Cones are concentrated at the center of retina called fovea centralis where no rod cells are present.
The retina is the innermost lining of the eye, made up of thousands of light-sensitive cells, with an inner part of nerve tissue and a pigmented outer part. It plays a fundamental role in the formation of images, which will be projected and then sent to the brain, through electrical impulses.
The retina consists of three types of layers: bipolar neurons, ganglion neurons and photosensitive cells.
Bipolar neurons promote the union of photosensitive cells with ganglion neurons, which are grouped with nerve fibers and thus originate the optic nerve. It carries nerve impulses to the brain. Photosensitive cells, due to their shape, are named in two types: cones and rods.
There are about 6 million cones that are concentrated in a small depression located in the macula lutea (center of the retina) called the fovea. They have an elongated and cylindrical shape, with conical outer segments. It is in this region that the image is most clearly formed, as they are stimulated by the most intense light. Cones are specialized in the accuracy of daytime vision and in recognizing color. There are three types of cones that have fundamental photopigments that respond to light of wavelengths (λ): cyanopigment - S cones (short λ) - sensitive to blue color, chloropigment - M cones (medium λ) - sensitive to green color and erytopigment - cones L (λ long) - sensitive to red color. The brain interprets the signals received by these cones, which allows it to process color differentiation.
The Incas had a centrally planned economy, perhaps the most successful ever seen. Its success was in the efficient management of labor and the administration of resources they collected as tribute. Economic exchanges were made using the barter system by which people traded with each other for things they needed.
Answer: China was named by Zhonghua Renmin Gong He Guo
Under the Ming, China was the 'Great Ming,' under the Qing, China was the 'Great Qing,' and so on. Yet on unofficial documents, the name 'Zhongguo' lived on. The full given name of China today is 'Zhonghua Renmin Gong He Guo,' or People's Republic of China
One parent picks up the child from daycare while the other parent goes to the grocery store and begins to make dinner. This is an example of which principle is at work?
The correct answer is There are gains from trade.
<h3>Why are there gains from trade?</h3>
The price of one commodity relative to the other commodity that the two countries agree to trade. Good trade conditions allow a country to import goods at a lower opportunity cost than the cost of producing goods domestically, thus benefiting the country from trade.
Trade is central to ending world poverty. Countries that are open to international trade tend to grow faster, innovate, be more productive, and provide people with higher incomes and more opportunities. Open trade also benefits low-income households by providing consumers with more affordable goods and services.
Learn more about principles at work here
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