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45 Cards in this Set
- Front
- Back
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Generator Potential |
change in membrane potential (depolarization) of a special receptor cell.
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Somatic Senses |
touch, pressure, vibration and temperature
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mechanoreceptors
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Meissner corpuscles
Pacinian corpuscles Naked Nerve Endings |
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Meissner Corpuscles |
Receptors for Touch |
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Pacinian Corpuscles |
Receptors for pressure |
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Naked Nerve Endings |
Pain receptors |
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Krause End Bulb |
Senses Cold |
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Ruffini Corpuscles |
Sense Heat |
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Thermoreceptors |
Krause End Bulbs and Ruffini Corpuscles |
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Nociceptors |
Pain receptors |
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Muscle Spindles and Golgi Tendon Organs |
special nerve endings responsible for transmitting impulses for muscle sense
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muscle spindles
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Stimulates muscles to contract and relax |
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function of Golgi tendon organs
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fires an impulse to prevent muscles from becoming overstretched |
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phasic receptors
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adapt quickly and stop producing action potential
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tonic receptors
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don't adapt quickly or not at all
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tongue papillae
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Fungiform and Vallate |
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three auditory bones located in the middle ear
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malleus, incus and stapes |
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function of these bones in middle ear
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transmitting the sound energy from external ear to the inner ear
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he structure, that brings the air in the middle ear from pharynx
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eustachian tube
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function of cochlear part of the inner ear
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hearing |
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function of vestibular part of the inner ear
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balance |
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Semicircular canals
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part of the vestibule is responsible for sensing the angular acceleration.
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Utricle and saccule
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responsible for maintaining static equilibrium of head against gravity
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How does the semicircular canals help in sensing the rate of change of head rotation?
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hair cells detect movement of fluid |
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Otoliths |
crystals that help depolarizing the special hair cells in saccules and utricles
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Organ of Corti
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part of the cochlea contains receptor hair cells and sensitive to the sound waves
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Conduction Deafness |
Deafness due to problem in ear bones or diseases that obliterate the external ear canal.
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Nerve Deafness |
Deafness involving an abnormality in the receptor organ itself or degeneration or trauma of nerve.
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Name the three tunics (layers) of the eyes
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Fibrous, Vascular and Nervous |
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What is other name of the vascular layer of eye?
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Uvea |
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Accommodation
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mechanism of focusing of the lens
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Action of the the ciliary muscles help focusing the lens on a distant object
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Relaxation |
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Cction of the ciliary muscles help focusing the lens on a close object
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Contraction |
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fluid produced by the ciliary bodies
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Aqueous Humor |
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The chamber containing Aqueous Humor |
Posterior Chamber |
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Receptor cells in retina
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Rods and Cones |
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Why the optic disc area in retina is called blind spot
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It contains no photoreceptor cells |
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Rhodopsin
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Photochemical, that is found in rod cells
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Rhodopsin is made up of what two components?
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Scotopsin (protein part) and Cis-retinine (pigment part)
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What changes occur in cis-retinine in rod cells, when the light strikes the retina?
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the Cis-retinine part is converted into the All-trans-retinine
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Vitamin A
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vitamin, that is needed for production of cis-retinine in rod cells
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Epiphora |
overflowing of tears from the edge of eyelids
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Meibomian glands and Zeis glands
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glands associated with eyelids and eyelashes
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Cherry Eye |
Prolapse of the third eyelid |
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Name the three layers of tear film
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Oily Layer, Aqueous Layer and Mucus Layer |
