve fibers only transmit_______ not _______
the sensation you feel is determined by __________
impulses not modalities
determined by the point the NS to which the nerve fiber leads
The labeled line principle
the specificity of nerve fibers are only meant for transmitting one modality of sensation! (Ex: pain fibers are only for pain)
Stimuli cause nerve impulses cause receptor potential cause action potential cause excitation of neurons
hmmm okay
pacinian corpuscle
sensory sites for deep pressure and vibration found mostly on hands and feet
What are the types of receptors that adapt and react very quickly and react strongly WHILE a change is taking place (called rate or phasic receptors)
pacinian and hair receptors (within a second)
what receptors work slower and are TONIC receptors that keep brain constantly aware of surroundings.
joint capsules and muscle spindles take long but idk how long
carotid and aortic baroreceptors may take 2 days
some chemoreceptors and pain receptors may never adapt completely
