Download PDF by Tilden Wayne Perry: Animal life-cycle feeding and nutrition

By Tilden Wayne Perry

ISBN-10: 0323138918

ISBN-13: 9780323138918

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The potassium content of the red blood cells is 20 times greater than that of the plasma, whereas sodium is found in the plasma outside the red cells. Red cell walls are permeable to water. Thus, water moves from plasma to corpuscle as the blood changes from the arterial to the venous circulation and in the reverse direction as the blood reenters the arteries in the pulmonary circulation. Potassium constitutes over one-half of the cations of saliva—over one-fourth of the total ions. In milk it constitutes 28% of the total cations.

Thus, the level of calcium available in the diet is inversely proportional to the absorbability of calcium across the wall of the small intestine. There is much speculation on the role of vitamin D and its effect on calcium absorption. When lactose, or milk sugar, is present in the diet, animals will absorb a larger proportion of their dietary calcium. It has been demonstrated that the addition of any of several amino acids to the diet, lysine in particular, increases the level of calcium absorption.

Furthermore, magnesium deficiency symptoms may be observed when dietary levels of magnesium are sufficiently high. It has been assumed, therefore, that a magnesium deficiency is often the result of either poor absorption or accelerated excretion. VII. SULFUR Organic sulfur is used as the basis of determining requirements and functions for the monogastric animal. The organic sulfur compounds include the amino acids methionine, cystine, and cysteine, the vitamins biotin and thiamin, certain mucopolysaccharides, glutathione, heparin, and coenzyme A.

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Animal life-cycle feeding and nutrition by Tilden Wayne Perry

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