A new study shows how neurochemicals affect fMRI readings
The brain is an incredibly complex and active organ that uses electricity and chemicals to transmit and receive signals between its sub-regions.
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The brain is an incredibly complex and active organ that uses electricity and chemicals to transmit and receive signals between its sub-regions.
11 hours ago
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Researchers at Weill Cornell Medicine have performed the most comprehensive analysis to date of cancer of the ureters or the urine-collection cavities in the kidney, known as upper tract urothelial carcinoma (UTUC). The study, ...
16 hours ago
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Researchers have identified a new mediator responsible for altering fear memories. This discovery could contribute to the creation of new and more effective therapies for the treatment of anxiety disorders, one of the most ...
16 hours ago
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A new study has discovered that a type of bacteria commonly found in the body, which usually does not pose problems for healthy people, plays a significant role in causing stomach cancer, the fifth most common cancer in the ...
18 hours ago
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An "anti-hunger" molecule produced after vigorous exercise is responsible for the moderate weight loss caused by the diabetes medication metformin, according to a new study in mice and humans. The molecule, lac-phe, was discovered ...
22 hours ago
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The MYCN oncoprotein (proteins related to the growth of cancer cells) plays a key role in starting, advancing and making it difficult to treat various human cancers. When MYCN is overactive, especially in high-risk neuroblastoma ...
Mar 15, 2024
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Researchers from Children's Hospital of Philadelphia (CHOP) identified a key metabolite in cells that helps direct immune responses and explains at a single cell level why immune cells that most efficiently recognize pathogens, ...
Mar 15, 2024
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Compared to adults, newborns are highly susceptible to infections and these infections can cause serious health complications and even death.
Mar 15, 2024
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T cells are often called "assassins" or "killers" because they can orchestrate and carry out missions to hunt down bacteria, viruses, and cancer cells throughout the body. Mighty as they may be, recent research has shown ...
Mar 15, 2024
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Making a personalized T cell therapy for cancer patients currently takes at least six months; scientists at the German Cancer Research Center (DKFZ) and the University Medical Center Mannheim have shown that the laborious ...
Mar 15, 2024
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The cell is the structural and functional unit of all known living organisms. It is the smallest unit of an organism that is classified as living, and is often called the building block of life. Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion or 1014 cells; a typical cell size is 10 µm; a typical cell mass is 1 nanogram.) The largest known cell is an unfertilized ostrich egg cell.
In 1835 before the final cell theory was developed, a Czech Jan Evangelista Purkyně observed small "granules" while looking at the plant tissue through a microscope. The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells. All cells come from preexisting cells. Vital functions of an organism occur within cells, and all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.
The word cell comes from the Latin cellula, meaning, a small room. The descriptive name for the smallest living biological structure was chosen by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.
This text uses material from Wikipedia, licensed under CC BY-SA