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How do the body's systems work together?

Another example of direct control via the nervous system involves the endocrine system. The University of Washington explains that the hypothalamus, a component of the brain, regulates and controls the pituitary gland, which produces hormones. Hormones themselves are a mechanism by which the body coordinates discrete systems, according to the BBC. For instance, when it is time for a person to exhibit secondary sexual characteristics, the body produces the appropriate hormones.\nControlling the body’s different systems helps achieve a consistent internal environment. This internal balance is ..

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How long does it take to get to the moon?

The shortest voyage of a spacecraft from Earth to the moon was the Luna I probe launched by the USSR in 1959. It reached Earth's natural satellite in approximately 36 hours. Luna I was a flyby mission only, and though it passed close to the moon, it did not enter its orbit. The longest trip to the moon took more than 13 months, accomplished by the European Space Agency's SMART-1 lunar probe in 2003, using a slow but extremely fuel efficient ion engine.

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How much is160 millimeters in inches?

There are 10 millimeters in a centimeter, so the equation for the conversion is x centimeters = (160 millimeters)(1 centimeter / 10 millimeters). In this case, 160 millimeters is equivalent to 16 centimeters. To convert 16 centimeters to inches, solve the equation 16 centimeters = (y inches) (2.54 centimeters / 1 inch). Rearranging the equation gives (16 centimeters)(1 inch / 2.54 centimeters) = y inches. The solution is y = 6.3 inches, thus completing the conversion.

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What is the hardest metal in the world?

All steel is a combination of iron and carbon, making it an alloy, which is any metal made of two or more elements heated together. All steels are an alloy but not all steel is alloy steel. Alloy steel requires iron, carbon and an additional third element to be called alloy steel. As well as increasing hardness, the process of alloying steel can increase its strength, toughness, resistance to corrosion and wear, hardness, and hot hardness.

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How is the molar mass of calcium hydroxide determined?

Calcium hydroxide is composed of one calcium atom, two oxygen atoms and two hydrogen atoms. The molar mass of calcium is 40 grams/mole, the molar mass of oxygen is 16 grams/mole and the molar mass of hydrogen is 1 gram/mole.\nA student must add all of these masses together to find the molar mass of calcium hydroxide, but also remember that there are two moles of oxygen and two moles of hydrogen in the compound.\nThe addition expression for the molar mass of calcium hydroxide is 40 grams/mole + 16 grams/mole + 16 grams/mole + 1 gram/mole + 1 gram/mole. The final product is 74 grams/mole, which ..

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What is the difference between glycerin and glycerol?

Glycerin is used extensively as a sweetener in chocolate filling, cookies and cakes. The colorless compound also serves as a humectant in soaps and lotions. Glycerin-based remedies treat such skin issues as rashes, acne, burns, psoriasis, bites and calluses. Glycerin soaps treat fungal and yeast infections and soften and ameliorate dry skin. Cough syrups and dietary supplements are also manufactured using glycerin. Adding the ingredient to weight-loss products prevents dehydration during exercise and enhances physical stamina. The ingredient is also added to toothpastes and mouthwashes to kill..

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Where does gas exchange in the lungs occur?

When an individual inhales oxygen from the environment, the oxygen enters the alveoli, causing the air in the alveoli to have a higher concentration of oxygen molecules than the air in the capillaries, notes Teach PE. Conversely, the air inside of the capillaries has a higher concentration of carbon dioxide molecules than the air inside of the alveoli following an inhalation. Via diffusion, some of the oxygen in the alveoli moves into the capillaries, while some of the carbon dioxide in the capillaries moves into the alveoli. Through the capillaries, the oxygen enters the person's bloodst..

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Where is the coldest place on Earth?

The coldest inhabited place on Earth is northeastern Siberia. Temperatures in two towns there can drop to below -90 F. Previously, the record for coldest place on Earth was set in 1983. The Russian Vostok Research Station located the cold temperature in East Antarctica. Scientists discovered that the temperature could reach as low as -128.6 F.

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Where can you find reliable information on solar energy?

Energy.gov includes articles about how solar energy works, information on companies working to solve solar industry challenges, and a solar IQ quiz. It also includes information about the SunShot Initiative, which is a funding program for research, marketing and manufacturing projects. The SunShot Initiative's goal is to make solar energy as cost-effective and accessible for consumers as electricity. Since its founding in February 2011, the SunShot Initiative has funded over 350 projects. These projects focused on photovoltaics and concentration of solar power, as well as systems integrat..

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How many chromosomes do animals have?

Chromosomes contain the DNA that gives each creature its unique characteristics. As the cells in an organism divide, they must keep the DNA replication intact. If there are variations, this can result in physical problems. For example, in humans, some cancers and one strain of leukemia are due to defective and broken chromosomes.While each species has its own specific number of chromosomes, all animals within that species will have exactly the same number. The shape of the chromosomes, however, is the same for all animals. It is linear, rather than circular, which is found in most types of bac..

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