Excretion in the Blood-sucking Bug, Rhodnius Prolixus Stal. Ii. the Normal Course of Diuresis and the Effect of Temperature.
نویسنده
چکیده
It has recently been shown that the diuresis of fed 5th-stage larvae of Rhodnius is brought about by a hormone that appears in the haemolymph (Maddrell, 1962, 1963). This diuretic hormone is released from the fused ganglionic mass in the mesothorax, probably from its posterior neurosecretory cells. This paper examines some of the features of this diuresis in the light of this discovery and includes a section on the effect of temperature on the process of diuresis.
منابع مشابه
Excretion in the Blood-sucking Bug, Rhodnius Prolixus Stal. 3. the Control of the Release of the Diuretic Hormone.
It seemed reasonable to suppose that the release of the hormone was stimulated nervously or Immorally or both. The possibility of nervous control was examined first. Various of the nervous connexions to the ganglionic mass (Fig. 1) were cut, the insects were fed and the amount of urine subsequently produced was measured as described elsewhere (Maddrell, 1964). After diuresis the insects were di...
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Plant sucking heteropteran bugs feed regularly on small amounts of K(+)-rich plant material, in contrast to their hematophagous relatives which imbibe large volumes of Na(+)-rich blood. It was anticipated that this would be reflected in the endocrine control of Malpighian tubule (MT) secretion. To explore this, neuroendocrine factors known to influence MT secretion were tested on MT of the pent...
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Haematophagous insects can ingest large quantities of blood in a single meal and eliminate high volumes of urine in the next few hours. This rise in diuresis is possible because the excretory activity of the Malpighian tubules is facilitated by an increase in haemolymph circulation as a result of intensification of aorta contractions combined with an increase of the anterior midgut peristaltic ...
متن کاملAllatostatin-C antagonizes the synergistic myostimulatory effect of allatotropin and serotonin in Rhodnius prolixus (Stal).
Haematophagous insects can ingest large quantities of blood in a single meal producing a large quantity of urine in the following hours to eliminate the excess of water and mineral ions incorporated. The excretory activity of the Malpighian tubules is facilitated by an increase in haemolymph circulation as a result of the intensification of aorta contractions, combined with an increase of anter...
متن کاملPurification and characterization of prolixin S (nitrophorin 2), the salivary anticoagulant of the blood-sucking bug Rhodnius prolixus.
The salivary anticoagulant of the blood-sucking bug Rhodnius prolixus was purified to homogeneity using a protocol consisting of weak cation-exchange, DEAE, hydrophobic-interaction and octadecyl reverse-phase chromatography, yielding a protein with the same N-terminal sequence as nitrophorin 2, one of the four NO haem protein carriers present in the salivary glands of Rhodnius with a molecular ...
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ورودعنوان ژورنال:
- The Journal of experimental biology
دوره 41 شماره
صفحات -
تاریخ انتشار 1964