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  2. Closed system - Wikipedia

    en.wikipedia.org/wiki/Closed_system

    A closed system is a natural physical system that does not allow transfer of matter in or out of the system, although – in the contexts of physics, chemistry, engineering, etc. – the transfer of energy (e.g. as work or heat) is allowed.

  3. Isolated system - Wikipedia

    en.wikipedia.org/wiki/Isolated_system

    Properties of Isolated, closed, and open systems in exchanging energy and matter. In physical science, an isolated system is either of the following: a physical system so far removed from other systems that it does not interact with them. a thermodynamic system enclosed by rigid immovable walls through which neither mass nor energy can pass.

  4. Thermodynamic system - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_system

    Properties of isolated, closed, and open thermodynamic systems in exchanging energy and matter. A thermodynamic system is a body of matter and/or radiation separate from its surroundings that can be studied using the laws of thermodynamics.

  5. Closed circuit - Wikipedia

    en.wikipedia.org/wiki/Closed_circuit

    Closed-circuit radio; Closed circuit breathing apparatus, commonly known as rebreathers for portable units, and as component parts of life-support systems for more complex equipment. Closed Circuit, a 1978 Italian film; Closed Circuit, a 2013 British thriller film; An electric circuit is a "closed circuit" if it contains a complete path between ...

  6. Glossary of physics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_physics

    A branch of physics that studies atoms as isolated systems of electrons and an atomic nucleus. Compare nuclear physics. atomic structure atomic weight (A) The sum total of protons (or electrons) and neutrons within an atom. audio frequency A periodic vibration whose frequency is in the band audible to the average human, the human hearing range.

  7. Biophysical chemistry - Wikipedia

    en.wikipedia.org/wiki/Biophysical_chemistry

    Biophysical chemistry is a physical science that uses the concepts of physics and physical chemistry for the study of biological systems. [1] The most common feature of the research in this subject is to seek an explanation of the various phenomena in biological systems in terms of either the molecules that make up the system or the supra-molecular structure of these systems. [2]

  8. Biological thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Biological_thermodynamics

    Biological thermodynamics (Thermodynamics of biological systems) is a science that explains the nature and general laws of thermodynamic processes occurring in living organisms as nonequilibrium thermodynamic systems that convert the energy of the Sun and food into other types of energy.

  9. Gating (electrophysiology) - Wikipedia

    en.wikipedia.org/wiki/Gating_(electrophysiology)

    Voltage-gated ion channel in its closed, open, and inactivated states. The inactivated channel is still in its open state, but the ball domain blocks ion permeation. The ball and chain model , also known as N-type inactivation or hinged lid inactivation, is a gating mechanism for some voltage-gated ion channels.