Examlex
Who discovered O2 in 1774 and described it as "dephlogisticated air"?
Receptors
Specialized cells or protein molecules in the body that receive and respond to chemical signals, such as neurotransmitters or hormones.
Energy
The capacity to do work or produce change, existing in various forms such as kinetic, potential, thermal, and others.
Electromagnetic Spectrum
The range of all types of electromagnetic radiation, from gamma rays to radio waves, including visible light.
Gamma Rays
High-frequency electromagnetic waves emitted by atomic nuclei during radioactive decay, possessing high energy capable of penetrating most materials.
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