touch receptors, proprioceptors, visceral senses (sense of organs), special senses (smell, taste, vision, hearing, equilibrium)
2
New cards
How is smell sensed
by the olfactory nerve (first cranial nerve) and olfactory bulb; a chemical sensation
3
New cards
How is taste sensed
by taste buds on papilla (hill-like projections on the tongue); a chemical sensation, can regenerate, can also pick up texture and temperature
4
New cards
What structures protect the eye
the orbit, eyebrows, eyelashes, eyelids, and the conjunctiva
5
New cards
What glands are associated with the eye
the lacrimal gland, lacrimal caruncle, and the tarsal gland
6
New cards
What is the lacrimal gland, what does it do and where is it located
produces tears in the upper outer corner; tears drain down the nasal lacrimal duct; used to moisten and protect from infection (lysozyme: destroys bacteria)
7
New cards
What is the lacrimal caruncle, what does it do and where is it located
produces an oily substance in the medial corner of the eye; lubricates the eye and keeps tears in
8
New cards
What are tarsal glands, what does it do and where is it located
produces an oily substance inside of the eyelids; lubricates the eye and keeps tears in
9
New cards
What is the anatomy of the eye
Conjunctiva: specialized epithelium (lots of goblet cells), areolar ct (lots of bvs); fibrous tunic: sclera (white of eye) - desnse irregular ct, protect the eye, cornea (clear) - main focuser (light); vascular tunic: choroid - supply nutrients to the retina, ciliary body - smooth muscle, iris - smooth muscles, controls size of pupil, lens, suspensory ligaments - holds lens; neural tunic: retina - macula - the most focused part of the eye
10
New cards
What is conjunctivitis
inflammation of the conjunctiva (pink eye)
11
New cards
What is astigmatism
a blurry spot in the eye; treatment: lasik
12
New cards
What is gluacoma
too much aqueous humor, which increases pressure in the eye and destroys the bv layer; can lead to blindness due to lack of blood
13
New cards
What is the anterior cavity
filled with aqueous humor (fluid), nourish the cornea; ends at the lens
14
New cards
What is the posterior cavity
filled with vitreous humor (gel-like), maintain shape of the eye; starts at the lens
15
New cards
What does the ciliary body do when it’s focused on an object NEAR
it contracts and the lens become round
16
New cards
What does the ciliary body do when it’s focused on an object thats FAR
the ciliary body relaxes and the lens become elongated
17
New cards
What is presbyopia
unable to focus on close objects because the lens can’t snap back as they used to; cause: age (loss of elastin)
18
New cards
What is the anatomy of the retina
choroid, pigmented layer - absorb excess light; photoreceptor layer: rods (black and white) - work in dim light, less clear, cones (color) - work in bright light, more clear; nervous layer - neurons; blood vessel layer, optic nerve
19
New cards
What is cataract
lens get cloudy, due to age, treatment: replace lens
20
New cards
What is macular degeneration
fluid build up between the macula and the choroid
21
New cards
What is a detached retina
when the retina detaches, common in football or happens spontaneously, treatment: laser surgery for reattachment
22
New cards
What is myopia
near-sightedness, the eye is lightly elongated
23
New cards
What is hyperopia
far-sightedness, the eye is slightly shorter
24
New cards
What are the semi circular canals and what does it do
filled with hair cells and fluid, fluid moves and bends the hair cells which signals the brain the movement of the head
25
New cards
What is vertigo
when the hair signals the head is moving when its not
26
New cards
What is the vestibule and what does it do
detects the position of the head, contains otoliths (ear rocks) which fall and land on hair cells
27
New cards
What are the semi circular canals and the vestibule responsible for
What is diabetic peripheral neuropathy, what is the feeling
when nerves start to die, loss of sensation and can only feel pins and needs PAINFUL
38
New cards
What is dermatomes
regions of skin innervated by a single spinal nerve
39
New cards
What is shingles
a nerve rash dormant in the post root ganglion, occurs in stripes through dermatomes, aka chicken pox
40
New cards
What is the autonomic nervous system and what are the two types
involuntary nervous system; sympathetic and parasympathetic
41
New cards
What is the sympathetic nervous system and what does it control
fight/flight, increase of heart rate, bp, breathing, sweat and vasoconstriction; decrease of digestive action, pupils dialate
42
New cards
What is the parasympathetic nervous system and what does it control
rest/digest, decrease of heart rate, bp, breathing; increase of digestive activity, pupils constrict
43
New cards
What is the anatomy of the autonomic nervous system (both sympathetic and parasympathetic)
sympathetic (thoracolmnar division of the and): short preganglionic neruon, ganglia next to spinal cord (sympathetic chain ganglia), long postganglionic neuron, solar plexus - goes to the digestive system; parasympathetic (craniosacral division, doesn’t go to the skin/limbs): long preganglionic neuron, ganglion located in organs, short post ganglionic neuron