1. Describe the principal organs responsible for producing ammonia and how ammonia is produced.
The major sites for the production of ammonia are the intestines, liver, and kidneys. It is biosynthesized through normal amino acid metabolism. The kidneys generate ammonia from glutamine by the actions of renal glutaminase and glutamate dehydrogenase. Ammonia is formed from urea by the action of bacterial urease in the lumen of the intestine, which is absorbed from the intestine by the portal vein. Amines obtained from diet and monoamines that serve as neurotransmitters or hormones can create ammonia by action of amine oxidase. In purine and pyrimidine catabolism, amino groups attached to the rings are released as ammonia.
2. Describe the mechanism by which a) mammals and b) fish remove ammonia from their bodies.
In mammals, ammonia excretion is unsuitable for disposing of nitrogenous waste on land. Mammals would have to urinate profusely to eliminate ammonia because of the toxicity, which would have to transport through the animal to be excreted in an extremely dilute solution. However...
To begin the lab, the variable treatment was prepared as the Loggerlite probe, used to later measure oxygen consumption, warmed up for approximately 10 minutes. To prepare the variable treatment, 200ml of Sodium and Ammo-lock water was measured in a container and a pre-prepared “tea bag” of tobacco was steeped in the room temperature treated water until a light yellow color was visible. After preparing the tobacco solution the preparation for the live goldfish began as two beakers were filled with 100 ml of treated water. Each beaker was weighed before addi...
Cu (aq) + 2NO3 (aq) + 2Na+ (aq) + 2OH- (aq) → Cu(OH)2 (s) + 2Na+ (aq) + 2NO3(aq)
...urkholder, J., Libra, B., Weyer, P., Heathcote, S., Kolpin, D., Thorne, P., et al. (2007). Impacts of waste from concentrated animal feeding operations on water quality. Environmental Health Perspectives, 11(2), 308–312. Retrieved from http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1817674/pdf/ehp0115-000308.pdf
On a cold, brisk Tuesday night, I attended the musical called Urinetown by Mark Hollmann and Greg Kotis. Urinetown was held in Rowand-Johnson Hall, at the Marian Gallaway Theatre. As I quickly walked in the entrance, I noticed that people were wearing casual attire. I gave the usher my ticket and walked to my seat. This time my seat was located up at the front so I had a great view of the stage. This particular theatre is my favorite, it is very open and you can see from every seat. This musical is known to be a musical comedy which deals with different themes, unique text, and extraordinary technical elements.
The human body gets most of the creatine it needs from food or dietary supplements. Creatine is easily absorbed from the intestinal tract into the bloodstream. Rich dietary sources of creatine include red muscle meats (beef) as well as fish. Creatine, however, is sensitive to heat and cooking, and the full amounts available in these food sources may be reduced during normal preparation. When dietary consumption is inadequate to meet the body's needs, a limited supply can be synthesized from the amino acids arginine, glycine and methionine. This creatine production occurs in the liver, pancreas and kidneys.
both these sysmtems work with one another to ensure that organs tissues in the body are supplied with an adequate amount of oxygen, and that carbon dioxide can be removed. firstly through the respiratory system, oxygen is inhaled through the nose and mouth, the oxygen is will travel down the trachea, the rachea divides into the bronchial tubes which enters the lungs. the bronchi divides into smaller branches known as the bronchioles, which have tiny air sacs called alveoli on the end. The alveoli is surrounded by thin blood capillaries, the wall of the capillaries is a single layer of cells. These thin walls allow gas exhange to take place. Oxygen will be diffused in the capillaries and will go into the red blood cells, where it will then be transported back to the heart. carbon dioxide will be diffused though the capillary walls into the alveoli, in an opposite path than oxygen. carbon dixoxide will be released in the lungs and through exhalation the carbon dioxide will be removed.The right atrium of the heart will supplied with de-oxygenated blood by the superior and inverior vena cava. The right atrium will pump the de-oxygenatd blood via the atrioventricualr valve until it reaches the right ventricle. the right ventricle will pump the de-oxygenated blood via the pulmonary semi-lunar valve, which will carry the blood pass through the pulmonary arteries unti it reaches the lungs. these veins from the lungs will carry oxygenated blood to the right atrium. the right atrium will now pump this fresh oxygenated blood past the aventricular valve so it can enter the left ventricle. the left ventricle the thickest out of the four chambers and will pump, so that oxygenated blood is supplied to all the organ tissues in the
Acid rain has been proven to have damage forests, fresh waters and soils, killing insect and aquatic life-forms. It also causes damage to buildings and impacts on human health. Many people do not know what acid rain actually is. Acid rain is any form of precipitation that is unusually acidic, low pH levels, higher than normal amounts of sulfuric and nitric acid, occurs naturally and from man made sources. Forms when gases react in the atmosphere with water, oxygen, and other chemicals (what is acid rain?). The only water that will not have some amount of acidity is pure water. Pure water has a pH of 7 which is neutral; regular, unpolluted rain water has a pH of around 5.6. The acidity in rain water comes from the presence of Carbon Dioxide, Nitrogen Oxide, and Sulfur Dioxide. CO2 reacts with water to form carbonic acid. Nitrogen and water react during lightning storms, forming Nitric Oxide. NO is then oxidized to form N02. The NO2 reacts with water to form nitric acid. Due to this, the pH is lowered to be slightly acidic (Acid Rain). Acid rain can occur naturally in the environment, but the problem occurs when human interaction is the cause of the acidic levels.
Anabolism builds up molecules similar to what can be found in food. It builds up, for example, carbohydrates and proteins. Like catabolism, anabolism also occurs in three stages. The first stage of anabolism creates the parts needed to create the molecules.
The Smell Scientist, by Megan Gilbert shared a great deal of information about the "smell scientist" Avery Gilbert who is considered an expert on smells. In Gilbert's article she shares a few things such as the overview of work of smell, how science is applied to the marketplace, how she came across her career path, a disaster project and advice for students. Beginning with the overview of work, she shares the the natural elements of biology, chemistry, and psychology and how they are all very involved in the development of our sense of smell. The next section of the article mentions how science is completely immersed into the marketplace. Scientists have to use different methods of consumer research such as "scientific methods and marketplace knowhow" in order to make
A huge fascination of arsenic started in the 19th century when people got word of a province in southeastern Austria where people ate arsenic. Women would eat arsenic to help gain weight and fix their complexion to look more beautiful and men would eat arsenic because they believed it helped them breath easier when they were climbing high up in the mountains. One doctor by the name of Dr. Robert Craig MacLagan, was particularly interested in this and visited the town to see for himself what was really occurring. He observed the people and tested their urine to prove that they have been indeed ingesting arsenic. He wrote about the things he witnessed in the Edinburgh Medical Journal. The men in the town would eat 6 grains/dose at least twice a week, sometimes eating it on their bread or just drinking it with their water. As a result many Victorians began self-medicating themselves with arsenic.
Review the effects of arsenic as a soil pollutant on human health. You need to consider the major sources of arsenic (both natural & man-made), pathways for uptake by people and the impacts on human health.
During digestion, the body breaks down food into smaller molecules that could then be used by the body’s cells and tissues in order to perform functions. This starts off in the mouth with the physical movements of chewing and the chemical breakdown by saliva. Enzymes in the stomach break food down further after traveling from the mouth through the esophagus. The food from here then moves into the small intestine, where pancreatic juices and enzymes dissolve proteins, carbohydrates, and fibers, and bile from the liver breaks down fats into these small molecules. Any portion of the fibers or food that were unable to be broken down are passed from the small intestine to the large intestine, which is where the digestive tract transitions into the excretory tract, then the colon and out of the rectum. Any liquids that have been stripped of their nutrients by the body proceed from the stomach to the kidneys. In the kidneys, sodium ions (Na+), uric acid, and urea are exchanged with water, which moves urinary bladder and is excreted through the
A teratogen is any agent that causes abnormality in a developing embryo. Teratogens are agents that cross the placental wall and cause physical abnormalities, along with cognitive and behavioral defects. Usually, these malformations show up anywhere from the third to eighth week of pregnancy, or the first trimester, which is when major organ systems are developing. Some types of teratogens consist of certain medications, chemicals, and infections or other diseases in the mother (Things to Avoid During Pregnancy: Teratogens, 2016).
Arsenic is a naturally occurring element that has been known to be a very toxic poison for hundreds of years. This metalloid has properties of metals and nonmetals. It has two forms, the organic forms including arsenobetaine, arsenocholine, MMA and DMA and the inorganic forms including As (III) and As(V). This poison can be dated as far back as 3000 years ago in Chinese medicine that is still used today. Egyptians used arsenic as a way to harden copper and as embalming fluid. During the Middle Ages it was used as a suicidal or homicidal agent. Throughout history, many rulers have used arsenic as a way to remove all threats and competition. Even Dioscorides, a very famous Greek physician who studied poisons from plants, animals and minerals, recognized arsenic as a poison during the 1st century. An Arab alchemist turned arsenic in the white tasteless powder that it still is today. In the 1500s, arsenic was used as a rat poison.6
It’s no secret that fragrance matters to us. It is a huge part of how we experience the products we use and the world at large. For this reason, it’s a deal breaker when it comes to our beauty and personal care products, especially if it’s a product that you leave on the hair and skin or a fragrance that lingers. Many of us have given up products that worked well because we could not stand the smell or because our significant other complained. The fact that fragrance affects not just us but those around us is something we often tend to overlook. Fashion icon Sarah Jessica Parker of Sex and the City once said this about fragrance "It 's immediately communicating more than your clothes, which we think tell our story, right? But clothes don 't invade anybody else 's space.” That’s so true. You can look away if a coworker is wearing something you don’t like, but you can’t hold your breath all day, now can you? Fragrance can even linger in a space long after the wearer has gone or linger on your close, long after you hugged your best friend. Fragrance has such a