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How do I describe a neuromuscular junction?

According to IvyRose Holistic, a neuromuscular junction consists of the axon terminal of a motor neuron and the motor end plate of a muscle fiber. An axon is the long process of a neuron. As the axon enters a muscle, it forms branches that are referred to as axon terminals. A synaptic end bulb is located at the end of each axon terminal. The end bulbs contain synaptic vesicles, which contain a neurotransmitter called acetylcholine, or ACh.\nA neuromuscular junction also contains a synaptic cleft, which is the area between the sarcolemma and axon terminal. The sarcolemma is the plasma membrane ..

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How long do fingerprints stay on objects?

In some instances, fingerprints have been discovered on objects that have not been disturbed for more than 40 years. Sometimes prints cannot be not found on an object or surface that was recently tampered with as most prints are removed when the surface is cleaned. As of 2014, it is also not possible to determine the age of a latent print with scientific methods without knowing when a surface was last completely cleaned, according to the South Dakota Division of Criminal Investigation.

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How do I create a project about wheels reducing friction for a science fair?

A perfectly rigid wheel would be in contact with a surface on a single line, effectively making the contact area between the wheel and the surface zero. Because there are no perfectly rigid wheels, however, the contact area, and consequently the friction between the wheel and the surface, is a reduced, but always nonzero, value. The frictional force that is generated when a body moves against a rough surface is higher than that generated by a body which is moving against a smooth one. To add another layer of depth to a science fair project, this effect could be used to create another exhibit w..

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What makes metal rust?

Iron is the metal most commonly associated with rust. Oxidated iron is called hydrated iron oxide, and it has the burnt orange color most commonly associated with rust. Copper also oxidizes, but the product is known as patina instead of rust; it takes on a green color rather than the orange associated with rusted iron. Aluminum, on the other hand, does not rust because its surface is made up of a natural layer of aluminum oxide, which prevents oxidation in the metal.

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How do you determine gallons per minute when measuring flow rate?

Using the method outlined by Advanced Water Systems, if it takes five minutes to fill a five-gallon bucket, then the flow rate is obviously five gallons per minute. If it takes 45 seconds to fill the same bucket, then the flow rate is 60 seconds divided by 45 seconds, times five gallons, equaling 6.6 gallons per minute.\nOn About.com, Bob Formisano writes that measuring the flow rate of a faucet or shower head can be done by placing a container under the fixture and collecting the water for ten seconds; after ten seconds, measure the amount of water in the container and convert the measurement..

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What topics are covered when you study anatomy and physiology?

Anatomy and physiology courses may cover cell structure and function, how organs develop from cells into tissue, and how the organs then work together to support one another, as detailed on Brown University's website. Additional study topics include the disease process, its impact on the body's function and structure, and the impact disease has on societies and populations.\nSome anatomy and physiology courses are taught separately, as shown on the Massachusetts Institute of Technology website. For example, topics covered in standalone human physiology courses may include the molecul..

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What is a process that does not require oxygen?

Because there was very little oxygen present when the first living cells appeared on Earth, most ancient organisms produced energy through anaerobic respiration. It was only after the first plants produced enough oxygen for it to build up in the atmosphere that the more efficient process of aerobic respiration became prevalent. There are still many anaerobic bacteria on the earth, and anaerobic respiration occurs in many places when oxygen is not available.

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What is the major atmospheric by-product of photosynthesis?

Photosynthesis is one of the most important processes for the propagation of carbon-based life. It is responsible for a sizable percentage of the oxygen in Earth's atmosphere, it is a process by which inorganic carbon-based compounds (such as CO2) can be converted into organic compounds (such as sugars), and is the source of much of the energy necessary for life on Earth.

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How do electric cars help the environment?

While electric cars do give off global warming emissions, they don't give off as many as vehicles that run purely off of gasoline when charged from the electricity grid. The amount of emissions an electric vehicle gives off depends on the blend of energy sources channeling through an area's electricity grid.\nIn 2014, the Union of Concerned Scientists reported that the driver of an electric vehicle could save an estimated $13,000 on the cost of fuel in addition to using fewer than roughly 6,100 gallons of gasoline over the life of an electric vehicle, when compared to a compact car. ..

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What are the disadvantages of solar energy?

Solar panels convert solar energy to electricity. They use various chemicals that normally do not cause problems due to the process manufacturers use to seal them to prevent leaks. However, damage during use has the potential to release molten salts, oils and other hazardous waste into the environment. Similarly, when the panels are no longer usable improper disposal releases these chemicals into the environment.\nThe nature of solar panels requires that they be fairly large, in order to produce a significant amount of energy. Installing banks of solar panels to produce electricity on a commer..

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