The bone marrow is the site of neutrophil production, a process that is regulated by the cytokine granulocyte colony-stimulating factor (G-CSF). Mature neutrophils are continually released into the circulation, with an estimated 1011 neutrophils exiting the bone marrow daily under basal conditions. What is the origin of neutrophil? Neutrophils originateRead More →
Athletic performance is a complex trait that is influenced by both genetic and environmental factors. Many physical traits help determine an individual’s athletic ability, primarily the strength of muscles used for movement (skeletal muscles ) and the predominant type of fibers that compose them. Can you become an athlete laterRead More →
In Russia, Cyrillic was first written in the early Middle Ages in clear-cut, legible ustav (large letters). Later a succession of cursive forms developed. In the early eighteenth century, under Peter the Great, the forms of letters were simplified and regularized, with some appropriate only to Greek being removed. WhenRead More →
Organisms like bread mold (Rhizopus) form spores in large numbers. … Spore formation in Rhizopus takes place inside its hyphae. Which part of the fungi produces spores? A mushroom is a fruiting body, which is the part of the fungus that produces spores. The spores are the basic reproductive unitsRead More →
Urticaria occurs when a trigger causes high levels of histamine and other chemical messengers to be released in the skin. These substances cause the blood vessels in the affected area of skin to open up (often resulting in redness or pinkness) and become leaky. Is cholinergic urticaria caused by stress?Read More →
An etiologic diagnosis is very important because it can lead to initiation of a specific therapy that may markedly improve the long-term developmental outcome. In fact, some children with infantile spasms may ultimately lead normal lives, but only if they are diagnosed and treated correctly. What happens if infantile spasmsRead More →
From 1954 to 1957, Soviet rocket designer Sergei Korolëv headed development of the R-7, the world’s first ICBM. Successfully flight tested in August 1957, the R-7 missile was powerful enough to launch a nuclear warhead against the United States or to hurl a spacecraft into orbit. What was the UnitedRead More →
Scholasticism is a Medieval school of philosophy (or, perhaps more accurately, a method of learning) taught by the academics of medieval universities and cathedrals in the period from the 12th to 16th Century. What is scholasticism in world history? Scholasticism, the philosophical systems and speculative tendencies of various medieval ChristianRead More →
Farmers were saved from the backbreaking chore of slinging hay bales in the 1960s, when Iowa State agricultural engineering professor Wesley Buchele and a group of student researchers invented a baler that produced large, round bales that could be moved by tractor. When did farmers start making round bales? ThoseRead More →
Intense itching is the main symptom of cholestasis of pregnancy. There is no rash. Most women feel itchy on the palms of their hands or the soles of their feet, but some women feel itchy everywhere. The itching is often worse at night and may be so bothersome that youRead More →