LC 4-16 Flashcards
Receptors found in skin, joints, muscles; sense of touch/movement.
Somatic receptors
Receptors found in walls of organs; organ status
Visceral receptors
Receptors for Gustation, olfaction, vision, hearing, equilibrium
Special sense receptors
Receptors that Detect stimuli from external environment; found in skin, special senses, some membranes
Exteroceptors
Receptors that Detect stimuli in internal organs; found in smooth muscle
Introceptors
Receptors that Detect body and limb movements; found in muscles and joints
Proprioceptors
Receptors that detect Chemicals dissolved in fluid; flavors in saliva, blood, oxygen
Chemoreceptors
Receptors for Changes in temperature
Thermoreceptors
Receptors for Changes in light, color, movement
Photorecptors
Receptors for Touch, pressure, vibration
Mechanoreceptors
Receptors for Stretch or expansion in vessels and organs
Baroreceptors
Receptors for Pain/tissue damage
Nocioceptors
Cells that detect tastes; taste-producing molecules and ions in our food
Gustatory cells
Change in environment, detected by receptor
stimulus
Change in environment, consciously aware of it
sensation
Term for sense of taste
gustation
Term for sense of smell
olfaction
Type of sense that includes all senses other than special
general
Type of senses that include vision, hearing, smelling, tasting, equilibrium
special
Sense term that describes change in body’s internal environment, things that you can’t reach with a finger
Interoreception
Sense term that describes change in external environment, things you can reach with a finger
Exteroreception
Sense term that describes body position and equilibrium
Proprioception
Receptors that detect chemicals, eg nose, tongue, blood vessels
Chemoreceptors
Receptors that detect temperature, eg skin
Thermoreceptors
Receptors that detect light, eg only in eye
Photoreceptors
Receptors that detect touch, vibration, stretch, eg cutaneous, ear
Mechanoreceptors
Receptors that detect pressure, eg vessel and organ walls
Baroreceptors
Receptors that detect pain, eg skin, muscles
Nocioceptors
Detect pain in skin
Free nerve endings
Detect hair movement
Root hair plexuses
Detects deep touch
Lamellated corpuscles
Detects light touch
Tactile corpuscles
Something you can smell
oderant
Chemical in body that can detect oderant in body and will send signal to brain
Oderant-binding protein
Smell is important for _______
memory
Sense of taste
gustation
Bumps on the tongue that may contain taste buds
papillae
Papillae with no taste buds, have mechanoreceptors, for texture
Filiform papillae
Papillae that have taste buds, but not many
Fungiform papillae
Papillae that have taste buds, most taste buds
Vallate papillae
Papillae that are not well developed in humans
Foliate papillae
Describe how taste buds work
(1) tastant dissolves, (2) goes into papillae, (3) chemoreceptors in papillae detect, (4) sent to facial (VII) and glossopharangeal (IX) nerves
Term for chemical we can taste
tastant
Five types of taste
sweet, salt, sour, bitter, umami
Taste produced by organic compounds, eg sugar
sweet
Taste produced by metal ions, eg Na+ and K+
salt
Taste associated with acids
sour
Taste produced by alkaloids
bitter
Taste related to amino acids
umami
Good portion of taste goes where in brain
medulla oblongata
Visual receptors that detect light
photoreceptors
Two main types of photoreceptors
rods and cones
Receptor that detects volume, amount of light
rods
Receptors that detect color, wavelength, frequency, primarily located in the fovea centralis
cones
Three types of cones
red, blue, green
Describe relationship of cones and rods in seeing light
rods overlap in frequencies of light they detect, rods are between blue and green
Protein in photopigments
opsin
Light-absorbing molecule in photopigments
retinal
Two types of photopigments
rhodopsin, photopsin
Opsin in rods
rhodopsin
Opsin in cone cells
photopsin
Focusing involves two steps
refraction, accommodation
Bending light, eg light passing through material
refraction
Term referring to body changing shape of lens to adjust for distance
accommodation
Accommodation for distant vision
lens more long and thin, suspensory ligaments taut, ciliary muscles relaxed
Accommodation for near vision
lens more thick and spherical, suspensory ligaments relaxed, ciliary muscles contract
Normal vision
emmetropia
Far-sighted
hypertropia
Near-sightedness
myopia
Unequal focusing due to curvatures in one or more refractive surfaces
astigmatism
Age-related vision decrease
presbyopia
Lens needed to corrected hyperopia
convex
Lens needed to correct myopia
concave lens
Clearness of vision, measures on the 20/20 scale
Visual acuity
Describe visual acuity measurement
higher second number, worse vision; lower second number, better vision, 20/20 is normal
Pathway of light, neural pathway
Photopigments in photoreceptors stimulated > depolarizes bipolar cell > AP in ganglion cell > optic nerves > optic tract > occipital lobe
Optic tracts carry info to brain areas where
superior colliculi
Overlapping vision which creates depth perception
stereoscopic vision
Auditory path of sound
Pinna > external auditory meatus > tympanic membrane > malleus > incus > stapes > oval window > vestibular duct > vestibular membrane > cochlear duct > tectorial membrane > hair cells of organ of corti
Neural path of sound
hair cells of spiral organ of corti > cochlear branch of vestibulocochlear nerve > vestibulocochlear nerve > cochlear nucleus > inferior colliculi > thalamus > temporal lobe
Structure that vibrates out any excess pressure waves
round window
Wavelength of sound determines what in relationship to cochlea
determines where in cochlea sound is detected
Measurement for frequency of sound
hertz
Measurement for amplitude, sound intensity
decibels
Awareness and monitoring of head position, coming from vestibule
equilibrium
Structures that detect linear acceleration
saccule, utricle
Angular/rotational acceleration
semicircular ducts
Gel layer on top of hair cells in vestibule
otolithic membrane
Gel cap on top of hair cells in semicircular ducts
cupula
Calcium carbonate crystal that add mass to gel in _______ membrane
otoliths
Linear and angular acceleration is detected by what
hair cells in the vestibule
Pathway of linear acceleration
hair cells of vestibule > vestibular branch of vestibulocochlear nerve > vestibulocochlear nerve > vestibular nucleus > cerebellum and thalamus > cerebral cortex