Sensory Flashcards
(24 cards)
Types of Receptors
Mechanoreceptors
Chemoreceptors
Thermoreceptors
Photoreceptors
Nociceptors (Pain Receptors)
Unencapsulated
Nerve Endings
skin, bones, internal organs, joints
pain, light touch, and temperature
Free Nerve Endings - Pain & Temperature
Merkel’s Discs - Light Touch & Pressure
Root Hair Plexuses - Light Touch
Encapsulated Nerve
Endings
Deeper tissue, muscles
Pacinian Corpuscles - Deep Pressure
Meissner’s Corpuscles - Discriminative Touch in Hairless Skin Areas
Krause’s End-Bulbs - Discriminative Touch in Mucous Membranes
Ruffini’s Corpuscles - Deep Pressure & Stretch (Proprioception)
Somatic Pain
Pain-results from injuries to skin, muscle, joints, tendon vs
Visceral Pain
pain in body organs
The Special Senses
Taste
Smell
Vision
Hearing
Balance
the eye
The eyes refract
(bend) and focus the incoming light waves onto the sensitive
photoreceptors (rods and cones) at the back of each
eye
the ear
the ear consists of the three principal regions: the outer ear, the middle ear, and the inner ear
Outer ear
The outer ear consists
of the auricle and the external auditory canal
The middle
ear
The middle
ear contains the auditory ossicles (malleus, incus, and stapes).
The inner ear
The inner ear contains the spiral organ (organ of Corti) in
the cochlea for hearing, and the semicircular canals and the
vestibular organs for equilibrium.
The tympanic skin
The tympanic skin splits the exterior ear from the middle ear (eardrum).
Eustachian tube
hannel that connects the back of the nose with the middle ear.
Cochlea
holds the nerves for hearing.
Semicircular canals and Vestibule
This holds receptors for balance.
Which part of the ear converts sound waves into vibrations?
Middle ear
Which bones are the most delicate bones in your body called
ssicles. These bones, malleus, incus and stapes are the smallest bones in the body that sit in the middle ear between
Which tiny bone is attached to the eardrum
Malleus (hammer)
Fluid moving in the_____causes you to feel dizzy after you stop spinning.
Semicircular canals
the fluid looped around in a semi-circular canal is positioned at different angles. When you move your head the fluid inside these tubes stays still, just like tea inside a cup stays still when the cup is rotated.
What part of your ear allows the ‘popping’ that happens when you fly?
Popping in your ears is when the pressure inside the middle ear is balanced with the pressure outside it, which frequently gives great relief and advances hearing. The Eustachian tube connects the middle ear to the back of your nose and it allows for drainage of fluid and for pressure to be released.
cochlea
a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses
semicircular canals
three canals within the inner ear that sit in different planes. They contain specialized receptor cells that sense rotations of the head in each plane.
The brain perceives signals coming from different neurons in the cochlea as different
Pitches
oval window
The membrane that marks the boundary between the middle and inner ears. this receives vibrations from the auditory ossicles.
