noun
definition
Any substance that is secreted by an organism
definition
The act of secreting a substance, especially from a gland
Examples of secretion in a Sentence
The whole of this surface appears to be active in the secretion of a mucous-like substance.
To the right (in the figure) of the rectal peduncle is seen the deeply invaginated shell-gland ss, with a secretion sh protruding from it.
Sodium salicylate escapes from the blood mainly by the kidneys, in the secretion of which sodium salicylate and salicyluric acid can be detected within fifteen minutes of its administration.
They are said to diminish the secretion of the bronchial mucous membrane.
Body temperature and the secretion of the hormone melatonin follow the daily cycle.
The musky odour from which the animal takes its name does not appear to be due to the secretion of any gland.
This everyday shampoo eliminates them, regulating sebum secretion and easing discomfort.
Some of what is called amber and copal in perfumery today is the resinous secretion of fossil conifers.
The proteins synthesized on ribosomes attached to the ER, are then transported to the Golgi, and packaged for secretion.
It also suppresses secretion of glucagon, a hormone which boosts plasma sugar levels.
During lactation, the secretion of prolactin can entail a poor prognosis to ovarian stimulation.
Cushing 's Syndrome results from an excess secretion of the hormone cortisol.
These papillae give the surface a roughened aspect; the use of their secretion is unknown.
Reduced secretion of mucus in the lungs predisposes to irritation and infection throughout the upper and lower respiratory tract.
The somatostatin analog octreotide may help control hormone secretion and stabilize tumor growth.
It has been proved that the secretion contains a digestive ferment capable of rendering proteid matter soluble.
The simple form of ocellus described in the foregoing paragraph may become folded into a pit or cup, the interior of which becomes filled with a clear gelatinous secretion forming a sort of vitreous Modified after Linko, Travaux Soc. Imp. Nat., St.
It has been ascertained that in many cases this decomposition is effected by the secretion of an enzyme, which has been termed zymase.
This is evident from the consideration that the growth of the cells is attended by the growth in surface of the cell wall, and as the latter is a secretion from the protoplasm, such a decomposition cannot readily take place unless oxygen is admitted to it.
The stretching of the cell wall by the hydrostatic pressure is fixed by a secretion of new particles and their deposition upon the original wall, which as it becomes slightly thicker is capable of still greater extension, much in the same way as a thick band of indiarubber is capable of undergoing greater stretching than a thin one.
In both these cases the stimulation is followed, not only by movement, but by the secretion of an acid liquid containing a digestive juice, by virtue of which the insect is digested after being killed.
Whether the formation of the starch grain is due to a secretion from the plastid (Meyer, 1895) or to a direct transformation of the proteid of the plastid (Timberlake, 1901) has not been definitely established.
The musky odour from which it derives its name is due to the secretion of a large gland situated in the inguinal region, and present in both sexes.
These substances may be formed in the cells and given out as a secretion, or they may be formed by an intercellular transformation.
The desquamated cells containing this jelly-like substance become disorganized and blend with the secretion.
Heidenhain, on the other hand, rejected entirely the filtration view of lymph-formation, believing that the passage of lymph across the capillary wall is a true secretion brought about by the secretory function of the endothelial plates.
The movements of bones and muscles were referred to the theory of levers; the process of digestion was regarded as essentially a process of trituration; nutrition and secretion were shown to be dependent upon the tension of the vessels, and so forth.
In 1872, Hoppe-Seyler (1825-1895) gave a new beginning to our knowledge of the chemistry of secretion and of excretion; and later students have increased the range of physiological and pathological chemistry by investigations not only into the several stages of albuminoid material and the transitions which all foodstuffs undergo in digestion, but even into the structure of protoplasm itself.
Thus the defects, whether of this secretion or of that, and again of motor activity, the state of the valvular junctions, the volume of the cavities, and their position in the abdomen, may be ascertained, and dealt with as far as may be; so that, although the fluctuations of chemical digestion are still very obscure, the application of remedies after a mere traditional routine is no longer excusable.
Milk sugar, lactose, lactobiose, C12H22011, found in the milk of mammals, in the amniotic liquid of cows, and as a pathological secretion, is prepared by evaporating whey and purifying the sugar which separates by crystallization.
The stimulation of the liver is said to depend upon the solution of the resin by the intestinal secretion.
Given internally in small quantities and in sufficient dilution, alcohol causes dilatation of;he gastric blood-vessels, increased secretion of gastric juice, and greater activity in the movements of the muscular layers in the wall of the stomach.
The materials are bound together by a tough white thread which is formed by a secretion of the kidneys of the male.
There is hardly any increase in the intestinal secretion, the drug being emphatically not a hydragogue cathartic. There is no doubt that its habitual use may be a factor in the formation of haemorrhoids; as in the case of all drugs that act powerfully on the lower part of the intestine, without simultaneously lowering the venous pressure by causing increase of secretion from the bowel.
In connexion with the ovipositor are two poison-glands, one acid and the other alkaline in its secretion.
This latter organ injects a secretion into the plant or After Marlatt, Bull.
The young of many of these insects are green and soft-skinned, protecting themselves by the well-known frothy secretion that is called " cuckoo-spit."
In the Coccids the forma tion of a protective waxy secretion - present in many genera of Homoptera - reaches its most extreme development.
In some coccids - the " mealy-bugs " (Dactylopius, &c.) for example - the secretion forms a white thread-like or plate-like covering which the insect carries about.
Correlated with their life in dry situations, the bulk of the tissue is succulent, forming a water-store, which is protected from loss by evaporation by a thickly cuticularized epidermis covered with a waxy secretion which gives a glaucous appearance to the plant.
So are the tiny Coniopterygidae, which are covered with a white powdery secretion, and have very small hind-wings.
It is probable that these vesicles are not reservoirs, as was at one time thought, but form some special secretion which mixes with that of the testes.
Old trees are selected, from the bark of which it is observed to ooze in the early summer; holes are bored in the trunk, somewhat inclined upward towards the centre of the stem, in which, between the layers of wood, the turpentine is said to collect in small lacunae; wooden gutters placed in these holes convey the viscous fluid into little wooden pails hung on the end of each gutter; the secretion flows slowly all through the summer months, and a tree in proper condition yields from 6 to 8 Ib a year, and will continue to give an annual supply for thirty or forty years, being, however, rendered quite useless for timber by subjection to this process.
The thread so ejected forms the silk of commerce, which as wound in the cocoon consists of filaments seriposited from two separate glands (discovered by an Italian naturalist named Filippi) containing a glutinous or resinous secretion which serves a double purpose, viz.
It is frequently armed with spines, hooks or stylets, and is further complicated by the addition of a nutritive secretion (the prostate gland) which may open at its base or pass separately by a special duct to the exterior.
When swallowed it rapidly causes a great increase in the salivary secretion, being one of the most powerful sialogogues known.
The final arrest is due to paralysis of the respiratory centre in the medulla oblongata, hastened by a quasi-asthmatic contraction of the non-striped muscular tissue in the bronchial tubes, and by a "water-logging" of the lungs due to an increase in the amount of bronchial secretion.
Thus Karl Christoph Vogt repeated the saying of the French physician Cabanis, " The brain is determined to thought as the stomach is to digestion, or the liver to the secretion of bile," in the form, " Thought stands in the same relation to the brain as the bile to the liver or the urine to the kidneys."
Internally strychnine acts as a bitter, increasing the secretion of gastric juice and the intestinal peristalsis, being a direct stimulant to the muscular coat; in this manner it has a purgative action.
In this tribe are included Orthoptera with a large prothorax, whose eggs are enclosed in a common purse or capsule formed by the hardening of a maternal secretion.