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Where is the liver located?

The liver is a large glandular organ that secretes chemicals that are transported throughout the body. The main chemical that the liver secretes is bile. This substance is necessary for fat digestion because bile salts break up fatty compounds into smaller compounds to make them more readily absorbed into the body. In addition to producing bile, the liver also detoxifies the blood, stores a few different vitamins and minerals, stores glucose and recycles old red blood cells.

What causes radioactivity?

Radioactivity is caused in the same way but appears in three different types: alpha, beta and gamma. In alpha decay, alpha particles are identical to helium nuclei, which are made of two protons and two neutrons bond together. Initially, the alpha particle escapes the nucleus of a parent atom and is further repelled from its sources by various processes of quantum mechanics. These processes change the original atom from an alpha particle into a different element, which lowers its mass and atomic numbers. Beta radioactivity occurs in two types. During the first type of decay, emissions occur fr..

What is compact bone tissue?

Compact bone is cylindrical in shape and filled with thousands of openings in which blood vessels and nerves carry oxygen and nutrients to the bone. Compact bone is so dense that it does not register pain. If a bone breaks, damaged nerve fibers send pain signals through the compact bone to the brain. The center of compact bone contains the medullary cavity, which protects spongy bone marrow.

What is the chemical formula for bauxite?

Bauxite frequently occurs in limestone and clay deposits. This igneous and sedimentary compound is classified as an ore rather than a mineral. It is not valued as a gemstone and has a dull luster and brittle quality; the coloration of bauxite ranges from gray and beige to white, yellow.and pink. Nonetheless, bauxite is important as a significant aluminum source. A town in Arkansas is even named for bauxite..

Where does a river start?

The first small streams that are formed as water collects and flows downhill are called gullies. Gullies come together to create larger streams. Streams continue flowing downhill, meeting at places called confluences. When two streams meet, the smaller stream is referred to as the tributary of the other stream. Eventually enough streams come together to form a river. The river continues to flow downhill until it flows into a lake, sea or ocean at its mouth, according to About.com.

What is the Lewis structure for ozone?

The arrangement of the dots, bonds and signs vary depending on the resonance form of ozone, written with the chemical formula O3. In the Lewis dot structure, each dot represents a valence electron, while each line represents a pair of bonded valence electrons. Two lines written together are called a double bond. Two dots together are also known as a lone pair.

How does altitude affect air pressure?

At higher altitudes, molecules in the air are less affected by gravity. This causes them to have less weight, facilitating their expansion. Molecules closer to the Earth's surface are pulled closer together due to gravity, which causes an increase in air pressure.\nMolecules at lower altitudes are compressed under those from higher altitudes, also leading to greater air pressure. Temperatures at high altitudes are lower than those at sea level due to the expansion and distance of air molecules from each other.

What is structural adaptation?

Structural adaptations are the result of the evolutionary process, which stems from the mutation of genes over time. Some mutations are of benefit to the organism while others are not. Creatures with beneficial adaptations, such as sharper teeth for a carnivore, for example, or a longer bill in a bird, are more likely to survive longer and breed successfully. The beneficial adaptations eventually spread throughout the gene pool of the species across thousands of years.The specific characteristics of each species are the result of structural adaptation. Some examples include:The duck has webbed..

What happens to air when it is heated?

Whether air expands or increases in pressure depends on whether it is restricted in any way from expanding. Expanding air also decreases in density. A sealed container of air cannot increase in volume when heated, so it only increases in pressure. Theoretically, in an unconstrained situation air only expands when heated, but in reality, since even surrounding air masses provide some resistance, an increase in temperature always creates at least a slight increase in pressure. A more significant example of both volume and pressure increasing would be a rubber balloon. Heating air in a balloon in..

How do you find the mass number?

Look at the periodic table to find the element in questionCheck out the periodic table to find the number of protons in the nucleus of the element you are studying. Find the atomic number next to the symbol for the element; this is the number of protons in the nucleus of an atom of this element. Remember that this number does not change.Check the number of neutrons in the atoms in questionLook at the problem you are studying; if you see a phrase such as "lithium-7," then the number 7 is the mass number of that particular isotope. Check for a number of neutrons present if that phrasing does not..

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