Brain Atlas - Introduction The central nervous system (CNS) consists of the brain and the spinal cord, immersed in the cerebrospinal fluid (CSF). Weighing about 3 pounds (1.4 kilograms), the brain consists of three main structures: the cerebrum, the cerebellum and the brainstem. Cerebrum - divided into two hemispheres (left and right), each consists of four lobes (frontal, parietal, occipital and temporal). The outer layer of the brain is known as the cerebral cortex or the ‘grey matter’. It covers the nuclei deep within the cerebral hemisphere e.g. the basal ganglia; the structure called the thalamus, and the ‘white matter’, which consists mostly of myelinated axons. – closely packed neuron cell bodies form the grey matter of the brain. Cerebellum – responsible for psychomotor function, the cerebellum co-ordinates sensory input from the inner ear and the muscles to provide accurate control of position and movement. Basal Ganglia Thalamus and Hypothalamus Ventricles Limbic System Reticular Activating System Neurons Glia
Cell Cycle & Cytokinesis - BioChemWeb.org Cell Cycle Regulation and the Control of Cell Proliferation (Cell Growth + Cell Division) Cell Cycle Research - General resource with links to relevant recent literature, news and job listings. (Ion Channel Media Group) Cell Division - Undergraduate-level lectures on cell division. See also the Apoptosis, Cell Senescence and Signal Transduction pages. Mitosis, Meiosis and the Mechanics of Cell Division See also the Cytoskeleton, Cell Motility and Motors page. Cancer Resources A major component of cancer progression is the loss of normal controls on cell proliferation (disruption of normal cell cycle regulation and cell signaling), in addition to other changes involving angiogenesis, cell adhesion, invasion and metastasis. See also the Tumor Cell Invasion and Metastasis section of the Cytoskeleton, Cell Motility and Motors page and the Angiogenesis, Cell Adhesion and Extracellular Matrix and Signal Transduction pages. Labs Studying Visits:
B vitamins List of B vitamins[edit] Vitamin B1 (thiamine)Vitamin B2 (riboflavin)Vitamin B3 (niacin or niacinamide)Vitamin B5 (pantothenic acid)Vitamin B6 (pyridoxine, pyridoxal, or pyridoxamine, or pyridoxine hydrochloride)Vitamin B7 (biotin)Vitamin B9 (folic acid)Vitamin B12 (various cobalamins; commonly cyanocobalamin in vitamin supplements) B vitamin molecular functions[edit] B vitamin deficiency[edit] Several named vitamin deficiency diseases may result from the lack of sufficient B-vitamins. B vitamin side effects[edit] Because water-soluble B vitamins are eliminated in the urine, taking large doses of certain B vitamins may produce transient effects. B vitamin sources[edit] B vitamins are found in whole unprocessed foods. The B12 vitamin is of note because it is not available from plant products, making B12 deficiency a legitimate concern for vegans. Another popular means of increasing one's vitamin B intake is through the use of dietary supplements. Related nutrients[edit] References[edit]
Master Muscle List Home Page Ten Recent Advances in Evolution By Carl Zimmer Posted 10.26.09 NOVA To celebrate the 150th anniversary of the Origin of Species, here's a list—by no means exhaustive—of some of the biggest advances in evolutionary biology over the past decade. These advances include not just a better understanding of how this or that group of species first evolved, but insights into the evolutionary process itself. In some cases those insights would have given Darwin himself a pleasant jolt of surprise. Ten significant leaps forward in evolution research in the past decade, as chosen and described by noted science writer Carl Zimmer Enlarge Photo credit: (Earth) © NASA; (text) © WGBH Educational Foundation Darwin envisioned natural selection acting so slowly that its effects would be imperceptible in a human lifetime. If he were alive today, Darwin would be astonished at the pace and nature of discoveries being made in evolutionary biology, including the witnessing of evolution in action.
The Journal of Nutritional Biochemistry - Dietary supplements of mixtures of indispensable amino acids lacking threonine, phenylalanine or histidine increase the activity of hepatic threonine dehydrogenase, phenylalanine hydroxylase or histidase, respecti Received 18 July 2000; received in revised form 4 January 2001; accepted 9 January 2001. Experiments were carried out to determine whether the addition of a mixture of indispensable amino acids (IAA) lacking in threonine, phenylalanine or histidine, respectively, to a nutritionally complete diet would increase the hepatic activities of the rate-limiting enzymes for catabolism of threonine, phenylalanine or histidine and prevent the adverse effects of the amino acid on growth when the dietary level of the amino acid is excessive. Week old Leghorn chicks were fed semi-purified diets containing 19% crude protein to which were added no IAA supplement or 10% crude protein from an IAA mix and 5 graded levels of either L-threonine, L-phenylalanine or L-histidine in a 2 × 5 factorial arrangement of treatments. Keywords: Chicks, Dietary protein, Amino acid excess, Amino acid catabolism
Eskeletons educreations teacherswithapps Educreations Interactive Whiteboard, by Educreations, Inc, is an incredible, yes that’s right, INCREDIBLE app. This newly released app comes with the huge bonus of being FREE! We think this app has the edge needed to push education in the right direction and to begin modernizing teaching as we know it. Educreations is not the first app using the whiteboard concept, but it is the first one geared specifically for the classroom. Educreations Inc had the wherewithal to realize the need to add the option to use multiple pages for the same lesson; this is another feature that makes this app a standout. This revised Bloom’s Taxonomy pyramid shows classification of levels of intellectual behavior that is important in the learning process. It is obvious that the developers in this new start-up company spent much time and consideration while incorporating user-friendly features into this app.
The Role of Elements in Life Processes | Mineral Information Institute