moduel 5.2 Flashcards
(24 cards)
define frequency
how high or low a sound is; pitch (Hz)
define intensity
loudness (dB); measured wave by amplitude
what are the three smallest bones in the body? where is it located? what do they do? which bone is connected to the oval window
malleus, incus, stapes. The ossicle. amplify vibration. the stapes
where are your auditory hairs located
the basilar membrane, which is inside the cochlea
what is transduction
external sensation —> neural firing in brain
We hear a specific pitch because cells at a specific place on the basilar membrane fire. For example it is believed that lower frequency sound excites cells deeper in cochlea. What theory is this?
place theory
the basilar membrane vibrates in different places depending on the pitch of the sound you hear. what does frequency theory state
understand pitch b/c of rate of firing in basilar membrane
what does the somatosensory cortex process?
touch and motion
the mechanoreceptors are receptors in the skin that tell us where to move. T/F
F. receptors in skin that sense different kinds of pressure
define Merkel receptor
fires continuously as long as skin is in contact with an object
Meisner corpuscle
respond to pressure applied then removed
Ruffini cylinder
Interpreting stretching of skin
Pacinian corpuscle
feels vibration and texture
Rank body parts in order of somatotopic organization of highest to lowest
Hand
hip
eye
tongue
shoulder
tongue
eye
Hand
shoulder
hip
Where is the Merkel Receptor located, and what does it do?
a
It is located deeper in the skin and senses vibrations.
b
It is located close to the surface of the skin and fires when pressure is first applied and when it is removed.
c
It is located deeper in the skin and sends messages about the stretching of the skin.
d
It is located close to the surface of the skin and fires continuously while the skin is in contact with an object.
d
It is located close to the surface of the skin and fires continuously while the skin is in contact with an object.
(Merkel is a pervert)
we sense temperature change through our
photoreceptors
pharorecpetor
thermoreceptors
thermoreceptors
what is the kinesthetic sense
where our bodies are in space and how to move our bodies to accomplish tasks
define vestibular sense
sense of balance
what doe the semicircular canals sense
change in acceleration and rotation
which cell responds to force of gravity
hair cells
which structure in the inner ear responds to cues about balance and posture
vestibular sacs
what is the absolute threshold
level of intensity required to create a conscious experience.
some people have a more liberal response bias when it comes to stimulus what does this mean?
they have high “hit rate” so they are more likely to say stimulus is present even if non was presented
some people have a more conservative response bias when it comes to stimulus what does this mean?
These people tend to have a higher miss rate. That is, they tend to say they did not perceive a stimulus even when one was presented, but they also have a higher correct rejection rate, so they are more likely to say there was no stimulus when no stimulus was presented
