Chapter 10: Senses Flashcards
What are Photoreceptors?
Receptors that are sensitive to change in intensity or color of light, as in vision
What are Chemoreceptors?
Receptors that are sensitive to presence of certain chemicals, as in taste or smell
What are Pain receptors?
Receptors that are sensitive to physical injury
What are Thermoreceptors?
Receptors that are sensitive to changes in temperature
What are Mechanoreceptors?
Receptors that are sensitive to mechanical stimuli that change their position or shape
The ability to distinguish one touch stimulus from two is called ____ ____ .
two-point discrimination
What are proprioceptors?
General sensory receptors found near the point of junction between tendons and muscles and others found deep within skeletal muscle tissue.
Name the 3 layers of the eyeball.
1) Fibrous Layer 2) Vascular Layer 3) Inner Layer
A mucous membrane known as the ____ lines the eyelids and covers the fibrous layer in front.
conjunctiva
Most of the vascular layer is made up of the ____, which contains a large amount of the dark pigment melanin
choroid
The lens of the eye is held in place by a ligament attached to an involuntary muscle called the ___ ___.
ciliary muscle
The term for “oldsightedness.”
Presbyopia
___ are the receptors for night vision and ____ are the receptors for daytime vision.
rods, cones
____ ____ is the name of the watery fluid in front of the lens (in the anterior chamber of the eye), and ____ ____ is the name of the jellylike fluid behind the lens (in the posterior chamber)
Aqueous humor, Vitreous Humor
The innermost layer of the retina contains the rods and cones, which are the ___ ___ of the eye.
photoreceptor cells
____ occurs as light passes through the cornea, the aqueous humor, the lens, and the vitreous humor on its way to the retina.
Refraction
What is the function of melanin in the choroid?
Melanin helps prevent the scattering of incoming light rays, which could make it hard for the eye to focus an image.
What is the function of the ganglion cells of the retina?
Information from ganglion cells helps the body determine whether it is day or night, as well as the level of moonlight (monthly phases).
The external ear is made up of these 3 areas:
1) Auricle or Pinna 2) External Acoustic Canal 3) Tympanic Membrane or Eardrum
Another word for eardrum:
Tympanic membrane
What is the auditory tube and what is its function?
A tube that connects the throat with the middle ear. The function of a healthy auditory tube is to equalize air pressure between the middle ear and the outside environment.
The bony labyrinth is located in the ____ ear.
Inner
Bony labyrinth is filled with ____.
perilymph (the fluid between the membranous labyrinth of the ear and the bone that encloses it)
Membranous labyrinth filled with ____.
endolymph (the fluid contained in the membranous labyrinth of the inner ear).
