动物造模 z-bo 2020-09-26 335

　　According to a new study, pain seems to prevent female mice from continuing to mate, but it does not prevent male mice from mating.

　　In this study, female mice feel pain and discomfort during mating, but male mice want to mate even when they are suffering. The researchers said the reason may be that male and female mice face different evolutionary pressures. They say about human sexual behavior, similar creatures, mechanisms rather than

　　Culture may be at work.

　　"Because they give birth and increase the costs associated with babies, they (female mice)-or at least their genes want them-may think they will ensure that they are in good condition. The author of the study and Jeff of Magill University in Canada Lee Mogil (maybe) “give birth to children and take care of them.” The pain may signal to female mice, “They may not be in a healthy state, and it may not be a good idea to have children now,” Mogil said. .

　　But, "For men, as long as you release sperm, your job is complete." Then, the man's health will not be affected, Mogil told Life Sciences. [Animal Mating: Seven Stories about Wildlife Pranks]

　　To test the motivation of the mice to mate, the researchers placed male and female mice in the mating room, and placed the females and females at obstacles including doors. Was separated. The doors are so small that a man cannot push them in. However, as long as women are willing, it is enough for women to break through the barriers to men. In this way, researchers can ensure that the mating behavior that occurs is initiated by the female. The researchers also tested the mating motivation of male mice and placed them in an inseparable room where the male mice could come into contact with female mice without restriction. Male and female mice test sex drive by injecting chemicals that cause inflammatory pain into their genitals and other parts of the body (such as hind legs, tail, and cheeks). When the researchers injected painkillers or libido enhancers into female mice, they would reverse the negative effects of pain on female mice's libido. The researchers pointed out that this finding may provide clues for the formation of female sexual impulses. Although some people believe that women's sexual desire (or lack) is mainly controlled by cultural expectations, this study shows that certain mechanisms of sexual behavior are derived from biology. .. Mugil said that this research may also help shed light on certain human health issues. In humans, loss of libido often occurs in patients suffering from chronic pain. He said that this animal experiment will help researchers better understand what it is. The researchers also tested two drugs used in mice as ribosome enhancers, apomorphine and melatonin II, and found that ribosomes can only increase when the mice are in pain. Mo Ji said: "Therefore, we believe this may help develop potential libido-enhancing drugs in the future."