A specialized neuron that detects stimuli and sends info to the central nervous system.
The conversion of a stimulus signal to an electrical signal by a sensory receptor.
The electrical signal produced by sensory transduction.
The tendency of sensory neurons to become less sensitive when they are stimulated repeatedly. ex) a prominent smell becomes unnoticeable over time.
A sensory receptor that detects pain.
A sensory receptor that detects heat/cold.
A sensory receptor that detects changes in the enviroment associated w/ pressure, touch, motion, or sound.
A type of mechanoreceptor sensitive to changes in muscle length.
A type of mechanoreceptor that detects sound waves.
A sensory receptor that detects chemical changes within the body or a specific kind of molecule in the external enviroment.
A sensory receptor that detects energy of diff. wavelengths.
A type of electromagnetic sensory receptor that detects light.
1 of 3 main regions of the ear; made up of auditory canal and the pinna.
The flap-like part of the outer ear, collects sound waves and channels them to the auditory canal.
Part of the outer ear that channels sound waves from the pinna or outer body surface to the eardrum.
A sheet of connective tissue separating the outer ear from the middle ear that vibrates & passes the waves to the middle ear.
1 of 3 main regions of the ear; a chamber containing 3 small bones (the hammer, anvil, and stirrup) that conveys vibrations from the eardrum to the oval window.
An air passage between the middle ear and the throat that equilizes air pressure on either side of the eardrum.
1 of 3 main regions of the vertebrae ear; includes the cochlea, organ of Corti, and semicircular canals.
A coiled tube in the inner ear that contains the hearing organ, the organ of Corti.
Organ of Corti
The hearing organ in birds and mammals, located within the cochlea.
The floor of the middle canal of the inner ear.
Fluid-filled channels in the inner ear that detect changes in the head's rate of rotation or angular movement.
The simplest type of photoreceptor, a cluster of photoreceptor cells shaded by a cuplike cluster of pigmented cells; detects light intensity and direction.
The photoreceptor; made up of many tiny light detectors, each of which detects light from a tiny portion of the field view.
The camera-like eye found in some jellies, polychaetes, spiders, many molluscs, and vertebrates.
The opening in the iris that admits light into the interior of the eye. Muscles in the iris regulate the pupil's size.
The colored part of the vertebrae eye, formed by the anterior portion of the choroid.
The structure in an eye that focuses light rays onto the retina.
The light-sensitive layer in an eye, made up of photoreceptor cells and sensory neurons.
An eye's center of focus and the place on the retina where photoreceptors are highly concentrated.
A layer of connective tissue forming the outer surface of the vertebrae eye. The cornea is the frontal part of the sclera.
The transparent frontal portion of the sclera, which admits light into the vertebrae eye.
A thin, pigmented layer in the vertebrae eye, surrounded by the sclera. The iris is part of the choroid.
A jellylike substance filling the space behind the lens in the vertebrae; helps maintain the shape of the eye.
Plasma-like liquid in the space between the lens and the cornea in the eye; helps maintain the shape, supplies nutrients and oxygen, and disposes of its wastes.
A thin mucous membranethat lines the inner surface of vertebrae eyelids.
The ability of the eyes to distinguish fine detail.
An inability to focus on distant objects; occurs when the eyeball is longer than normal and the lens focuses distant objects in front of the retina; also called myopia.
An inability to focus on close objects; occurs when the eyeball is shorter than normal and the focal point of the lens is behind the retina; also calles hyperopia.
Blurred vision caused by a missshapen lens or cornea.
A photoreceptor cell in the retina stimulated by bright light and enabling color vision.
A photoreceptor cell in the vertebrae retina enabling vision in dim light.
A visual pigment that's located in the rods of the vertebrae eye and that absorbs dim light.
1 of a family of visual pigments in the cones of the vertebrae eye that absorb bright, colored light.