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Há 23 horas · Serotonin is produced in the central nervous system (CNS), specifically in the brainstem's raphe nuclei, the skin's Merkel cells, pulmonary neuroendocrine cells and the tongue's taste receptor cells. Approximately 90% of the serotonin the human body produces is in the gastrointestinal tract 's enterochromaffin cells , where it regulates intestinal movements.
Há 23 horas · Anorexia nervosa is an eating disorder characterized by attempts to lose weight by way of starvation. A person with anorexia nervosa may exhibit a number of signs and symptoms, the type and severity of which may vary and be present but not readily apparent. [21]
Há 23 horas · Yemen (/ ˈ j ɛ m ən / ⓘ; Arabic: ٱلْيَمَنْ, romanized: al-Yaman), officially the Republic of Yemen, is a sovereign state in West Asia. Located in the southern Arabian Peninsula, it borders Saudi Arabia to the north, Oman to the northeast, and the Indian Ocean to the south, sharing maritime borders with Eritrea, Djibouti and Somalia across the Horn of Africa.
Há 23 horas · Delphinapterus leucas. ( Pallas, 1776) Beluga range. The beluga whale ( / bɪˈluːɡə /; [4] Delphinapterus leucas) is an Arctic and sub-Arctic cetacean. It is one of two members of the family Monodontidae, along with the narwhal, and the only member of the genus Delphinapterus. It is also known as the white whale, as it is the only cetacean ...
Há 23 horas · Worldwide, consumption is below recommendations according to a summary of more than one hundred studies that reported a median dietary intake of 6.2 mg per day for alpha-tocopherol. Of the many different forms of vitamin E, gamma-tocopherol ( γ-tocopherol ) is the most common form found in the North American diet, but alpha-tocopherol ( α-tocopherol ) is the most biologically active.
Há 23 horas · Depleted uranium ( DU; also referred to in the past as Q-metal, depletalloy or D-38) is uranium with a lower content of the fissile isotope 235 U than natural uranium. [2] Natural uranium contains about 0.72% 235 U, while the DU used by the U.S. Department of Defense contains 0.3% 235 U or less. The less radioactive and non-fissile 238 U ...
Há 23 horas · In Wikidata. An antibiotic is a type of antimicrobial substance active against bacteria. It is the most important type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention of such infections. [1] [2] They may either kill or inhibit the growth of bacteria.
