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WorksheetsCow Eye Dissection -Post Lab Check
Total questions: 30
Worksheet time: 21mins
The following list contains many of the structures that light must pass through to reach the rods and cones. Place the structures in order that light would pass through them.
Cornea
Aqueous Humor (Liquid Filled Anterior Cavity)
Lens
Vitreous Humor (Gel Filled Posterior Cavity)
Bipolar Neurons and Ganglion Cells
Once light is absorbed, what is the path of the nervous signal?
Rod or Cone --> Bipolar Neuron --> Ganglion Cell --> Optic Nerve
Rod --> Cone --> Ganglion Cell --> Bipolar Neuron --> Optic Nerve
Pigmented Layer --> Rod or Cone --> Bipolar Neuron --> Ganglion Cell
Which part of the neural layer continues into and becomes the optic nerve?
Rods
Cones
Bipolar Neurons
Ganglion Cells
Different animal species differ in the relative number of rods and cones that are present in their eyes. Which of the following statements would you expect to be true about these differences?
Nocturnal (active at night) species will have relatively more rods in their eyes; diurnal (active in the day) species will have relatively more cones.
Species that require better depth perception will have relatively more cones in their eyes; species that require greater field of vision will have more rods.
Nocturnal (active at night) species will have relatively more cones in their eyes; diurnal (active in the day) species will have relatively more rods.
Which of the following statements is true for cones?
There are more cones than rods in the retina.
They are specialized for low light vision.
They are concentrated in the center of the retina.
They are named for their long cylindrical shape.
What is the difference between special senses and general senses?
Special senses are located in special sense organs, while general senses are distributed throughout the body.
General senses include sight, taste, and equilibrium; special senses include pressure, temperature, and pain.
The receptors for general senses are receptor cells, while special senses use modified nerve endings.
Which of the following correctly matches the sense to the type of stimulus it measures in the environment?
Electromagnetic radiation: Smell.
Pressure waves traveling through a fluid: Hearing.
Chemical properties of gasses dissolved in a liquid: Equilibrium.
Movement and gravity: Sight.
Identify the layer of the eye that function to protect the eye.
Fibrous Layer.
Vascular Layer.
Neural
Inner Layer.
Which structure(s) of the middle layer contains muscles?
Iris & ciliary body.
Iris only.
Choroid & ciliary body.
Which of the following would increase the total amount of light coming into the eye?
Activation of the parasympathetic nervous system.
Activation of the sympathetic nervous system.
Looking at something close to the face.
Resting
Which structure of the eye changes the shape of the lens to focus light on the retina?
Ciliary body
Sclera
Iris
What is the function of the aqueous humor in the healthy eye?
To protect the optic nerve
To maintain healthy eye pressure
Number 1 is the _____.
Iris
Cornea
Lens
Sclera
Number 2 is the _____.
Iris
Pupil
Retina
Sclera
The function of #1 is_________.
Clear covering that absorbs the light with pigmented cells
Clear covering that allows the entry of light into the eyes.
The function of #2 is ______.
thin, clear covering that allows light to enter the eye
thick, tough covering that protects the eye from injury
thick, clear covering that protects the eye from injury
The function of #3 is _______________.
To move the eye from side to side
To transmit light information into motor signals
To keep the eye attached to the eye socket
To transmit light information into electrical signals
The ability to see better at night for the sheep is due to all of the following except
Cones
Rods
Tapetum lucidum
Pupil size
When comparing the aqueous humor and vitreous humor - which statement is false?
The aqueous humor is located in the anterior eye chamber.
The aqueous humor is made of cloudy, watery material.
The vitreous humor is located in the anterior eye chamber.
The vitreous humor is made of cloudy, gelatinous material.
A clear fluid that fills the space between the lens and the cornea. It carries nutrients to the cornea because the cornea has not blood supply and it helps the CORNEA keep its rounded shape..
aqueous humor
vitreous humor
sclera
choroid coat
One kind of light-sensitive or photoreceptor cells in the retina. These receptors are for color.
rods
blind spot
cones
cornea
A muscle that controls how much light enters the eye. It is suspended between the cornea and the lens. Human ________ come in many colors, including brown, blue, green, and gray.
iris
lens
myelin
optic nerve
A clear flexible structure that allows light to pass through it and focuses light on the retina. The _____ is flexible so that it can change shape, focusing on objects that are close up and objects that are far away.
iris
lens
pupil
choroid coat
The bundle of nerve fibers that carry information from the retina to the brain.
iris
lens
myelin
optic nerve
The _________ is the dark circle in the center of your iris. It’s a hole that lets light into the inner eye.
pupil
retina
rods
sclera
The layer of light-sensitive cells at the back of the eye that detects images focused by the cornea and the lens. It is connected to the brain by the optic nerve.
pupil
retina
choroid coat
sclera
The thick, tough, white outer covering of the eyeball. This connective tissue maintains the shape of the eyeball and protects the inside of the eye.
retina
cornea
choroid coat
sclera
The colorful, shiny material located behind the retina. Found in animals with good night vision, the ________ reflects light back through the retina.
tapetum lucidum
vitreous humor
choroid coat
cornea
Muscles attached to the lens that change the shape of the LENS for focus (near/far sight)
pupil
ciliary body processes
iris
sclera
This dark layer of the eye is located behind the retina. It prevents light from scattering and is richly supplied with blood vessels that supply nutrients to the eye.
sclera
vitreous humor
retina
choroid coat (pigmented layer)
