The nervous system works because neurons communicate across connections called synapses. They "talk" when calcium ions flow through channels into "active zones" that are loaded with vesicles carrying molecular messages. The ...
Jul 20, 2022
0
88
Several minor cannabinoids contained in the cannabis plant "strongly inhibit" the activation of human immune cells that lead to chronic inflammation, according to physiologists at The Queen's Medical Center and University ...
Jul 19, 2022
0
12
Mitochondria are self-contained organelles (they possess their own mini-chromosome and DNA) residing within cells and are charged with the job of generating the chemical energy needed to fuel functions essential to life and ...
Jul 13, 2022
0
188
Let's think for a second about thought—specifically, the physics of neurons in the brain.
Jun 20, 2022
0
118
Scientists have long known that learning requires the flow of calcium into and out of brain cells. But researchers at Columbia's Zuckerman Institute have now discovered that floods of calcium originating from within neurons ...
Mar 17, 2022
0
132
Heart failure, which is often the final outcome of various cardiovascular diseases, has a poor prognosis. It is known that abnormalities in cardiomyocyte intracellular calcium ion regulation are deeply involved in the pathology ...
Dec 21, 2021
0
17
A defective heart valve is the second most common form of heart disease. Most cases involve a narrowed aortic valve, but often the mitral valve can also be affected. Prostheses significantly increase the life expectancy of ...
Nov 02, 2021
0
1
Cancer treatments necessarily target unchecked cell growth, and selectively kill cancer cells while sparing normal cells and avoiding general toxicity in the human body.
Oct 20, 2021
0
151
Researchers at Linköping University, Sweden, have made several discoveries on the functioning mechanisms of the inner hair cells of the ear, which convert sounds into nerve signals that are processed in the brain. The results, ...
May 10, 2021
0
279
Just as people keep their houses clean and clutter under control, a crew of cells in the body is in charge of clearing the waste the body generates, including dying cells. The housekeeping cells remove unwanted material by ...
May 06, 2021
0
4
Calcium (pronounced /ˈkælsiəm/) is the chemical element with the symbol Ca and atomic number 20. It has an atomic mass of 40.078 amu. Calcium is a soft grey alkaline earth metal, and is the fifth most abundant element by mass in the Earth's crust. Calcium is also the fifth most abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.
Calcium is essential for living organisms, particularly in cell physiology, where movement of the calcium ion Ca2+ into and out of the cytoplasm functions as a signal for many cellular processes. As a major material used in mineralization of bones and shells, calcium is the most abundant metal by mass in many animals.
This text uses material from Wikipedia, licensed under CC BY-SA
