Want to win the palace fight? Better to be crazy than to be idiotic!

Wang Qian, wearing a palace dress, floated quietly in the water, as if she had merged into one with the water plants.

Su Feiran didn't dare to delay. He swam quickly to Wang Qian's side using his hands and feet, grabbed her arm, and pulled her close to him.

Wang Qian closed her eyes tightly, her face full of fear. Su Feiran couldn't tell if she was still alive, but he had to rescue her to shore before deciding whether she was dead or alive.

"Don't be afraid, Su Feiran, don't be afraid!" Su Feiran gritted his teeth and kept cheering himself up in his heart.

She lifted Wang Qian's right arm and placed it on her shoulder. She suddenly felt as if she was carrying a sandbag weighing over 100 pounds. Her hands and feet were so heavy that she almost couldn't lift them.

Su Feiran looked up at the distant water surface, then looked down at the turbid bottom of the water, and kicked fiercely towards the light above.

The Dagu Dynasty Science Knowledge Classroom is now open~

In times of crisis, people will naturally fall into a state of stress. At this time, the human body's sympathetic nervous system becomes abnormally active, stimulating the secretion of neuropeptide Y (NPY), a substance related to stress response. Although it can help improve alertness, it may also cause anxiety or even depression when taken in excess. Although neuropeptide Y can increase tension in some cases, in general, its role in the central nervous system is to help reduce anxiety and stress responses. It helps individuals better cope with stress by regulating stress pathways in the brain.

Not only that, NPY can increase appetite under stress, especially the demand for high-energy foods. This is a coping mechanism of the body to ensure that there are sufficient energy reserves in the later stages of stress. In addition, studies have shown that NPY can improve cognitive function to a certain extent, helping individuals stay calm and think clearly under stress.

Finally, NPY has an antidepressant effect. Under stress conditions, it can relieve stress-induced depressive symptoms by regulating the release of neurotransmitters.

At the same time, the body, when stimulated to a certain extent, will also speed up the synthesis of glucocorticoids (such as cortisol). Under stress, the secretion of cortisol will increase sharply, possibly up to ten times the usual level. Under stress, cortisol increases blood sugar levels by promoting gluconeogenesis (converting non-sugar substances into glucose) and inhibiting glucose uptake. This provides more energy for the brain and muscles to cope with stressful situations.

Furthermore, under stress, cortisol can suppress certain functions of the immune system and reduce inflammatory responses. This helps prevent the body from overreacting during stress and protects body tissues from damage. In addition, under stress, cortisol increases the breakdown of proteins and fats to provide energy sources. This metabolic regulation ensures that the body has sufficient energy reserves when facing stress.

If we dig deeper, we have to mention that cortisol helps maintain and regulate blood pressure by enhancing the vascular response to adrenaline and norepinephrine, ensuring that blood can circulate effectively under stress. At the same time, cortisol also plays a role in regulating electrolyte balance, helping to maintain the balance of sodium and water in the body, which is essential for maintaining normal blood pressure and cardiovascular function.

Under stress, cortisol can temporarily inhibit reproductive function and reduce the secretion of reproductive hormones. This is an evolutionary mechanism that ensures that resources are allocated first to survival-related functions in critical situations, just like going to the toilet always takes precedence over doing a handstand on the balcony while playing Switch.

Excessive levels of cortisol can have similar negative effects as NPY. Cortisol regulates mood and memory by affecting neural pathways in the brain. In short-term stressful situations, cortisol can improve memory and concentration, but chronically high levels of cortisol can lead to memory loss and mood problems, such as anxiety and depression.

In addition, there is another key chemical, adrenaline (Epinephrine), which is also secreted in large quantities during stress.

Adrenaline can speed up breathing, heartbeat and blood flow, providing the body with more energy and making the body react more quickly. In extremely critical situations, the release of adrenaline will increase significantly. This hormone can increase the contractility of the heart, cause the blood vessels of the heart, liver and muscles to dilate, and the blood vessels of the skin and mucous membranes to constrict, thereby providing more blood flow to key parts of the body in an attempt to save life through this last effort.

Adrenaline is the most direct and powerful drug that can improve the physical functions of people in dangerous situations. The famous hunter Geralt of Rivia loved this drug and said that it saved his life many times.

Since everyone in the ancient dynasty had a basic understanding of this thing, I will not elaborate on it.

The ancient science knowledge class is over! See you next time when you need us~

Su Feiran desperately treaded the water, carrying Wang Qian on her back and floating up quickly. Unlike when she came here, she felt as if she had endless energy, as if she was blessed by Hercules.

She used this strength to leap towards the light in one breath!

Wow!

The two people who stayed on the shore looked at Su Feiran showing his head with the unconscious Wang Qian on his side, and they couldn't help but cover their mouths in surprise.

Lin Xiuqing took two steps back in shock, gasping for breath while holding his chest. Yu Xiao was also so frightened that her face turned pale, and she quickly shouted to Su Feiran: "Master, hold on a little longer! The imperial physician will be here soon!"

Su Feiran finally breathed in fresh air, and felt relieved. The fatigue instantly filled his body from head to toes. But the long march was not over yet. Su Feiran not only had to pull Wang Qian out of the water, but also had to pull her ashore.

Su Feiran bit her lips hard, and the smell of blood in her mouth diluted her fatigue. She lifted Wang Qian's body and swam towards the shore with difficulty.

Every inch of progress was a huge test of her physical strength, but she dared not stop because she was responsible for a life.

Su Feiran swam towards the shore until he was close enough to it, and then Lin Xiuqing and Yu Xiao came forward to help, and pulled Su Feiran and Wang Qian ashore.

Seeing Yuxiao's concerned look, Su Feiran shook her head. She didn't have the strength to speak, and sat on the ground with her legs limp. She pointed at Wang Qian on the ground with her last bit of strength, signaling the two to take care of her first.

Yuxiao nodded, and looked at Wang Qian with Lin Xiuqing. Her lips and skin were very pale. Lin Xiuqing tried to check her breathing, but was so scared that he withdrew his hand and sighed softly.

"No way..." Su Feiran was completely hopeless.

Yu Xiao refused to give up and denied: "My father was born in a fishing village. He told me that if people who fell into the water and lost their breath were rescued in time, they could regain their life."

Su Feiran's mind moved - cardiopulmonary resuscitation!

"Yuxiao, just do as I say." Su Feiran said decisively.

Yu Xiao nodded: "Okay!"