A text-book of physiology: normal and pathological. For students and practitioners of medicine

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Lea brothers & co., 1905 - Medical - 795 pages
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Page 39 - For these and many other reasons . . . the nucleus is generally regarded as a controlling centre of cell-activity, and hence a primary factor in growth, development, and the transmission of specific qualities from cell to cell, and so from one generation to another.
Page 55 - The remarkable fact has now been established with high probability that every species of plant or animal has a fixed and characteristic number of chromosomes, which regularly recurs in the division of all of its cells, and in all forms arising by sexual reproduction the number is even...
Page 360 - The food in the fundus is not moved by peristalsis, and consequently it is not mixed with the gastric juice; salivary digestion can, therefore, be carried on in this region for a considerable period without being stopped by the acid gastric juice.
Page 713 - Any other hypothesis seems to me, on the face of it, untenable. Either there is some arrangement, some organization, in the cerebrum, or there is none. If there is no organization, the cerebrum is a chaotic mass of fibres, incapable of performing any orderly action. If there is some organization, it must consist in that same "physiological division of labour...
Page 713 - Whoever calmly considers the question, cannot long resist the conviction that different parts of the cerebrum must, in some way or other, subserve different kinds of mental action.
Page 47 - Life is the continuous adjustment of internal relations to external relations." The same idea may be stated in slightly different terms: Life in an organism, is a correlation of energies, manifested by a continuous adjustment of its internal activities to its environment.
Page 360 - The food in the pyloric portion is first pushed forward by the running wave, and then by pressure of the stomach wall is returned through the ring of constriction; thus the food is thoroughly 854 855 mixed with gastric juice, and is forced by an oscillating progress to the pylorus.
Page 475 - The large calorie, or the amount of heat required to raise 1 kilogram of water 1 C. (1 pound of water 4 F.), is the standard measurement of heat energy.
Page 351 - It is a rule, almost without exception, that the acidity of the juice is closely dependent upon the rate of secretion; the more rapid the latter, the more acid the juice, and vice versa
Page 39 - ... without perceptible impairment. Such a mass of protoplasm is, however, devoid of the powers of assimilation, growth, and repair, and sooner or later dies. In other words, those functions that involve destructive metabolism may continue for a time in the absence of the nucleus ; those that...

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