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Chemotaxis - Modes of Cell Movement
Chemotaxis considers to me directed movement of cells in response to a concentration gradient of a chemical factor in solution. An instance of chemotaxis during morphogenesis of the embryo is the migration of embryonic lymphocytes from bone marrow to embryonic thymus. The compound accountable for the directed movement of cells is shown to be a heat-stable peptide with a molecular weight of 1000 to 4000 daltons. The peptide is almost certainly produced by the thymus. The gradient of the peptide would be highest in the thymus towards that the cells move.
Q. Concerning the nitrogen- containing bases that participate in nucleotides, what is the difference between RNA and DNA? In DNA nucleotides can be formed of thymine (T), adeni
Vegetative Development - Morphogenesis This term is coined for the process leading to and determining the form and structure of organs. It is used mainly by experimental morph
Auxins The history of discovery of auxin is a fascinating chapter in plant physiology. The hormone auxin was discovered first, through some elegant experiments by Charles Darw
Open Mitral Valvotomy : Technique: A median stemotomy is done; peri cardium opened and stay sutures taken. After heparinisation ascending aorta is cannulated and then SVC
Intracellular sodium concentration of the motor neuron A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM. The neuron is healthy.
Food Sources of Proteins Food protein sources can be divided into 3 major categories: a. Protein of Animal Origin b. Protein of Plant Origin c. Single cell protein
Assume you are injecting a sub threshold depolarizing current step into a neuron. Draw the corresponding membrane voltage response; be sure to indicate the shape of the voltage cha
Diploidy and Haploidy :: In the chromosomal complement given species not all the chromosomes are different from each other .In fact these are in pairs ,i.e. every two chrom
Action of Hormones We said earlier that hormones are released into the blood stream or extracellular fluid and therefore, reach most of the cells of the body. However, they
KIDNE Y (RENAL FAILURE) - RF - Partial or total inability of kidney to carry excretory functions is called RF. It leads to uremia (excess of urea in blood), salt-water imba
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