MICROANATOMY

ENDOCRINE ORGANS AND RESPIRATORY SYSTEM

ENDOCRINE ORGANS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The part of the eye made up of nervous tissue (photoreceptors) is the ____
A
sclera
B
choroid coat
C
iris
D
retina
E
lens
Explanation: 

Detailed explanation-1: -The retina captures the light that enters your eye and helps translate it into the images you see. Light passes through the lens at the front of your eye and hits the retina. Photoreceptors-cells inside your retina that react to light-change light energy into an electrical signal.

Detailed explanation-2: -Despite its peripheral location, the retina or neural portion of the eye, is actually part of the central nervous system.

Detailed explanation-3: -retina, layer of nervous tissue that covers the inside of the back two-thirds of the eyeball, in which stimulation by light occurs, initiating the sensation of vision. The retina is actually an extension of the brain, formed embryonically from neural tissue and connected to the brain proper by the optic nerve.

Detailed explanation-4: -The retina consists of millions of cells packed together in a tightly knit network spread over the surface of the back of the eye. These cells can be divided into a three basic cell types, photoreceptor cells, neuronal cells, and glial cells. Photoreceptor cells consist principally of cones and rods.

Detailed explanation-5: -The optic nerves relay messages from your eyes to your brain to create visual images. They play a crucial role in your ability to see. Millions of nerve fibers make up each optic nerve.

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