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What is the smallest muscle in the human body?

The stapedius muscle is located in the ear and blocks excessively loud noises, according to Timothy Hain, MD. The doctor goes on to say that an overactive stapedius muscle can result in hearing problems, such as tinnitus. Also, according to Dr. Hain, one of the main functions of the stapedius muscle is to muffle the noise caused by chewing. Without the stapedius muscle and its automatic reflex, chewing would be unbearably loud for humans, he claims.

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What is the difference between the upper and lower epidermis?

The epidermis consists of a very thin layer of skin. This layer is responsible for making new skin cells, producing melanin or color and protecting the body, as the American Academy of Dermatology reports. At the very bottom or lower portion of the epidermis, new skin cells are made. The top or surface of the epidermis is comprised of special cells that protect the body and ward off infection.\nThe second layer of skin, the dermis, is thicker than the epidermis. This layer is responsible for making sweat, growing hair and making oil. This portion of the skin is also home to nerve endings and b..

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Can a mole see?

However, moles overcome their poor eyesight with acute movement and smell detection through bare skin patches covered with small, sensitive pimple-like protrusions on their muzzles. Moles eat their bodies' weight worth of earthworms each day, although they also like beetles and small mice. Moles collect earthworms, and chew off the front end of each earthworm to prevent the worms from escaping; this ensures a fresh food supply throughout the winter.

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What is DC and AC resistance?

The longer a wire or the material being used to conduct the electricity the higher the resistance will be. In AC current, when it passes through material, it creates a magnetic field across the material. This opposes the flow of current in addition to the natural resistance that might be produced by the material it is passing through. This is referred to as inductance, but is an action or state that only occurs in the AC currents. A DC current has a lower resistance than an AC current because the only factor that resists in a DC set up is the wire or material that the current is passing throug..

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Why is there an asteroid belt between Mars and Jupiter?

The asteroid belt encompasses an area between 2 and 4 astronomical units from the Sun. The belt was formed 4.6 million years ago, when either the gravitational stress of Jupiter or a collision likely destroyed a planet or protoplanet roughly half the size of the Moon. Most asteroids found in the belt have an orbital period of between three and six years. Objects in the belt range in size from pebbles to the asteroid Ceres, which is approximately 600 miles in diameter.\nWhile most asteroids are located within the belt, they can be found scattered throughout the solar system. Asteroids that appr..

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What is the most stable state of an atom called?

The opposite of a ground-state atom is an excited-state atom. This refers to any state of the atom that has energy greater than the ground state. The total energy of the electrons in an excited-state atom can be lowered by moving electrons into a lower-energy orbital.\nAn atom does not usually stay in an excited state for long. An excited atom emits energy, such as photons, to reduce the overall atomic energy to a lower state. This process is called decay and is the opposite of excitation.

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What are the producers of a wetland habitat?

The types of producers in a wetland depend largely on the drainage, water and soil of the area. For instance, the producers in swamp wetlands require fresh water and include swamp she-oak, mahogany and swam paperbark trees. There are ferns and a variety of shrubs, such as tea-trees and swamp banksia. Producers in estuaries need brackish or slightly salty water and include mangroves.\nSalt marshes, another type of wetland, contain plants that are adapted to saltwater, such as pigface. Pigface is a species of coastal plants with fleshy leaves. The round-leaved pig face is a succulent plant found..

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Where can you find free medical illustrations?

Medical illustration providers such as the Trauma Image Database, the Cell Image Library and the American Society of Hematology only offer images specific to the respective specialties of these organizations. Other organizations including Anatomy Atlases and the Centers for Disease Control and Prevention have large image libraries with illustrations pertinent to a variety of medical disciplines. The image libraries include photographs, illustrations and videos.\nAccording to the resource list compiled by the University of South Carolina, online medical image collections such as Yottalook, WebP..

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What is the temperate grasslands food chain?

According to Georgia State University's HyperPhysics, an autotroph, or producer, is an organism that produces food using energy sources such as the sun, soil or surrounding nutrients to survive. Grass and trees are examples of autotrophs. The food chain begins when insects and other animals eat these producers. The birds, small animals and omnivores that consume producers are called heterotrophs.\nGrasslands are located on most of the continents. Each region has a unique variety of flora and fauna that builds the food chain. Temperate grasslands are comprised of flat plains with tall gras..

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What is the function of the renal artery?

The renal artery carries blood to the kidneys from the abdominal aorta. This blood comes directly from the heart and is sent to the kidneys to be filtered before it passes through the rest of the body. Up to one-third of the total cardiac output per heartbeat is sent to the renal arteries to be filtered by the kidneys. Each kidney has one renal artery that supplies it with blood. The filtered blood then can exit the renal vein.

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