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Related Concept Videos

Torque01:10

Torque

Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
Journal Bearings01:23

Journal Bearings

Journal bearings are mechanical components that support and provide lateral stability to rotating shafts and axles. They are crucial in reducing friction, wear, and vibration in machinery such as engines, turbines, and pumps. The principle behind journal bearings is forming a thin lubricant film between the bearing surface and the rotating shaft, which minimizes direct contact and reduces frictional forces.
To better understand the concept of journal bearings, consider a rope winch with dry or...
Symbiosis00:58

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
Sustainable Development01:43

Sustainable Development

As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
Magnetic Fields01:27

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
Korotkoff Sounds01:12

Korotkoff Sounds

Korotkoff sounds are the specific sounds heard while measuring blood pressure using a sphygmomanometer, typically with a stethoscope or a Doppler device. They are named after Russian physician Nikolai Korotkov, who first described them in 1905. These sounds correspond to turbulent blood flow in the artery as the blood pressure cuff is gradually released after inflation.
During blood pressure assessment, inflating the cuff 30 millimeters of mercury above the patient's systolic blood pressure...

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Related Experiment Video

Updated: Jul 1, 2026

Light/dark Transition Test for Mice
10:35

Light/dark Transition Test for Mice

Published on: November 13, 2006

The people behind the papers - Kaoru Sugimura

    Development (Cambridge, England)
    |June 30, 2026
    PubMed
    Summary

    Precise cell-size control in tissues emerges from the coordinated actions of different cell groups. This study reveals the underlying mechanism using live imaging and quantitative modeling.

    Area of Science:

    • Developmental biology
    • Cell biology
    • Quantitative biology

    Background:

    • Cell size regulation is a fundamental question in developmental biology.
    • Understanding how cells achieve precise size control is crucial for tissue development and function.

    Purpose of the Study:

    • To reveal the mechanism underlying precise cell-size control.
    • To investigate how coordinated behavior of distinct cell lineages contributes to tissue-level size regulation.

    Main Methods:

    • Utilized live imaging techniques to observe cell behavior in real-time.
    • Employed quantitative modeling to analyze and understand the emergent properties of cell-size control.

    Main Results:

    • Identified a mechanism where precise cell-size control arises from the coordinated behavior of different cell lineages.

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  • Demonstrated the link between collective cell behavior and tissue-level size regulation.

    • Conclusions:

    • The coordinated behavior of distinct cell lineages is key to achieving precise cell-size control in developing tissues.
    • Live imaging and quantitative modeling are powerful tools for dissecting complex biological mechanisms.