Sense Organs Flashcards
What are the 5 general senses
-visceral sensation
-touch
-temperature
-pain
-proprioception
What are the 5 special senses
Taste
Smell
Hearing
Equilibrium
Vision
What is sensed? What type of stimulus?
Visceral sensations
Fullness, hunger, thirst
Chemical, mechanical
What is sensed? What type of stimulus?
Touch
Touch and pressure
Mechanical
What is sensed? What type of stimulus?
Temperature
Heat and cold
Thermal
What is sensed? What type of stimulus?
Pain
Intense stimuli
Mechanical, chemical, or thermal
What is sensed? What type of stimulus?
Proprioception
Body position and movement
Mechanical
What is sensed? What type of stimulus?
Taste
Taste
Chemical
What is sensed? What type of stimulus?
Smell
Odor
Chemical
What is sensed? What type of stimulus?
Hearing
Sounds
Mechanical
What is sensed? What type of stimulus?
Equilibrium
Balance and head position
Mechanical
What is sensed? What type of stimulus?
Vision
Light
Electromagnetic
Central temperature receptors keep track of the core temperature and are located
In the hypothalamus
Pain receptors =
Nociceptors
The first step of nociception, conversion of stimulus into nerve impulse
Transduction
The second step of nociception, nerve impulses move up the sensory nerve fibers to the spinal cord
Transmission
Third step of nociception, changing of the sensory nerve impulses which can influence the information the brain receives, where that is to amplify or suppress an impulse
Modulation
The last step of nociception, happens in the brain when it is conscious of the impulse
Perception
The sense of body position and movement
Proprioception
Sense of taste =
Gustatory sense
Sense of smell =
Olfactory
Part of the ear that acts as a funnel to collect sound wave vibrations and direct the to the eardrum
External ear
Most of the ear structures are housed within the __ bones of the skull
Temporal
Part of the ear that amplifies and transmits the vibrations
Middle ear
Part of the ear that contains the senseory receptors that convert mechanical vibrations to nerve impulses
Inner ear
Where is the pinna located ?
Out part of the ear
Soft membrane lined tube that is L shaped and Carries sounds waves to the tympanic membrane (eardrum)
External auditory canal
Eardrum =
Tympanic membrane
Receptors for hearing are located in the ___. Is snail shaped
Cochlea
The outmost bone of the ear that is attached to the tympanic membrane
Malleus
The middle bone of the ear that forms a synovial joint with malleus
Incus
Medial most bone of the ear
Stapes
CLINICAL APPLICATION
When an animal shakes it’s head vigorously what can can happen to the pinna of the ear
An ear hematoma
The structure that lines the back of the eyeball
Retina
What is the role of the fibrous layer of the eye
Admits light and gives strength and shape
What is the role of the vascular layer of the eye
Responsible for pigment
What is the Role of the inner nervous layer of the eye
Consists of the retina, it is an image sensor in the camera of the eye. (Contains sensory receptors such as rods and cones)
A brightly colored mirror, responsible for the bright light that seems to shine from an animals eyes in the dark (aids in low light vision for animals)
Tapetum lucidum
The transparent window that admits light into the interior of the eye.
Cornea
The opening at the center of the eye
Pupil
The colored part of the eye
Iris
Cones are responsible for what
Color
Rods are responsible for
Shades of gray and course images
CLINICAL APPLICATION
An abnormal condition of the eye where the lens becomes opaque is called what
Cataracts
CLINICAL APPLICATION
a group of diseases characterized by increased intraocular pressure that causes pain and can lead to blindness.
Glaucoma
A thin transparent me membrane that covers the front portion of the eyes
Bulbar Conjunctiva
A thin transparent membrane that lines the interior portion of the eyelids
Palpebral conjunctiva
Along the margin of each eyelid are tiny openings that produce a waxy substance that helps prevent tears from overflowing onto the face called
Tarsal glands or meibomian glands
Includes structures that produce and secrete tears and the structures that drain them away from the surface of the eye.
Lacrimal apparatus
The receptor organ for hearing is
The organ of corti
What part of tears come from lacrimal glands and where are they located
The blind spot of the eye
Optic disc
The outer fibrous layer of the eye
Scelera
