The _______ system protects a person by detecting _______ in the environment.
stimulus; nerve impulse
An environmental change becomes a _______ when it initiates a ________ ________.
sensory / afferent
A stimulus travels to the central nervous system by way of a ________ neuron.
The sensory system helps maintain ________.
The part of the nervous system that detects a stimulus is the ________ ________.
Receptors can be classified according to the type of ________ to which they respond.
Chemoreceptors detect ________ and ________.
________ are located in the ________ of the eye, and respond to light.
________ detect change in temperature, and are located in the skin.
Mechanorecptors respond to _______.
A stimulus of adequate intensity is known as a _______ _______.
threshold; nerve impulse
Any receptor must receive a _______ stimulus in order to respond and generate a _______ _______.
special; special sense
A _______ special sense is located in a _______ _______ organ.
A _______ _______ is widely distributed throughout the body.
Vision, hearing, equilibrium, taste, and equilibrium are all _______ _______.
skin; internal organs
Pressure, temperature, pain, and touch our receptors found in the _______ and ________ ________.
The _______ and _______ help to keep foreign matter out of the eye.
conjunctiva; eyelid; sclera
A thin membrane called the ________ in lines the inner surface of the _______ and covers a visible portion of the white of the eye, (the _______).
lacrimal; lubricate; infection
Tears produced by the _______ glands _______ the eye and contains an enzyme that protects against _______.
An excess of two years causes a "_______ _______".
The sclera is the outermost _______.
connective; white of the eye
The sclera is made of tough ________ tissue and is commonly referred to as the "_______ ____ ____ _____"
The _______ is it the second tunic of the eyeball.
The _______ maybe compared to the Dole blacked lining of a camera that prevents incoming light rays from scattering and reflecting off the eye's _______ surface.
The retina is the _______ tunic.
The _______ is the eyes actual receptor layer.
The tunic's _______ layer is the eyes actual receptor layer.
receptor; rods; cones
The retina is the eyes actual _______ layer and contains light sensitive cells known as _______ and _______.
_______ is the process of bending light rays as they pass from one substance to another substance of different density
List the order in which light travels through the eye: (1) aqueous humor; (2) lens; (3) cornea; (4) vitreous body; (5) retina
rods; sharp image
The _____ or highly sensitive to light and thus function and in light, but they do not provide a _______ _______.
bright; color; sharp images
The Cones function in _______ light, are sensitive to _______, and give _______ _______.
_______ _______ results from a lack of rectal cones.
Color blindness results from a lack of _______ _______
A; rhodopsin; night blindness
If a person is lacking in vitamin ____, and thus ________, he or she may have _______ _______.
A person who has difficulty seeing in _____ light because the light is in adequate to activate the _____, they have night blindness.
The voluntary muscles attached to the eyeball's outer surface are called the _______ muscles.
The _______ _______ pull on the eyeball in a coordinated fashion so that both eyeballs center on one visual field.
A) tunics; B) vitreous body; C) suspensory ligaments; D) cornea; E) iris; F) muscle ciliary; G) conjunctival sac
A) sclers; B) choroid; C) retina; F) pupil; G) lens; H) optical nerve
The _______ is the colored or pigmented part of the eye and is composed of ______ sets of muscle fibers.
The iris governs of the ______ of the iris's central opening.
The central opening of the iris is called the _______.
The ear is the sense for again for both hearing and ________.
outer, middle, inner ear
The ear is divided into what the three main sections?
tympanic membrane; external auditory
The _______ _______, or your drum, is at the end of the ________ ________ canal.
middle ear; vibrates
The boundary of the tympanic membrane is between the external auditory canal and the _______ _____ cavity, and it _______ freely as sound waves enter into the ear.
The middle ear cavity is a small, the contains three small bones, or ________.
Receptors located in the vestibule's to small chambers sense _______ _______.
head; body; straight
Static equilibrium is the position of the ______ or the position of the ______ when moving in a _______ line.
equilibrium / balance
The sensory receptors in the inner ear are those related to ________.
When the body is spinning a moving in different directions that is called _______ _______.
The receptors that sense dynamic equilibrium are called _______ and are located at the bases of the ____________ canals.
The sense of taste is called _______.
Taste receptors are known as _______ _____.
The sense of smell is called _______.
Touch receptors are called _______ _______.
The interpretation of _______ is closely related to the sense of taste, but a greater variety of chemicals can be dissolved by this sense.
Three receptors in the walls of the large arteries that monitor _______ pressure are called _____________.
temperature; nerve endings; heat; cold
The ________ receptors are free _______ _______ and are widely distributed in the skin. There are separate receptors for ______ and ______.
Recepttors located in the muscles tendons and joints are called ________.
Proprioreceptors judge one's _______ and changes in the _______ of body parts in relation to each other.
skin; muscles; joints; internal
Pain receptors are widely distributed in the ______, ______, and ______ and to a lesser extent in most _______ organs.