How does thermal convection occur in a fluid?

When two systems come into contact, heat spreads spontaneously from the system with the higher temperature to the system with the lower temperature until thermal equilibrium is reached, one of the components of the state of thermodynamic equilibrium. The same happens within the same system in which there is a thermal gradient, the heat will […]

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How does the vasomotor center work?

The vasomotor center is a diffuse area of ​​the medulla oblongatain the brainstem, composed of a neural network that regulates blood pressure and other homeostatic processes along with the heart center and the respiratory center. It exerts its action through the Autonomic Nervous System and has two separate areas, a vasopressor area and a vasodepressor […]

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How fast is the Earth moving through space?

We all know the feeling of standing on the earth’s surface, of perceiving ourselves in a “steady” state. We just stop walking. But the theory of relativity taught us one very important thing, everything is relative to the frame of reference with which to compare. And it turns out that there is no universal reference, […]

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How is amethyst formed?

Amethyst is a gem that is formed by introduction of iron in quartz crystalsa mineral composed of silica (SiOtwo or silicon oxide). The general formula of amethyst is SiOtwo::Faith3+presents a violet color and its name comes from the Greek ἀμέθυστος (amethystos“not intoxicated”), a name derived from its use as an amulet against various types of […]

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How is an igloo built?

The igloo or “snow house” (from the Inuktitut iglu / ᐃᒡᓗ, which means house or building), is a traditional inuit construction Canada’s central arctic and the Thule region of Greenland. They are built when snow can be easily compacted and are used for a variety of purposes, from temporary hunting shelters to permanent homes, although […]

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How is electricity generated from running water?

The electricity generated using hydropower is based on the same concept as dynamos and the phenomenon of electromagnetic induction. Hydraulic energy, also called hydric energy or hydroenergy, is obtained by taking advantage of the kinetic and potential energy of a stream or waterfall. It is considered a form of electricity production that can be sustainable […]

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How is Borreliosis or Lyme disease transmitted?

The borreliosis It is an infectious disease caused by bacterium Borrelia burgdorferi. The bacterium is transmitted by tick bites infected and produces fever, headache, fatigue and skin rashes. Also known as Lyme’s desease, as this is the city where it was discovered. The first cases diagnosed as borreliosis occurred between 1975 and 1977 in Old […]

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How is oxygen absorbed in the lungs?

The gas exchange between the blood of animals and the external environment is the process known as hematosis. In the human being it takes place in the pulmonary alveolithe terminal structures of the bronchial tree where oxygen from the air passes into the bloodstream and carbon dioxide is expelled into the air from the blood. […]

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How is scabies treated?

scabies is one parasitic infestation on the skin produced by Mites, is a type of acarodermatitis. Scabies has a cosmopolitan and multispecies distribution, it occurs throughout the world and in many types of mammals, not only in humans. Human scabies, also known as scabiesis produced in a specific way by the species Sarcoptes scabiei. It […]

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How is the cell membrane synthesized?

The cellular membranealso known as cytoplasmic membrane or plasmalemmaIt is the cover that separates the inside and outside of the cell. It is made up of a phospholipid double layer in which other types of lipids, cholesterol, various types of proteins and also oligosaccharides are inserted. Inside the cell there are other structures with a […]

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How is the blood-brain barrier formed?

The blood-brain barrier is a barrier made up of various structures that separates extracellular fluid from blood circulation in the central nervous system (CNS), including the brain and spinal cord. The blood-brain barrier controls the passage of substances thanks to a highly selective permeability and is often regarded as part of the neuroimmune system. The […]

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How is the life cycle of butterflies?

Butterflies are a group of glossed lepidoptera insects (class insectorder Lepidopterasuborder Glossata) belonging to the Super family Papilionoidea (papillionoids). Previously, diurnal butterflies formed the suborder Rhopalocera (Palocera), in contrast to the nocturnal butterflies (moths, falenas, etc.) that formed the suborder heterocerabut today these suborders are considered obsolete. Currently, the so-called true butterflies are included in […]

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