Five Senses Quiz

five senses that keep us in touch with what is going on in the external world:

How many percent of sensory receptors in the body are in the eyes

The adult eyes are measured about?

_____ of the eye include the extrinsic eye muscles, eyelids, conjunctiva, and lacrimal apparatus.

In the anterior part of the eye, the eyes are protected by?

The eyelids will meet at what part of the eyes?

The space between the eyelids in an open eye is called the_____

Projecting from the boarder of each eyelids is called?

It is a modified sebaceous associated with eyelids edges?

These glands produce an oil that lubricates the eyes

It is a modified sweat glands, lie between the eyelashes (cilium = eyelash), and their ducts open at the eyelash follicles

On the medial aspect of each eye is the____?, a raised area containing sebaceous and sweat glands that produce an oily, whitish secretion that also lubricates the eye

secretes mucus, which helps to lubricate the eyeball and keep it moist.

consists of the lacrimal gland and a number of ducts that drain lacrimal secretions into the nasal cavity.

are located above the lateral end of each eye. They continually release a dilute Salt solution (tears) onto the anterior surface of the eyeball through several small ducts.

I sunod sunod ang giagian sa tears from the lacrimal glands include lacrimal glands sa answer

an enzyme that destroys bacteria.

Inflammation of the conjunctiva, called____?

its infectious form caused by bacteria or viruses, is Highly contagious

How many extrinsic muscles do we have?

These muscles produce gross eye movements and make it possible for the eyes to follow a moving object. gives the names, locations, actions, and cranial nerve serving each of these muscles.

is a hollow sphere. Its wall is composed of three tunics, or layers, and its interior is filled with fluids called humors that help to maintain its shape.

What fluid that fills the interior of our eyeball

it is the main focusing apparatus of the eye, is supported upright within the eye cavity, dividing it into two chambers.

What are the three layers of eyeball?

It is the outermost layer of the eyeball

It consist the protective sclera and transparent cornea

is seen anteriorly as the “white of the eye.”

It is the central anterior portion of the fibrous layer is crystal clear. This “window” is the_____?

What transparent layer of the eye that is well supplied with nerve endings? That if you it, it will increase the tears.

It is the most exposed part of the eye and it is vulnerable to damage

the only tissue in the body that is transplanted from one person to another without the worry of rejection. Because it has no blood vessels, it is beyond the reach of immune system

It is the middle layer of the eyeball

Most posterior of vascular layer a bloodrich nutritive tunic that contains a dark pigment. The pigment prevents light from scattering inside the eye

What are the two muscle structure of choroid?

ciliary body, which is attached to the lens by a suspensory ligament called____?

it regulates the amount of light entering the eye so that we can see as clearly as possible in the available light

the _____ through which light passes. Circularly and radially arranged smooth muscle fibers form the iris, which acts like the diaphragm of a camera.

The innermost sensory layer of the eye is the delicate two-layered ___?which extends anteriorly only to the ciliary body.

The outer ____ layer of the retina is omposed of pigmented cells that, like those of the choroid, absorb light and prevent light from scattering inside the eye. They also act as phagocytes to remove dead or damaged receptor cells and store vitamin A needed for vision.

What is the transparent layer of retina

They are called PHOTORECEPTORS because they respond to light

Electrical signals pass from the photoreceptors via a two-neuron chain called_____?

list in sequence the neural layer in retina which is the first step is the rods and cones which is the photoreceptors and then?

The blind spot in our vision

this photoreceptors allow us to see in gray tones in dim light, and they provide our peripheral vision.

Anything that interferes with rod function hinders our ability to see at night. This condition, called_____?

is one of the building blocks of the pigments the photoreceptor cells need to respond to light

are discriminatory receptors that allow us to see the details of our world in color under right light conditions. They are densest in the center of the retina and decrease in number toward the retinal edge.

The area of the retina with the greatest concentration of cones( your area focus…. you test it’s functionality when you read the Eye chart)

is a condition in which the lens of the eye is warped. The warped lens will cause images to appear out of focus on the retina.

This is a condition in which distant objects are seen more clearly than are object that are nearby. This is because light is focused behind the retina rather than on it.

This is a condition in which objects that are nearby are seen clearly while objects in the distance are out of focus. This is because the light is focused in front of the retina rather than on the retina.

is one of the major causes of blindness. High pressure builds in the eye and damages the optic nerve. Any vision that is lost is not repairable.

are when the clear transparent lens of the eye develops a cloudy or milky covering. It prevents the eye from being able to see. Although it can happen to young people, it is mostly found in the elderly.

this humor helps prevent the eyeball from collapsing inward by reinforcing it internally.

Aqueous humor is reabsorbed into the venous blood through the?

is a common cause of blindness in the elderly

the pressure inside the eye. It also provides nutrients for the avascular lens and cornea

It is an instrument that is used to measure the intraocular pressure, which should be tested yearly in people over 40.

is an instrument that illuminates the interior of the eyeball, allowing the retina, optic disc, and internal blood vessels at the fundus, or posterior wall of the eye, to be viewed and examined

What is the posterior wall of the eye

When light passes from one substance to another substance that has a different density, its speed changes and its rays are bent, or

The image formed on the retina as a result of the light-bending activity of the lens is a____?

This ability of the eye to focus specifically for close objects (those less than 20 feet away) is called ____?

is the loss of the same side of the visual field of both eyes, which results from damage to the visual cortex on one side only

thee eye that focuses images correctly on the retina is said to have emmetropia, literally, “harmonious vision.

occurs when the parallel light rays from distant objects fail to reach the retina and instead are focused in front of it;

What lenses should you use if you have myopic eye?

usually results from an eyeball that is too short or from a “lazy” lens

occurs when the parallel light rays from distant objects are focused behind the retina—at least in the resting eye, in which the lens is flat and the ciliary muscle is relaxed

What lens should you use if you have hyperopia?

In this condition, blurry images occur because points of light are focused not as points on the retina but as lines

What lenses should you use if you have astigmatism

is the reflexive movement of the eyes medially when we view close objects. When convergence occurs, both eyes are aimed toward the near object being viewed

When the eyes are suddenly exposed to bright light, the pupils immediately constrict; this is the___? What reflex?

long periods of reading tire the eyes and often result in what is commonly called ____?

Which of the following correctly describes the pathway of light passing through the eye to the retina?