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Metanephridia - Excretion
Metanephridia are found in coelomates (e.g., annelids). These animals have evolved a close circulatory system intimately associated with the excretory organs resulting in direct exchange of material between the two systems. In these worms an isosmotic fluid appears initially in the nephridium due to filtration of the coelomic fluid through the ciliary mesh of the nephrostpme. Salt is later withdrawn from the fluid as it passes through the extensively looped duct and finally dilute urine is discharged.
ROL E OF NUCLEIC ACIDS - These are DNA / RNA. Unit is nucleotides. Present in viruses and all cells. DNA is concerned as genetic material. RNA as genetic material
Axon: Axon is a projection from the cell body. Each neuron has only one axon. Unlike dendrites, axons are very long and are usually unbranched structures. The axon
Q. What is the life cycle type of bryophytes? As in all plants the life cycle of bryophytes is diplobiontic (alternation of generations) and in bryophytes the lasting form is t
INORGANI C SUBSTANCES They are small, simple, low molecular weight substances which are made of elements other than Carbon and Hydrogen combined together. Inorganic substan
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Define Objective of nutrient needs during periods of pregnancy? describe the various physiological changes during pregnancy, describe foetal growth and development and
Q. Explain about Hypoglycemia? It is a Greek term: hypo -meaning less; glyc- means sweet; and emia- means "of the blood". It is a condition in which less than normal amount of
Adenylate cyclase in the liver cell membrane Glucagon activates adenylate cyclase in the liver cell membrane and thus turns on glycogenolysis and reduces glycogenesis. Insu
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