Special Senses Flashcards
Which glands produce tears to keep the conjunctiva moist and clean?
Lacrimal glands
What is conjunctivitis?
Inflammation of the conjunctiva due to infection or physical abrasion
In what conditions do rod cells work?
In dim light, they see in black and white
In what conditions do cone cells work?
In lighter conditions, they see colour
Rods and cones synapse with sensory cells to form which nerve?
The optic nerve
What are the 3 tunics of the eyeball?
Fibrous, vascular and neural
What is the fibrous tunic of the eyeball and what is its function?
Made of the sclera and cornea, provides protection for the eye and attachments for muscles
What is the ciliary body of the vascular tunic of the eyeball for?
Contains suspensory ligaments that hold the lens
The vascular tunic of the eyeball contains blood vessels and smooth muscle and is made up from…
Iris, ciliary body and choroid
What is the choroid of the vascular tunic of the eyeball for?
Contains the capillary network
Which tunic of the eyeball contains the rod and cone cells?
The neural tunic (retina)
Over accumulation of glucose due to poor control of diabetes can…
Damage the retinal vessels leading to oedema and swelling of the macula to cause blurred vision.
What is glaucoma?
A form of blindness where the intraocular pressure is increased due to build up aqueous humour in the anterior cavity
The two optic nerves meet to connect at the…
Optic chiasma
Where is the visual cortex located?
In the occipital lobe
Ears are divided into 3 parts
External, middle and inner ar
What is the role of the auricle of the external ear?
Collects soundwaves
What is the role of the tympanic membrane of the external ear?
Separates the external and middle ears. It vibrates when sound waves hit it
The middle ear has 3 ear bones that…
Transmit vibrations from the tympanic membrane to the oval window
How is the middle ear connected to the nasopharynx?
By the auditory tube (Eustachian tube)
What part of the inner ear is concerned with hearing?
The cochlear
What parts of the inner ear are concerned with balance?
The vestibule and the semicircular canals
Which nerve transmits information from the inner ear to the brain?
Vestibulocochlear
Where is the primary auditory cortex located?
In the temporal lobe
