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Related Concept Videos

Osmoregulation in Insects01:47

Osmoregulation in Insects

Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
Hypothesis: Accept or Fail to Reject?01:17

Hypothesis: Accept or Fail to Reject?

The outcome of any hypothesis testing leads to rejecting or not rejecting the null hypothesis. This decision is taken based on the analysis of the data, an appropriate test statistic, an appropriate confidence level, the critical values, and P-values. However, when the evidence suggests that the null hypothesis cannot be rejected, is it right to say, 'Accept' the null hypothesis?
There are two ways to indicate that the null hypothesis is not rejected. 'Accept' the null hypothesis and 'fail to...
What is Homeostasis?01:16

What is Homeostasis?

Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F). Physiological...
Homeostatic Imbalance01:10

Homeostatic Imbalance

Homeostasis is the maintenance of a stable internal environment within the body, which is crucial for the proper functioning of cells, tissues, organs, and organ systems. The body has various control mechanisms that work together to regulate various physiological parameters such as temperature, blood pressure, pH balance, and fluid balance, to name a few. These control mechanisms are based on feedback loops that can be either positive or negative.
However, sometimes these feedback loops fail,...
Positive and Negative Feedback Loops01:18

Positive and Negative Feedback Loops

Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires  maintaining an internal dynamic equilibrium:

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Where it all began (nearly). 1969.

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Active transport of water by insect Malpighian tubules.

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Dual origin of the renal tubules in Drosophila: mesodermal cells integrate and polarize to establish secretory function.

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Related Experiment Video

Updated: Jun 26, 2026

Dissection and Grading of Ovarian Development in Wild-Type Female Insects
04:41

Dissection and Grading of Ovarian Development in Wild-Type Female Insects

Published on: July 14, 2023

Insect homeostasis: past and future.

Simon Maddrell1

  • 1Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK.

The Journal of Experimental Biology
|January 20, 2009
PubMed
Summary

This study explores hormonal control of insect Malpighian tubule fluid secretion, presenting new findings and highlighting future research directions in insect physiology.

Area of Science:

  • Insect physiology
  • Comparative endocrinology
  • Renal function in invertebrates

Background:

  • Insect Malpighian tubules are the primary organs for excretion and osmoregulation.
  • Fluid secretion by Malpighian tubules is under complex hormonal control.
  • Previous research established key signaling pathways involved.

Purpose of the Study:

  • To present novel, unpublished data on the hormonal regulation of insect Malpighian tubule function.
  • To contextualize new findings within the existing body of knowledge on insect renal physiology.
  • To identify promising avenues for future research in this field.

Main Methods:

  • Physiological experiments on isolated insect Malpighian tubules.
  • Hormonal stimulation assays.

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Last Updated: Jun 26, 2026

Dissection and Grading of Ovarian Development in Wild-Type Female Insects
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  • Measurement of fluid secretion rates.
  • Data analysis and comparison with existing literature.

    • Main Results:

    • Detailed description of previously unpublished experimental results.
    • Demonstration of specific hormonal effects on tubule fluid transport.
    • Quantitative data on secretion rates under various conditions.

    Conclusions:

    • The presented results contribute to a deeper understanding of hormonal control mechanisms in insect Malpighian tubules.
    • New data provide a foundation for further investigation into specific signaling pathways.
    • Identified research gaps and opportunities for advancing insect osmoregulation studies.