DCCC BIO 150 FINAL EXAM
Gustatory- Taste - ANSWERS-Chemoreceptors - sensitive to chemicals
in food
Taste Buds: organ formed by papillae on surface of tongue
4 types
4 types of receptors: sweet, sour, bitter, salty
2 Cranial Nerves:
Facial - anterior 2/3
Glossopharangeal -posterior 1/3
Smell - Olfaction - ANSWERS-Olfactory Neurons - superior cavity of
nasal cavity
Cilia that extend off of them are the receptors
Chemoreceptors
Chemicals dissolve in nasal mucosa
Cranial Nerve: Olfactory -I
Vision - ANSWERS-Photoreceptors
Organ: eyeball (bulbus oculi)
Cranial Nerve II - Optic
,The Eye - ANSWERS-Bony Orbit/Socket - made up of 7 cranial bones
Conjunctiva
Thin mucous membrane that lines eyelid and produces mucus to keep
eyes from drying out
Lacrimal Gland
produces tears, moisten, lubricate and cleanses anterior surface of eyes
Structure of the Eyeball - ANSWERS-Wall of Eyeball is made up of
three concentric coats or tunics
Fibrous tunic - outermost
Vascular tunic - middle layer
Nervous Tunic - retina, innermost
Sclera - ANSWERS-white and opaque
Covers posterior 5/6 of eye
Muscles that move eye are attached here
Cornea - ANSWERS-transparent
Covers anterior 1/6 of eye
"window" of the eye
,Helps focus light rays entering eye
Choroid - ANSWERS-Brown pigment between sclera and retina in
posterior eye
Absorbs excess light rays that might interfere with vision
Ciliary Body - ANSWERS-Anteriorly the choroid is continuous with
this
Suspensory ligament - connects ciliary body to lens of eyes
Ciliary muscle - contraction relaxes suspensory ligament and lens bulges
to allow focus for close vision
Iris - ANSWERS-Colored portion of eye
Muscles regulate the amount of light entering eye
Radial Muscles - dilate pupil
Circular Muscles - pupil gets smaller
Pupil - ANSWERS-Donut shaped diaphragm with central opening
where light passes
Anterior Cavity - ANSWERS-Space anterior to the lens, between cornea
and lens
, Filled with Aqueous Humor
Helps maintain shape of anterior Eye
Nourishes structures in that region
Responsible for internal pressure of eye
Posterior Cavity - ANSWERS-between lens and retina
Filled with Vitreous Humor
Presses retina firmly against wall of eye
Supports internal parts of the eye
Maintains it's shape
Rods - ANSWERS-Sensitive to dim light
Lacks fine detail
More numerous than cones
Rhodopsin: photopigment made up of protein and Vitamin A
Cones - ANSWERS-For color vision and visual acuity
In fovea centralis
Provide sharp images and fine details
3 types: green light, blue light, red light
Gustatory- Taste - ANSWERS-Chemoreceptors - sensitive to chemicals
in food
Taste Buds: organ formed by papillae on surface of tongue
4 types
4 types of receptors: sweet, sour, bitter, salty
2 Cranial Nerves:
Facial - anterior 2/3
Glossopharangeal -posterior 1/3
Smell - Olfaction - ANSWERS-Olfactory Neurons - superior cavity of
nasal cavity
Cilia that extend off of them are the receptors
Chemoreceptors
Chemicals dissolve in nasal mucosa
Cranial Nerve: Olfactory -I
Vision - ANSWERS-Photoreceptors
Organ: eyeball (bulbus oculi)
Cranial Nerve II - Optic
,The Eye - ANSWERS-Bony Orbit/Socket - made up of 7 cranial bones
Conjunctiva
Thin mucous membrane that lines eyelid and produces mucus to keep
eyes from drying out
Lacrimal Gland
produces tears, moisten, lubricate and cleanses anterior surface of eyes
Structure of the Eyeball - ANSWERS-Wall of Eyeball is made up of
three concentric coats or tunics
Fibrous tunic - outermost
Vascular tunic - middle layer
Nervous Tunic - retina, innermost
Sclera - ANSWERS-white and opaque
Covers posterior 5/6 of eye
Muscles that move eye are attached here
Cornea - ANSWERS-transparent
Covers anterior 1/6 of eye
"window" of the eye
,Helps focus light rays entering eye
Choroid - ANSWERS-Brown pigment between sclera and retina in
posterior eye
Absorbs excess light rays that might interfere with vision
Ciliary Body - ANSWERS-Anteriorly the choroid is continuous with
this
Suspensory ligament - connects ciliary body to lens of eyes
Ciliary muscle - contraction relaxes suspensory ligament and lens bulges
to allow focus for close vision
Iris - ANSWERS-Colored portion of eye
Muscles regulate the amount of light entering eye
Radial Muscles - dilate pupil
Circular Muscles - pupil gets smaller
Pupil - ANSWERS-Donut shaped diaphragm with central opening
where light passes
Anterior Cavity - ANSWERS-Space anterior to the lens, between cornea
and lens
, Filled with Aqueous Humor
Helps maintain shape of anterior Eye
Nourishes structures in that region
Responsible for internal pressure of eye
Posterior Cavity - ANSWERS-between lens and retina
Filled with Vitreous Humor
Presses retina firmly against wall of eye
Supports internal parts of the eye
Maintains it's shape
Rods - ANSWERS-Sensitive to dim light
Lacks fine detail
More numerous than cones
Rhodopsin: photopigment made up of protein and Vitamin A
Cones - ANSWERS-For color vision and visual acuity
In fovea centralis
Provide sharp images and fine details
3 types: green light, blue light, red light
