Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Sense of Sight - Eye
The special senses - sense of sight - eye
| Question | Answer |
|---|---|
| The WHAT are the organs of vision; they contain the visual WHAT? | Eyes, receptors |
| Assisting the eyes in their functions and protecting them from injury are the WHAT WHAT organs? | Visual accessory |
| The visual accessory organs include what 6 parts? | Eyebrows, eyelids, conjunctiva, eyelashes, lacrimal apparatus, extrinsic eye muscles |
| This accessory structure keeps perspiration out of the eyes and shades the eyes from glaring sunlight. | Eyebrows |
| This accessory structure protects the yes and prevents the entrance of foreign objects and washes tears over the surface of the eye. | Eyelids |
| The eyelids are also called WHAT? | Palpebrae |
| This accessory structure is a thin mucous membrane that lines the inner surface of the eyelids. | Conjunctiva |
| This accessory structure secretes a think mucous film that moistens the surface of the eye. | Conjunctiva |
| This accessory structure helps trap dust. | Eyelashes |
| This accessory structure is concerned with the secretion, distribution, and drainage of tears. | Lacrimal Apparatus |
| The extrinsic eye muscles also function as visual WHAT WHAT? | Accessory organs |
| The eyeball is composed of 3 layers. What are they? | Sclera, choroid, retina |
| The outermost layer of the eyeball is called the WHAT? | Sclera |
| The WHAT is a tough fibrous connective tissue that covers most of eyeball, shapes the eye and is the site of attachment for the extrinsic eye muscles. | Sclera |
| A transparent extension of the sclera is called the WHAT? | Cornea |
| The WHAT covers the area over the iris (coloured portion of eye). | Cornea |
| Light enters the eye first through the WHAT? | Cornea |
| The middle layer of the eye is called the WHAT? | Choroid |
| This layer of the eye is highly vascular and is attached to the innermost layer, the retina. | Choroid |
| The choroid extends toward the front of the eyeball to form the WHAT body and the iris? | Ciliary |
| Collectively, the middle layer of the eye includes 3 parts and is called the uvea. | Choroid, ciliary muscle, and iris |
| The ciliary body secretes a fluid called WHAT and gives rise to a set of intrinsic eye muscles call the ciliary muscles. | aqueous humor |
| The most anterior portion of this middle layer is the iris, the colored portion of the anterior eye. | Choroid |
| The innermost layer of the eyeball is called the WHAT? | Retina |
| The retina is the nervous layer containing the visual WHAT which are sensitive to light and are therefore called photoreceptors. | Receptors |
| The two types of photoreceptors are called WHAT? | Rods, cones |
| This type of photoreceptor is most abundant along the periphery of the retina, are sensitive to dim light and provide us with black and white vision. | Rods |
| This type of photoreceptor is most abundant in the central portion of the retina and provide us with colour vision. | Cones |
| A second small circular area of the retina in the back of the eye has neurons that form the optic nerve. It contains no rods or cones and is known as the WHAT? | Optic disc |
| The optic disc is also knows as the blind spot because it has no WHAT on it? | Photoreceptors |
| There are two cavities in the eyeball, what are they? | Posterior and anterior cavities |
| The posterior cavity is larger and is located between the lens and retina and is filled with a gel like substance called WHAT? | Aqueous humor |
| Aqueous humor is produced by the WHAT body? | Ciliary body |
| Aqueous humor is produced by the ciliary body and circulates through the pupil into the space behind the WHAT? | Cornea |
| The aqueous humor 1. maintains the shape of the WHAT portion of the eye and 2. provides nourishment for the WHAT? | Anterior, cornea |
| The aqueous humor leaves the anterior cavity by way of tiny canals located at the junction of the sclera and the WHAT? | Cornea |
| The aqueous humor leaves the anterior cavity via tiny canals. These outlet canals are called venous sinuses or the canals of WHAT? | Schlemm |
| There are two groups of muscles associated with the eye. What are they? | Extrinsic eye muscles and intrinsic eye muscles |
| These eye muscles move the eyeball in its bony orbit. | Extrinsic eye muscles |
| These eye muscles move structures within the eyeball. | Intrinsic eye muscles |
| The extrinsic eye muscles are skeletal muscles located BLANK the eye. | Outside |
| Six BLANK eye muscles attach to the bone of the eye orbit and the sclera (the tough outer connective tissue layer of the eyeball). | Extrinsic |
| There are four BLANK muscles and two BLANK muscles. | Rectus muscles, oblique muscles |
| The BLANK eye muscles are smooth muscles located in the eyeball, specifically in the iris and the ciliary body. | Intrinsic |
| The iris is composed of 2 eye muscles. What are they? | Radial muscle and circular muscle |
| The radius and circular muscles of the iris control the size of the WHAT and regulate the amount of light that enters the eye. | Pupil |
| Sympathetic WHAT fibers supply the radial muscles. | Nerve |
| Sympathetic nerve stimulation causes pupillary dilation also called WHAT? | Mydriasis (drugs that dilate the pupil are called mydriatic agents) |
| Contraction of the WHAT muscles of the iris causes the pupil to constrict, decreasing amount of light entering the eye. | Circular |
| Parasympathetic nerve stimulation causes pupillary constriction also called WHAT? | Miosis |
| The third intrinsic eye muscle is the WHAT muscle? | Ciliary |
| The BLANK muscles arise from the BLANK body. They attached to suspensory ligaments which in turn tug on the lens, causing the lens to change its shape | Ciliary, ciliary |
Created by:
JoJo500%
Popular Biology sets