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59 Cards in this Set
- Front
- Back
Sensory Receptors do what?
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They detect changes in the enviroment and stimulate neurons to send nerve impulses to the brain
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What are the 5 main types of receptors?
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Chemoreceptor, pain receptors, theromoreceptors, mechanoreceptors and photoreceptors
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Chemoreceptors do what?
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they are sensitive to change in a chemical condition
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Pain receptors do what
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They detect tissue damage
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thermoreceptors
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change in temperature
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mechanoreceptors
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change in pressure or movement
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photoreceptors
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change in light vision
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What is a sensation?
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It is a feeling that occurs when the brain interprets sensory impulses.
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When sensory impulses are sent at decreasing rates until the receptors fail to send impulses?
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This is know as adaption if there is a change in strength of the stimulus then the impulse will be resent
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Olfactory organs means what?
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Smell organs
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What type of the receptors are the olfactory receptors?
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Chemoreceptors
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Where are chemoreceptors located
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in the upper nasal cavity
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What are the organs of taste?
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The taste buds
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Taste buds are located within bumps called?
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papillae
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Where are papillae scattered?
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Through out the mouth and the pharynx.
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The ear is made up of what?
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The external, middle and the inner
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What does the ear do?
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provides us with hearing and equilibruium
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The outer ear consist of the what?
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auricle/ or pinna
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What does the auricle or pinna do?
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it collects sound
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Once the sound is collected it travels down the what?
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External auditory meatus.
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Once the sound travels down the External auditory meatus where does it go?
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toward the middle ear
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The middle ear begins with the eardrum called the?
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tympanic membrane
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The eardrum is an air filled space or a?
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tympanic cavity
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The eardrums typanic cavity houses the tiny bones called the ?
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auditory ossicles
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What are the name of the three bones that the middle ear contains?
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malleus, incus and the stapes
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What opening does the last of the three bones push against?
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oval window
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The inner ear is made up of what?
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a membranous labyrinth inside and a osseous(inner)labyrinth
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What is the fluid that is between the two labyrinths?
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perilymph
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what is the fluid in side the inner labyrinth called?
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endolymph
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Path of vibration: What funnels the sound as air waves into the external auditory?
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The oricle
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Path of Vibration: What channels the air waves into the eardrum.
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the tympanic membrane
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Path of Vibration: The tympanic membrane vibrates converting the impulses into?
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Mechanical waves.
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Path of vibration:What moves the three auditory ossicles which are in order?
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The mechanical waves
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What are the three auditory ossicles?
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Malleus incus stapes
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Path of vibration: Moving the three auditory ossicles will amplify the sound. What is the last one?
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The stapes
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Path of vibration: What last auditory ossicle pushes on the oval window?
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the stapes
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The sense of equilibrium consist of two parts what are they?
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Static and dynamic
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What are the accesory organs of Vision?
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The eyelids
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What is the thin smooth muscle that adjusts the amount of light entering the pupil?
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The iris
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The hole in the center of the iris is the?
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pupil
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What are the two kinds of modified neurons of the visual receptors?
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The rods and the cones.
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What modified neuron is elongated and responsible for black and white vision?
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The rods
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What modified neuron is blunt shaped and responsible for color vision?
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the cones
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Somatic senses are associated with what?
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receptors in the skin muscles joints and the viscera
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Somatic senses include the senses of
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touch and pressure temperature and pain
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The sense fo touch and pressure are derived from 3 kinds of receptors?
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sense mechanical forces and deformor displaced tissue
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Whjat sensory nerve fibers in the epithelial tissues are associated wiht touch and prressure?
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Free endings
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What are Meissner's corpuscles?
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oval masses of connective tissue that surround 2 or more nerve fibers they are abundant on hairless parts
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What are pacinian corpuscles?
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connective tissue fibers and cells -in the deeper tissues and muscle tendons and joints ligaments- responds to heavy pressure
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Some free nerve endings are
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heat receptors, cold receptors and pain receptors both heat and cold adapt quickly pain adapts slowly
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Deficiency of oxygen can trigger what receptor?
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pain
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what pain may fell like it is coming from another part of the body?
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visceral
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Nerve fibers that conduct impulses away from pain receptors are?
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Acute pain fibers and chronic pain fibers
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What determines the intensity of the the pain?
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The cerebral cortex
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What makes one aware of pain?
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the thalamus
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Window of the eye that helps focus entering light rays is the?
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cornea
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The white portion of the eye?
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sclera
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The iris seperates the anterior from the
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posterior
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What depresson in the center of the retina produce the sharpest vision?
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The fovea
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