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In physiology, [B: 2] a refractory period is a period of time during which an organ or cell is incapable of repeating a particular action, or (more precisely) the amount of time it takes for an excitable membrane to be ready for a second stimulus once it returns to its resting state following an excitation. It most commonly refers to ...
"Additional space at the ends of sentences is called 'French Spacing.' It is a very old practice, having been commonplace in books up through the 19th century" [7] "Adding two spaces after a period is called French spacing. French spacing was quite common in books before the 19th century. Later it became the norm for typewritten copy." [8]
Using cryo-electron microscopy it has been found that a much smaller periplasmic space is also present in Gram-positive bacteria (more accurately "monoderm"), between cell wall and the plasma membrane. [1] [2] The periplasm may constitute up to 40% of the total cell volume of gram-negative bacteria, but is a much smaller percentage in gram ...
"How many spaces should I leave after a period or other concluding mark of punctuation?". Modern Language Association. Archived from the original on 12 October 2006; Rhodes, John S. (13 May 1999). "One Versus Two Spaces After a Period". WebWord.com. Archived from the original on 9 March 2010; The Times (2010).
The secondary cell wall, a thick layer formed inside the primary cell wall after the cell is fully grown. It is not found in all cell types. It is not found in all cell types. Some cells, such as the conducting cells in xylem , possess a secondary wall containing lignin , which strengthens and waterproofs the wall.
The afterhyperpolarisation is one of the processes that contribute to the refractory period. Afterhyperpolarization, or AHP, is the hyperpolarizing phase of a neuron's action potential where the cell's membrane potential falls below the normal resting potential. This is also commonly referred to as an action potential's undershoot phase. AHPs ...
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The gap junction had been shown to create a micro-environment between the two cells in the extracellular space or gap. This portion of extracellular space was somewhat isolated from the surrounding space and also bridged by what we now call connexon pairs, which form even more tightly sealed bridges that cross the gap junction gap between two ...