Quiz 3 Flashcards
Purpose and general function of a sensory receptor
Detects changes in the environment, and converts these changes into APs
Physical Reality
The state of things as they actually exist
Perception
How we interpret our environment through our senses
Tonic receptor response patterns
-slow adapting receptors.
respond to the stimulus as long as it persists
Phasic receptor response patterns
rapidly adapting receptors, respond quickly to stimuli but stop responding upon continuous stimulation
Input of chemoreceptors
Chemicals
Input of Photoreceptors
Light
Input of Thermoreceptors
Temperature
Input of Mechanoreceptors
Touch, pressure, vibration, and sound
Input of Nocioreceptors
Pain
Input of Osmoreceptors
Changes in water concentration
Input of Proprioreceptors
Position
Input of Cutaneous Receptors
Touch, pressure, vibration, temperature, and nociception (pain)
Sound
The reception of sound waves and their perception by the brain
The characteristics of sound
Wavelength (measured in m) , Amplitude (dB), Frequency(Hz), Time Period, Velocity
Frequency
Known as pitch, The number sound pressure waves per second
Amplitude
The relative strength of sound waves, which we perceive as loudness or volume
Function and importance of the Pinna
acts as a kind of funnel which assists in directing sound further into the ear
Function and importance of the external auditory meatus
Conducts sound to the eardrum and middle ear
Function and importance of the tympanic membrane
Transmits sound vibrations to auditory ossicles and oval window
Function and importance of the ossicles (malleus, incus, and stapes)
Transmit vibrations to the inner ear and help amplify sound
Function and importance of the cochlea
Contains hearing receptors, detects low frequency sounds
Function and importance of the organ of Corti
Transforms vibration into a nerve impulse that can be interpreted by the brain
Function and importance of hair cells
Produces nerve impulses that are sent to the brain via the cochlear nerve
Function and importance of the vestibulocochlear cranial nerve
(In hearing)
It brings in sound via the cochlear nerve to the brain
What is the physiology of sound transduction?
SW’s enter —> TM vibrates—-> Perilymph in BL and endolymph in ML move —– BM vibrates —–> Hair cells in OOfC are stimulated to transmit n. impulse via cochlear n. —–> N. Impulses are sent to the brain
