Answer:
The human cell system has a pretty advanced and effective way of communication. This communication between cells, whether it be of a single system, or between systems, is carried out by chemical reactions and gradients, and also through the intercession of molecules known as neurotransmitters. This is the case of the nervous system and its means of communication.
When we talk about neurotransmitters (the messengers) and neuroreceptors (the gatekeepers that receive the message and produce a reaction), we are literally talking about communication in the nervous system.
There are two types of neuroreceptors for trasmitters: the ionotropic (ligand-gated ion channels) and the metabotropic (second-messenger gated receptors, or G-protein coupled receptors). While the first type depends entirely on the availability of a ligand that binds to the receptor to open up the influx of ions from outside and inside of the cell to create a gradient that will ensure a cell response, the second does not open any ion channels and literaly what it does is receive the message from a neurotransmitter, and through the G-protein bound to the receptor, once it gets the necessary message, detaches and carries out the information to the cell. This is broadly how neurotransmittion can be carried out in the nervous system.
Answer:
The correct answer is option B. "It disrupts a larger area and produces less oil than drilling".
Explanation:
Oil extraction from tar sands is an inefficient way of extracting oil from a mixture of oil, sand, clay and water. The oil extraction from tar sands requires a considerable amount of energy and water and generates more pollution than oil drilling. Another downside of this process is that it disrupts a larger area and produces less oil than drilling. It is estimates that to produce one barrel of oil, 2 tons of oil sand should be processed.
Las acciones humanas están alterando el delicado equilibrio ambiental. En consecuencia, yo recomendaría aplicar diferentes acciones a nivel individual para preservar nuestro planeta.
La contaminación de los ecosistemas terrestres y acuáticos está poniendo en grave peligro los ecosistemas del planeta, con lo cual es imperativo disminuir los niveles de contaminación.
Algunas de las acciones necesarias que pueden ser aplicadas a nivel individual con el fin de proteger nuestro planeta son la reducción de la contaminación mediante el ahorro de energía y la conservación de recursos naturales.
- La compra de productos ecológicos, la reducción del uso de materiales no biodegradables (por ejemplo, plásticos), el uso de medios de transporte público o la bicicleta, representan medidas contendientes a diminuir los niveles de contaminación.
- El reciclado de materiales puede también ayudar a ahorrar energía, con lo cual evitando la contaminación que resulta del proceso industrial de fabricación de manufacturas.
- Disminuir el uso de agua también es una medida para proteger nuestro planeta, ya que los organismos productores en un ecosistema (por ejemplo, las plantas) necesitan del agua para capturar y almacenar del carbono durante la fotosíntesis.
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Answer:
b Water the light energy (sunlight) extract the hydrogen atom from the Water
<span>The answer would be Cell specialization</span>
