New answers tagged

-1

I thought it was about 5km, pregnant women are unable to function at this height & red blood cells are so thick the heart is pumping soup.


1

No, absence of an stimulating substance is not appropriate to consider as inhibition. To see why, consider a situation where there are two such substances, substance A and substance B, which can both stimulate protein P (many such relations exist). If you add only substance B, then protein P will be stimulated. Since P is being stimulated in this case, it ...


0

Suppose that someone has completely lost the ability to voluntarily control his/her muscles due to the destruction of the brain's dopaminergic neurons in the substania nigra This is not correct. The substantia nigra plays an important role in both reward and movement. The degeneration of dopaminergic neurons in the substantia in Parkinson’s disease leads to ...


0

No it would eliminate only fine motor control; Patients with parkinsonism are not paralysed as much as loss of fine movement they have spastic movement...


-1

Darker skin, as opposed to common belief, probably did not develop as cancer protection. Cancer is usually something that attacks the body in a subsequent life. Even pale individuals under the sun are likely to survive far beyond their reproductive era before they are wiped off by skin cancer. Instead, it is believed that folic acid manufacturing is the ...


3

Food only partially buffers the pH of stomach contents and acid is not the only esophageal irritant present in the stomach. The goal, therefore, is to have as little as possible present in the stomach when lying down (supine) to reduce risk of gastro-esophageal reflux (GER) through the lower esophageal sphincter (LES) into the esophagus. Avoiding meals just ...


3

During development of the brain neurons undergo several steps of differentiation. They transition from neuronal progenitors to mature neurons, resulting in different types of neurons, characterized most prominently by their primary neurotransmitter. During the differentiation, different genes are expressed, which in research is used to label specific cell ...


0

"Constitutional" refers to the physical state of the concerned individual (Merriam-Webster). In biology, it most probably means a trait that is not pathological or environment induced. This is in the context of size of babies: Small for gestational age (SGA) can occur following a pathological process or may represent constitutionally small fetuses. ...


0

The OP might be asking about what is called mirror touch synaesthesia Like all synaesthesia [also spelled synesthesia] this is a new area of research. I have synaesthesia but I don't have this kind. Most researchers study "grapheme synaeshesia" grapheme because that is easier to make into empirical results. Dr Anina Rich studies synaesthesia. She might ...


3

No. The heritable immunity you are describing is due to selective pressures on populations where individuals with certain alleles have a survival advantage in the face of particular pathogens. If a population is exposed to deadly diseases like smallpox and there are some individuals in the population who are more resistant, those individuals are more likely ...


-3

There are only two substances absorbed in the stomach that go directly to the brain: water and alcohol. As soon as the water hits your stomach, it’s absorbed and gets to the brain. Then the brain signals that the drout is over so there is no need to hold onto extra water.


3

Depends highly on the amount of steam in the room. Most if the heat energy does not come from the air, but from the steam that is condensing on your skin. I can tell from my own experience that I regularly spend 20-30 minutes in 80c sauna while pouring more water to the stove every few minutes without getting too uncomfortable (as long as I have water to ...


1

{4} has a similar micrograph as yours but with some labels: with the caption: Figure 1.2: Tendon microstructure of healthy tendons: nuclei of tenocytes are darker in color and vascularization does not disrupt collagen arrays. arrays http://www.onlineveterinaryanatomy.net/content/tendon-histology-labelled (mirror) {5} presents both a longitudinal (a) ...


Top 50 recent answers are included