전체 글20 circadian rhythm and brain structure This study examines the relationship between daily (circadian) changes in steroid hormone levels and brain structure in a single human male subject who underwent frequent brain scans and hormone measurements over a month. Key findings include:Total brain volume, gray matter volume, and cortical thickness decreased from morning to evening, while cerebrospinal fluid and ventricle size increased.Th.. 2024. 10. 5. 대부분의 세로토닌은 장에서 만들어진다 It is true that the majority of serotonin in the body is produced in the gut. Around 90-95% of the body's serotonin is found in the digestive system, particularly in the intestines, where it plays a role in regulating bowel movements and function. This serotonin in the gut is produced by enterochromaffin cells. In contrast, the serotonin produced in the brain, which is synthesized by neurons, a.. 2024. 7. 30. intermittent fasting is better for males because women have more oxidative fibers (지근섬유) An oxidative fiber, also known as a slow-twitch muscle fiber or Type I muscle fiber, is a type of muscle fiber that is specialized for endurance and sustained activity. Here are the key characteristics of oxidative fibers:1. **Endurance**: These fibers are highly resistant to fatigue and are capable of sustaining prolonged, low-intensity activities.. 2024. 7. 24. in vivo vs in vitro In vitro: The term in vitro comes from the Latin "in glass." It refers to a medical study or experiment that is done in the laboratory within the confines of a test tube or laboratory dish. This means tissue, cells, or other parts of an organism are removed and placed in a laboratory dish. Researchers may use these samples to test the action of a drug or study a disease process. In vivo: The ter.. 2024. 7. 9. 이전 1 2 3 4 5 다음