Sensory Receptors
Respond to visible wavelengths of light. They transduce light energy...
Photoreceptors
Tough, fibrous tissue, generously supplied with nerve endings. "White of the eye"
Sclera
Colored part of the eye is known as...
Iris
The ____ are responsible mainly for vision in dim light or darkness.
Rods
The eye is protected by:
1).
2).
1). Position in the body
2). Accessory Structures
Transduce the energy of certain chemical compounds..
Chemoreceptors
Transparent layer that covers the iris and the pupil at the front of the eye. "Window of the eye"...
Cornea
The black spot, or opening in the center of the circular muscles of the iris is known as...
The pupil of the eye
For vision to occur, light must pass through the eye and form an image on the ________.
Retina
Our eyes are cushioned by layers of ...
Fat
Known as pain receptors...
Nociceptors
Moist mucous membrane that extends as a continuous lining of the inner layer of the eyelids...
Conjunctiva
The _________ of the eye is an adjustable, transparent, elastic ball that lies just behind the iris.
Lens
The _______ are responsible for color vision and vision during daylight.
Cones
Tears flow continuously from the _______ _________.
Lacrimal Glands
These receptors transduce mechanical energy- touch, pressure, gravity, stretching, and movement...
Mechanoreceptors
Second layer of the eyeball which is made up of black pigment cells that absorb light rays...
Choroid
The ability to change focus for near or far vision by changing the shape of the lens is known as...
Accommodation
The area where the optic nerve passes out of the eyeball, also known as the "blind spot"....
Optic Disk
Help protect the eyelid anteriorly from foreign objects...
Eyelashes and Eyelids
Respond to heat...
Thermoreceptors
Innermost layer of the eye, containing photoreceptors...
Retina
These six muscles that permit the eyes to move together to focus on an object are known as...
Extrinsic Muscles
The region of the sharpest vision is....
Fovea
When danger threatens the eyes, the lids close by...
Reflex Action