单词	quantal
释义	quantal /ˈkwɒnt(ə)l / adjective technical 1Composed of discrete units; varying in steps rather than continuously: a quantal release of neurotransmitter... The number of receptors opened following quantal release may vary directly with the total number of receptors at the synapse, but other, more complex, interactions may occur. Expression of tetanus toxin is known to reduce the frequency of spontaneous quantal release. Ideally, this requires the identification of peaks in the histogram at a spacing of one quantal unit. 1.1 Physics Relating to a quantum or quanta, or to quantum theory.In this experiment UV + and UV - filters were chosen to yield equal quantal transmittance despite the difference in transmitted wavelengths. 1.2chiefly Physiology Relating to or denoting an all-or-none response or state.Furthermore, it allows one to calculate the apparent quantal size for each response in a sequence of stimuli.... In this case, the quantal amplitude of postsynaptic response strongly depends on the number of accessible postsynaptic receptors in the vicinity of the release sites. The extrasynaptic receptors that are exposed to a much lower concentration of agonist and are not saturated may substantially enhance the quantal synaptic response. Derivatives quantally adverb ... Thus, a single Gag particle associates ‘quantally’ with one lipid raft, containing homogeneous trimeric viral envelope proteins, to assemble functional virions. Analgesia was defined quantally as a doubling or greater of the baseline latency for each mouse. Origin Early 20th century: from quantum + -al.
随便看	colourology colour organ colour palette colour pan subsizar subsizarship subsocial subsoil subsoiler subsoil plough subsoil ploughing subsoil plow subsoil-plow subsoil plowing subsolar subsolary subsolidus subsong subsonic subsonically subsortition sub-sovereign subsp. subspace subspecialist

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