.... in the coelenteron, a gut-like cavity, and the residue is completely digested in cells of the body wall. Scientists believe that intracellular digestion in organisms such as Hydra has evolved from such protozoans as amoebae and paramecia. In most higher animals digestion is completed not in the cell in the cavity of a digestive tract (the stomach and intestine). Animals with this type of digestion include crustaceans, insects, cephalopods, tunicates, and all vertebrates. A few animals with digestive tracts also partially digest their food before eating it. Some spider .....

.... users, but its impact on creativity and other intellectual activities is hard to define. Caffeine can be habit-forming. Some regular users who give it up may experience withdrawal symptoms twelve to sixteen hours after the last dose, such as: drowsiness, headaches, lethargy, irritability, disinterest in work, depression, occasional nausea and vomiting. How caffeine affects you depends on what and how much you drink. Strongly brewed coffee or tea has much more caffeine than a weakly brewed drink. Age and size make a difference too: A caffeinated soft drink consumed by a chil .....

.... cell line monolayers selectively restricted the permeation of hydrophilic permeability markers proportional to molecular weight and discriminated more accurately between the molecules of intermediate molecular weight compared to Caco-2 cells. These results indicated that 2/4/A1 cells could be used as a model for hydrophilic drug absorption. INTRODUCTION The small intestine plays a crucial role in the absorption of drugs and nutrients. Exogenous substances cross a series of barriers during the process of intestinal absorption: (1) the aqueous boundary/mucus layer, ( .....

.... means that there is a chance that your own child could have it. Unlike what most people think, dyslexia is not to be blamed on the parent for negligence in teaching reading and writing. Dyslexia is not any ones fault it simply occurs when the barrier in the language center of you brain cracks. In some experiments done by the University of Montreal, they are comparing good adult readers to dyslexic adult readers. In most cases the adult dyslexics were at about the high school level. When the adult dyslexics were compared to third graders in matching sounds with letters, the .....

.... include anhedonia, disturbances in sleep and appetite, psychomotor retardation, loss of energy, feelings of worthlessness, guilt, difficulty thinking, indecision, and recurrent thoughts of death and suicide (Hollandsworth, Jr. 1990 ). The manic episodes are characterized by elevated or irritable mood, increased energy, decreased need for sleep, poor judgment and insight, and often reckless or irresponsible behavior (Hollandsworth, Jr. 1990 ). Bipolar disorder is diagnosed if an episode of mania occurs whether depression has been diagnosed or not (Goodwin, Guze, 1989, p 11). .....

.... a baby that can't defend it self. The pro's of pro-life are that the baby gets a chance to live and experience life outside of the womb and maybe someone who is unable to have children will get the chance to be a mother or father if they adopt this child who would have been aborted. The opposing side takes a different side to the argument. The pro side of legalizing abortion is known as pro-choice which is the side of the argument that believes that if a woman is pregnant she should have the right to abort. Some activist believe there are a number of reasons wh .....

.... and the recent issues of BSE in the world. I hope to set out the true facts about BSE and that it only affects a small percent of the world population. Due to the fact BSE is a new disease most of my information might be proven wrong in the future because there is a great deal of testing going on in the scientific community. They are also very concerned about this new disease and the effects it can have on humans if it is not stopped. Bovine spongiform encephalopathy is not some bacteria and it is not a virus, but in fact it is an infectious protein or prion [Greger .....

.... own medical needs with those of their infants. Other concerns of activists that were voiced were that they don't want laws, policies or medical care imposed on women merely as "vectors" who may transmit HIV to their infants. The new guidelines recommend that all pregnant women should receive HIV counseling and testing. These guidelines are aimed at helping pregnant women know their HIV status early so that medical care, including zidovudine (Retrovir, known as AZT, Burroughs Welcome Co., Research Triangle Park, NC), can be made available. The new guidelines also reiterat .....