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Nuclei of Hypothalamus – Mnemonic
Ingredients that fall within the scope of this paragraph are considered to be ingredients with a known acute toxicity estimate ATE. The renal portal system collects the blood from the hind parts on the body from which the urea and uric acid present in the blood are first got filtered in the kidneys before the blood goes into postcaval and then to the heart. Cornell Center for Fungal Crustose lichen, Ascomycotina. Weather Around the World. Known or presumed human reproductive toxicant Substance shall be classified in Category 1 for reproductive toxicity when they are known to have produced an adverse effect on sexual function and fertility or on development in humans or when there is evidence from animal studies, possibly supplemented with other information, to provide a strong presumption that the substance has the capacity to interfere with reproduction in humans. Jobs for Elementary Students. Temperature, pH and Substrate Concentration effects on enzyme activity practicals.

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Urine: Composition, Constituents and Deposits

Normally, mg of indican are excreted and the amount increases in constipation. Phosphates of food are not completely absorbed. Some phosphate is also derived from cellular breakdown. Marked increase of phosphate excretion is also observed in hyperparathyroidism and decrease in hypoparathyroidism and in infectious diseases. Sodium content varies with intake. Urine potassium increases when the intake is increased or in excessive tissue catabolism. The excretion of potassium is affected by alkalosis.

The pregnancy test is also performed by the urinary sex hormones. The traces of protein mg present in normal urine cannot be detected by the ordinary simple tests.

Pathologically, several proteins, such as serum albumin, serum globulin, hemoglobin, mucus, proteose, Bence-Jones proteins are found in urine.

In this condition, less than 0. Proteinuria is marked in glomerulonephritis. The proteinuria increases with the increasing severity of the renal lesion. Bence-Jones proteins found in the urine are the peculiar proteins which are light chain fragments of globulins. It is said to be glycosuria when more than this quantity is found in urine. There are different causes of glycosuira. Transient glycosuria is observed after emotional stress such as exciting atheletic contest. But in case of pregnant women and lactating mother, the Osazone test must be performed for urine glucose to eliminate the lactose present in urine.

These may occur occasionally in infants, pregnant women and lactating mother. Galactosuria may occur in inherited diseases due to the non-conversion of galactose to glucose. To detect these other sugars in urine it is wise to perform Osazone test.

In the lesion of the kidney or urinary tract blood is excreted in the urine in addition to its presence in nephritis.

Free hemoglobin is also found in urine after quick hemolysis, e. In excessive hemolysis, e. This gives the urine an orange colour. The increased amount of coproporphyrins in the urine is a characteristic of the urine of patients suffering from porphyria.

The commonest deposits are phosphates, oxalates and urates and are frequently seen in normal urine. Learn and research biology, science, chemistry, biology, physics, math, astronomy, electronics, and much more. This site is FREE! Choose a subject below. A study of biology includes the study of the chemical basis of living organisms, DNA. Other related sciences include microbiology and organic chemistry. The word science comes from a Latin word scientica, which means knowledge, or information.

Science is a process of systematically gathering detailed information and gaining exact knowledge. We do not know all the "life" information secrets but we are learning more every day. The three biological life cycle s, are; Zygotic meiosis, Sporic meiosis, and Gametic meiosis,. Amoeba - one basic life form. Amoebas and there are many different kinds feed by phagocytosis the engulfing and ingesting of foreign particles or waste matter by phagocytes --they flow around their prey usually a smaller cell and engulf it.

Organism that eat other organisms are usually called "consumers". The amoeba's cell membrane then fuses with itself, trapping the prey in a "food vacuole" where it will be digested. In the first place, no slight inconvenience results from too great separation beween branches of study which serve for the perfection of one art. Biologists study life over a wide range of scales: As you can see there are far more than 25 branches of biology. There are also several related disciplines. Medicine -- Physical anthropology.

Biology encompasses a broad spectrum of academic fields that are often viewed as independent disciplines. Together, they study life over a wide range of scales: Famous biologists -- History of biology -- Nobel prize in physiology or medicine -- Timeline of biology and organic chemistry.

Parts of an animal cell. New interviews are being added about every two weeks, so please visit again. Select video and your Internet connection speed: Bagley Inducted News release. Miller Inducted News release. Biology Online - Information in the life sciences in the form of tutorials , references , an online dictionary of biology terms and a biology forum.

Scientific discovery is not always as well planned as the scientific method may seem to suggest. Sometimes new knowledge comes simply from being in the right place at the right time or from being particularly aware of the unusual.

The opposite of the scientific method and its organized planning is discovery by "accident". A hypothesis is a guess as to why something happens. Observations lead to questions regarding the event. Why is the sky blue? How does gravity affect falling objects? In attempting to answer a question about the nature of the world, a scientist will form a hypothesis or a guess regarding the question's answer. Experiments, data gathering and study will then help the scientist to reach a conclusion.

References for the Scientific Method: WATER - Living things are built almost entirely of organic compounds containing carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur, and water.

Water is vital to life because it forms the basis of many body fluids, it is imbibed by structures such as seeds, and it controls temperature regulation. Biology and Water Lesson 1: Principles of Ecology - Biology: Temperature Coriolis Effect Atm. For information on the Cambrian period: For information on the "tree of life" quite relevant to taxonomy: For general information on evolution: Ferns reawakened What is Evolution?

Evolution in the above links is based on current scientific evidence. Beagle as naturalist, I was much struck with certain facts in the distribution of the organic beings inhabiting South America, and in the geographical relations of the present to the past inhabitants of that continent. See 72, image results for dinosaurs. Zoom Dinosaurs - EnchantedLearning.

Try this search facility - just click on the first letter of what you need information on. Periodic Chart of the Elements with correlation to their health aspects - http: Taxonomy Detailed information and examples and links to database searches are found on our Microscopy Page Paragraph 3. All life forms are composed of basic chemical elements. Atomic elements prefer to exist as molecules.

Earth life thrives on water. Life is built up from some very common materials. There is one substance though that is more complicated and vital to life.

A Dutch biochemist, named Mulder, first used the word "protein" in He got the word form a Greek word meaning "holding first place. Although proteins are complicated they consist the elements of carbon, hydrogen, oxygen, nitrogen and sulphur. Some parts of the human body contain more than other parts but it exists is some amount in all parts of the body and it is vital for life to exist. There is no living organism that does not contain protein.

Viruses for example contain a complicated type of protein called nucleoprotein. When proteins are exposed to an acid the protein breaks apart into smaller molecules. These smaller molecules are called amino-acids. Millions of different proteins can be formed from the combinations of different amino-acid molecules. Some common proteins are: Difference Patterson Tutorial; PR Enzymes control body chemistry. The enzymes of the human body work by means of surface catalysis http: That is the surface of the enzyme enables other molecules to react in a manner they would not without the surface of the enzyme present.

The enzyme being the catalyst is not changed in any manner from the action of the protein. The human body contains only a small quantity of enzymes but even this small quantity is sufficient. They are important to many functions including food digestion. For an explanation of what an enzyme is click here http: Some, however such as egg cells of birds, can be seen with the naked eye.

Others, like nerve cells, may be very small in some of their dimensions, but extremely long; a single human nerve cell may be as much as 3 or 4 feet long, and an elephant's nerve cell may be even longer. To say that cells are generally small is not saying much, however, because even among microscopic cells there is a wide range in size. Biologists took it for granted that cells are bounded by a membrane - the plasma membrane, as it is often called.

Cell image from http: The cell membrane is not simply an envelope giving mechanical strength and shape and some protection to the cell, though these functions are important. It regulates the traffic in materials between the precisely ordered interior of the cell and essentially unfavorable and potentially disruptive outer environment. Usually portions of the cell flow around the material, enclosing it within a chamber.

When the engulfed material is liquid or consists of very small particles, the process is often termed pinocytosis. Cell Biology Links - Click on the links below for detailed information. Everything you need to know about Protonema. Moss gametophytes and sporophytes Moss capsule Moss antheridia Moss archegonia Marchantia thallus Marchantia archegonia Marchantia antheridia.

Ligustrum Leaf Cross Section. Evergreen ligustrum often called privet shrubs and trees thrive throughout the state of Florida. They are widely used as landscape shrubs, hedges, and specimen trees.

Many species and cultivars are available with a diversity of leaf colors, leaf forms, and growth habits. All selections are tolerant of heavy pruning, which makes them suited for clipped hedges. Because of a rapid growth rate, many require pruning to maintain them within bounds.

The white flowers are attractive during late spring and early summer. However, the pungent odor may be objectionable. The nucleus plays the central role in cellular reproduction, the process whereby a single cell undergoes cell division and forms two new cells. The nucleus directs the metabolic activities of the living cell and guides the life of the cell as long as it lives. Study Stack Flash Cards. Opposing Views Search Engine. What's in the Bag?

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