Nerve06/eyes and ears/photoreceptor cells 2

There are two kinds of photoreceptor cells: rod cells and cone cells. The cone cells have higher resolution, and are used for distinguishing colors and shape. They are abundantly located around the 黄斑, which is in the center of the retina. Meanwhile, the rod cell, which has less resolution, are located around the periphery of the retina.

Therefore, the eyesight resolution is not constant throughout the retina. Because the cone cells are dense in the center of the retina and, adjust is made so that the light from the object to be watched reaches the 黄斑. Try reading this material without moving your neck or eye. You can easily tell that the resolution within your visual field is not constant.

There are 3 kinds of cone cells each specifically sensitive to red, green and blue colors. The ratio of stimulation to each cell determines the color being sensed.

Challenge Quiz

<GIFT> //LEVEL:3 //RAND The {=cone.~rod} cells are rich in the center of the retina.

//LEVEL:3 //RAND The {~cone.=rod} cells are rich in the periphery of the retina.

//LEVEL:3 //RAND The cone cells are rich in the {=center.~periphery} of the retina.

//LEVEL:3 //RAND The rod cells are rich in the {~center.=periphery} of the retina.

//LEVEL:2 //RAND The resolution of the cone cells are {~low.=high}.

//LEVEL:2 //RAND The resolution of the rod cells are {=low.~high}.

//LEVEL:3 //RAND The eyesight resolution is homogeneous throughout the retina. {~false.=true}

//LEVEL:3 //RAND There are cone cells specifically sensitive to red, green and yellow. {~true.=true}