New answers tagged

0

(I think I am correct) You can't live without your heart, both kidneys, your whole brain, both of your lungs.


-1

Seeing how the Ciliary Muscle (FAT/contracted muscle) can cause for loosened eye lense ligaments (near vision) is what you need to grasp. This video Best Shows WHY and HOW the contracted (FAT) muscle produces this: "accomodation" https://www.youtube.com/watch?v=p_xLO7yxgOk When the Ciliary Muscle contract (close vision) the ligaments holding the eye lens ...


6

Methanol is rapidly absorbed not only after oral ingestion but by inhalation or after cutaneous exposure and becomes oxidised in the liver to formaldehyde and to formic acid, metabolites which are more toxic than methanol itself and which inhibit mitochondrial ATP production. Histopathologically, circumscribed myelin damage behind the lamina ...


2

Your question spans two activities of T-cells that are related to each other: migration and activation. T-cells that usually stay in lymphoid organs migrate to non-lymphoid organs with different mechanisms for each T-cell subtype. When migrated to non-lymphoid organ, the T-cells move through the organ looking for infected cells. Migration As you can see in ...


-3

T-cell does not inspect any cell until the cell shows a piece of the "non-self" antigen on it by the MHC. The helper T-cell connects with the antigen which is on the cell's surface. The T-cell sorts the cytokines that activate the cytotoxic T-cell to divide and form a colony of cytotoxic cells. The colony of cytotoxic cells then attack the "non-self" ...


1

What is anorexia nervosa? Generally, it is an eating disorder which is characterised by a tremendous fear of food as well as an extreme weight loss. Patients with anorexia nervosa do not necessarily lose their appetite but rather obsessively control and restrict their food intake. Anorexia Nervosa as an inherited disease/genetic factors There has ...


-1

I think the answers above have covered the basic breakdown of how our body regulates blood pH and why it is clearly misleading to propose that drinking lemon juice can have a positive effect on acidosis mediated illnesses. What I would like to add from a more microbial perspective is that a paper by Yoshiake Miyake on the Metabolism of Antioxidant in Lemon ...


-1

You're very much out of range of Aedes Aegypti, which is the primary carrier of Zika. Albocitus is a much more theoretical carrier, whose potential for spreading disease is much less. There have been no locally acquired cases in the mainland US this year. The odds of a New Yorker being the first to catch it are ridiculously long.


2

Actually, the body goes into the fasting state about eight hours or so after the last meal, usually when the guy finishes absorbing nutrients from the food. Normally, body glucose, which is stored in your liver and muscles, is your main source of energy. When in a fasting state, your body uses up the glucose that you have stored to provide energy. If you ...


2

The calorie is a unit of energy. Our body uses the energy found in food to create ATP (a molecule that is handy to deal with energy) with the help of oxygen (that we breath in). ATP can then be used for plenty of tasks such as importing ions through a cellular membrane or more ultimately walking, talking, warming up your body, etc... Saying that some food ...


1

I took a 30 second look at the book you mentioned. The authors just made this up, just like 95% of the book. The authors are not wrong, they didn't want to write something useful and made a mistake, they're just bullshitting: They're making stuff up, letting it sound a tiny bit scientific and try to sell a lot of books. If you want to know more about ...


2

After a lot of research, I've finally found an answer. In the case of humans, it is practically impossible. See this article from wikipedia: During gestation, the cells of the primordial gonad that lie along the urogenital ridge are in a bipotential state, meaning they possess the ability to become either male cells (Sertoli and Leydig cells) or female ...


7

Homo sapiens / Homo sapiens sapiens Human being, in the popular culture generally refers to modern humans, called either Homo sapiens or Homo sapiens sapiens. The existence of the two names will make sense when talking about the Neanderthals. In the term Homo sapiens, Homo indicates the genus and sapiens indicates the species. In the term Homo sapiens ...


1

On http://www.lenntech.com/periodic-chart-elements/human-body.htmlanguage, you find 118 elements sorted by the percent of appearance in the human body, starting with oxygen (65%) down to "very low traces of lead". There are a lot of elements which can't be found, including Osmium. You can sort the table by other orders like name, symbol, mass, and others.


0

Perhaps this is more of a chemistry question than a biology question? Our body doesn't make use of all elements, as far as we know, (somewhere between 20 and 29 elements have been suggested to have some use by mammals) but it probably contains every naturally occurring element in some tiny concentration, if you measure with sufficient sensitivity. Barring ...


-1

Terminology is what is holding you back. What chromosome implies depends on context, i.e. is it replicated or not. In Meiosis. Gametes arise from Germline cells that have 23 PAIRS of chromosomes. That means, that while there are 23 different chromosomes they come in doubles/pairs. This is the typical X like shape we think about when we hear chromosomes. ...


-2

I refer the honorable gentlemen to James Harriet. He reports discovering by accident by ending the pain he was in some cases able to reverse the pathology by ending the pain with anesthetic drugs, thus allowing the body's natural healing abilities to take over. He first discovered it in a sheep by accident (insufficient dose to put it down) and later used ...


0

Roller coasters release adrenaline, a chemical that is released when your body thinks it's in danger. It strengthens your body so that you could fight of flee. However, since a roller coaster is not actually dangerous, your body just feels strong and good. Your body also releases endorphins during roller coaster which makes you feel good.


2

For babies there is certainly a formula available for a complete menu for survival: formula* Here are the nutrition facts from Nestlé's "Good Start": Formula nutrition facts. source: Nestlé Comparable lists are available for people that cannot eat normally (e.g. people in a comatose state) and are fed enteral or parenteral nutrition. *. Remember ...


6

There are two different aspects to or drivers of thirst, osmolality and hypovolemia, with plasma osmolality elevation being the more potent stimulus of thirst. As stated by @arboviral (and supported by his link), not a lot is known about the mechanisms of immediate thirst satiety. Much more is known about the mechanisms causing thirst, and the mechanisms of ...


-3

I'd say the answer is easy. Since the whole body is one body all you need is the change of of water saturation in a part of you to determine / extrapolate how much water has been ingested. We all came from the water and are mostly made out of water. So it's not like water is a foreign substance and we needs special receptors in order to determine water ...


3

Satiety is divided into pre-absorption and post-absorption - the mechanism you're asking about is preabsorption satiety, which as you point out occurs long before the water can be absorbed into the bloodstream and appears to be remarkably accurate. The receptors and underlying mechanisms of pre-absorption satiety are not fully known but are thought likely to ...


0

At room temperature, Nail bed . It's not about survival. Those cells have a low growth rate. Other cells in bones may 'live' longer but harvesting bone marrow in decaying animals has not been done. If you freeze cells, they can last decades.



Top 50 recent answers are included