Chapter 13 Flashcards
Name the 5 types of sensory receptors
chemoreceptors nocicereceptros thermoreceptors mechanoreceptors photoreceptors
Each type of receptor is most sensitive to a distinct type of ____
stimulus
What are sensations?
sensations are feelings resulting from sensory stimulation
General senses are associated with receptors found where? (4)
skin
muscles
joints
viscera
List the 4 general senses
touch
pressure
temperature
pain
List the 5 special senses
smell taste hearing equilibrium sight
Where are special sense receptors found?
large complex sensory organs of the head
Olfactory organs consist of receptors and supporting cells and can be found in which cavity?
the nasal cavity
Taste receptors consist of taste cells + supporting cells, what can they detect?
sweetness sourness saltiness biterness umami
Which two parts of the ear work together to receive vibrations which are perceived as sounds
outer, inner and middle ear
Describe the outer ear
-consists of auricle, external acoustic meatus + ear drum (tympanic membrane)
Describe the middle ear
-contains auditory ossicles and is connected to the throat
Describe the inner ear
is important to establish the sense of equilibrium
- contains chambers + tubes that form its bony labyrinth which lies above a membranous labyrinth
- semicircular canals aid equilibrium, cochlea air hearing
What is static equilibrium?
the position of the head is sensed while head and body are still
The sense of equilibrium consists of ____ + ____ equilibrium
static and dynamic equilibrium
What is dynamic equilibrium?
motion is detected when head and body move or rotate, aiding in balance
What is the dominant sense?
sight
Discuss the 3 layers of the eye
- outer layer, transparent cornea, fibrous + anterior bulging forwards
- cornea and lens of each eye refract light waves to focus an image on the retina, which transmits visual perceptions to the brain
Describe the outer layer of the eye
mostly made up of white colored sclera
Describe the middle layer of the eye
called the uvea
vascular and includes the choroid coat, ciliary body + iris
lens is held in place by suspensory ligaments behind the iris and pupil
Describe the inner layer of the eye
Nervous layer
consists of the retina + its millions of photoreceptors
when light waves bend to focus, the phenomenon is called refraction
photoreceptors known as rods provide vision in dim light without color
other photoreceptors called cones provide colour vision
