The Eye
Opening in the eye that changes size to allow varying amounts of light to enter.
Pupil
Allow us to see color.
Cones
It is the first part of the ear that reacts with sound. The function of this structure is to act as a kind of funnel which assists in directing the sound further into the ear.
The auricle (pinna)
Hardening of the lens leading to blindness.
Cataracts
Why do we have blind spots?
There is an opening in the retina for our optic nerve and thus no photoreceptors at this area.
Produces our tears.
Lacrimal Gland
Allow us to see in low levels of light and/or grays.
Rods
The three smallest bones in our body.
Ossicles (Malleus, Incus, and Stapes)
Increased pain and pressure as a result of blocked ducts which lead to less drainage of the aqueous humor.
Glaucoma
Equilibrium that tells us our stationary position.
Static equilibrium
The whites of our eyes or the outermost fibrous protective tunic.
Sclera
Focuses light on the retina in order for vision.
Lens
What is the purpose of the Vestibular apparatus (sometimes also known as the three semicircular canals)?
Controls our equilibrium/ balance (both types)
Deafness caused by a physical interference with the vibrations.
Conduction Hearing Loss
Equilibrium that deals with angular movement.
Dynamic Equilibrium
The refracting power of this changes for close rays of light.
The lens
Reflex that constricts (shrinks) the pupil for bright light.
Photopupillary reflex
What is the purpose of the cochlea and Organ of Corti?
Organ that contains hair cells (stereo-cilia) or receptors for hearing.
Progressive deafness of unknown cause that may have the following symptoms: motion sickness, tinnitus, and vertigo
Meniere’s Syndrome
Explain how your sense of smell works
1. Your nose (nasal cavity) is lined with odor sensing cells.
2. Chemicals around you bind with these receptor cells that send signals to your olfactory nerve. The olfactory nerve then sends the information to the olfactory bulbs in the brain as well as the thalmus which is interpreted as taste/smell.
Prevents the eyeball from collapsing inward.
Vitreous Humor
If this reflex were inhibited, you would have trouble seeing close objects.
Accommodation reflex of the pupil
Why don't hearing aids help with sensory-neural deafness?
The nervous system is damaged so increasing vibrations does not help the hearing deficit.
Reason why children are more likely to have otitis meida?
Why does feeding a baby tilted too horizontally (laying back) increase this risk?
Children have immature immune systems and their auditory tubes are shorter and straighter.
2. When Children are held more horizontally, this allows the formula to drain into the tympanic cavity, breeding bacteria.
Cells that respond to chemicals allowing for taste.
Taste buds (gustatory cells)