Senses- smell, touch taste Flashcards
Smell (21 cards)
Where are the receptors in our nose found?
How do we smell?
Upper portion of out nasal cavity
Odorant molecules bind to specific receptors in the nasal cavity and send a signal to the brain
What type of cells line the upper portion of the nasal cavity?
What is the area in the brain called that receives the message regarding smell?
Olfactory receptor cells
olfactory cortex
Sense of Touch
Ø
The receptors for the sense of touch are in
We can use any part of our bodies to feel the sense
of touch –some body parts are more sensitive than
others
our skin
Ø
Which areas are more sensitive to touch
what are the receptor cells in the skin
what layers are in the skin
mouth, fingertips,
nerve endings that are connected into a major nerve
Epidermis- epithelium- protects
Dermis- receptor cells
How else can dermis be subdivided?
What does this bottom layer of dermis contain?
Dermis and hypodermis
fatty tissue to protect and keep you warm
Receptor cells in the Epidermis, and the top of the dermis, allow us to feel
Receptor cells in the hypodermis, allow us to feel
light pressure
strong pressure
Heat
light pressure
pain
cold
hair movement
What does the sebaceous gland do
secretes oil to the hair to stop it from getting brittle
protects and lubricates
Sense of Taste
Ø
The receptors for the sense of taste are located
on the surface of our tongue
What are papilla?
What are inside the papilla
Structures found on the surface of the tongue
receptor cells responsible for tasting
How many types of papilla are there
What are they called
4
Filiform papilla
Fungiform papilla
Vallate papilla
Foliate papilla
Papilla that contain taste buds (3)
Which papilla are found on the tip of the tongue?
Which papilla are found on the side of the tongue?
Which papilla are found at the back of the tongue?
Fungiform papilla
Foliate Papilla
(not in adults, other animals have them)
Vallate papilla
What are filiform papilla
Will they be as prominent in humans?
for grooming
not for tasting
no taste buds
cover the whole of the tongue
pointy looking
no
Cat are very obvious
What are red dots on your tongue, front?
What is the white filament on the tongue
fungiform papilla
filiform- for protection
What are the tastebuds
What are the name of the receptor cells in the tongue
they are organized receptor cells for taste
Gustatory cells are receptor cells and are connected to the nerve
Receptor cells live for
(lifespan)
Renewal of cell becomes slower
only 1 to 2 weeks and then are
replaced by new receptor cells.
as you age
burnt tongue
Each receptor in a taste bud responds best to one of
the basic tastes.
sweet
sour
salty
Bitter
Umami
What is umami
Umami is the response to salts of glutamic acid
Ex: monosodium glutamate
(MSG)
Two cranial nerves that innervate the tongue and are used
for taste:
FACIAL NERVE 7
GLOSSOPHARYLNGE NERVE glossopharyngeal nerve 9
(IX) –posterior (back) 1/3
Another cranial nerve that carries taste information from the back part of the mouth in the pharynx
What other things does it detect?
VAGUS NERVE 10
Used for heart rate, peristalsis, sweating, gag reflex, etc
What cranial nerve innervates the tongue, but is used for pressure
temperature and pain
trigeminal nerve 5
What is ageusia
What is anosmia
The complete inability to taste is called
The complete inability to smell
