Start with a planet hitting the earth

Chapter 170 Spiciness is not a taste? It is a pain?

Before I knew it, it was night.

Chen Yuan and Ya returned home.

"Would you like something to eat?" came a voice.

Hearing this voice, Chen Yuan turned around and looked at Ya.

"Eat something?"

Yaxiao said: "Well, have something to eat."

Since becoming the sixth-generation gene body, Chen Yuan and Ya no longer need to eat.

Because their body energy comes from various substances.

Now that he heard that Ya was going to get something to eat, Chen Yuan felt a little weird.

He looked at Ya and smiled: "If you want to eat, just get something to eat."

Chen Yuan doesn't care.

"Um."

Chen Yuan sat at the dining table and looked at the food on the dining table. He was enjoying the food while holding the tableware that he had not yet taken.

With his fork stuck into the juicy piece of meat, he looked at the piece of meat in front of him.

Put it in your mouth.

Feel the taste of food.

Chen Yuan was thinking.

"Ordinary creatures will feel hungry after a period of time without eating. So what is the principle of hunger?"

Chen Yuan raised his face and looked at Ya.

Ya smiled: "Ordinary people's bodies are different from ours. Ordinary people have a stomach in their body. When there is food in the stomach, they will feel full. But when the stomach is emptied, the stomach will feel full. Contraction. This is when the brain produces a hormone that tells us we are hungry."

Chen Yuan's eyebrows stretched slightly: "In other words, when we feel hungry, it is actually what our brain tells us."

"Yeah." He said softly.

Regarding hunger, someone did an experiment.

There are many functions in the brain, and one of the areas secretes the 'satiety hormone'. If a person eats and has almost eaten, that area will secrete that hormone to tell the body that it is full.

Some scientists have done an experiment on this.

They removed the area of a cat's brain that secretes satiety hormones.

Then the cat will keep eating, even if its belly is full of food, it will keep eating.

Until death.

Because the cat doesn't feel full.

Chen Yuan became interested. He looked at Ya and said, "What about the taste?"

"People often say that the taste is sweet, sour, bitter and spicy." Chen Yuan said: "Where does the taste come from?"

Ya said: "Well, there are five kinds of taste, sour, sweet, bitter, salty and fresh."

She smiled: "Spicy is not about the taste."

"Spicy is just a pain sensation. You can eat something spicy, break it into pieces, and sprinkle it on a place with nerves, such as your arm, and still get the same feeling."

"It's just that the pain in the mouth is mixed with the taste of the food, so people mistakenly think that spicy food is a taste."

Speaking of this, Ya looked at Chen Yuan and said with a smile: "As for the essence of sour, sweet, bitter, salty and delicious, they are actually substances. Their molecules combine with the receptors of the human body, that is, taste buds, and then react to our brains to become The taste.”

"Actually, all substances have tastes, including things like oxygen that we think have no taste." Ya said: "The reason why we can't smell that smell is because the body has degraded its ability to distinguish those smells."

Ya smiled: "Is it interesting?"

"Does spicy mean pain?" Chen Yuan smiled: "This is quite interesting."

"Hmm..." Ya said: "Also, sweet, everyone likes sweetness. The reason why they like it is because sweetness represents sugar, and sugar is an energy that maintains the body for the human body. The ability that the human body needs, because the human body needs it, so our brains like sweetness.”

"It's not that we are born to like the taste of sweetness, but the feeling we got slowly evolved from a long time ago. The purpose is to let our bodies get more of that kind of high-energy food."

Ya looked at Chen Yuan and said, "It tastes like bitter. Many people hate this taste. That's because most poisonous foods are bitter."

She looked at Chen Yuan and said with a smile: "With the passage of time, the human body has evolved. Originally, there was no bitter taste, but in order to survive, the body evolved a bitter taste. The purpose is to avoid that taste."

Chen Yuan hummed.

"So, the emergence of taste is the result of human evolution? There was no such thing as taste a long time ago?"

Ya nodded slightly: "In the beginning, there was no such thing as taste buds."

Upon hearing this, Chen Yuan's heart moved.

Yes, in the beginning, single-celled organisms, where did the taste buds come from?

In other words, taste is something that has evolved, something that has evolved to allow the race to continue, to avoid poisonous food, and to obtain high-energy food.

"It's really interesting." Chen Yuan smiled.

He looked at Ya and said with a smile: "According to this statement, reproduction..."

Ya blushed, rolled her eyes at Chen Yuan, turned slightly to the side, and did not look at Chen Yuan.

"That's a matter of course. Inheritance is very important. If there is no inheritance, then a race will perish." Ya said: "In order to ensure the continuation of life and the inheritance of genes, reproduction is naturally indispensable."

When Chen Yuan heard this, he thought for a moment: "Is it so important? Then should we work hard?"

Ya turned her face sideways, rolled her eyes at Chen Yuan, and blushed: "What are you trying for...?"

She retracted her gaze: "The reason why we need to inherit is because the body cells of ordinary people will eventually age and die, so we need to pass on our genes through inheritance. The continuation of genes is another way. Eternal life. That way genes have time to gain experience and evolve.”

"We are now immortal and eternal. If we want, we can let our genes evolve at any time."

"For us, inheritance has no meaning, and reproduction has no meaning either."

"Besides..." Ya's face turned slightly red. She turned her face and looked at Chen Yuan: "You are a bad guy and you don't plan to have children..."

Chen Yuan was happy, and he smiled: "After all, as I told you, we have eternal life, inheritance is meaningless, what are we going to do with children?"

He stood up and came to Ya.

Hug Yaheng into his arms.

Ya's face turned red, she raised her face and looked at Chen Yuan: "If you don't want children and don't reproduce, why are you still so bad?"

Chen Yuan looked at Ya and said with a smile, "Isn't this what you like?"

"Who likes it?"

"Well, that's what I like."

Ya's little face leaned against Chen Yuan's chest, her eyes closed, her cheeks flushed slightly: "You have become bad."

She said this, but she didn't resist.

Chen Yuan laid Ya flat on the bed.

He looked into Ya's eyes.

Eyes facing each other.

Chen Yuan raised his hand and stroked her cheek.