Search results
Results from the WOW.Com Content Network
After a cell has established a resting potential, that cell has the capacity to undergo depolarization. Depolarization is the process by which the membrane potential becomes less negative, facilitating the generation of an action potential. [6] For this rapid change to take place within the interior of the cell, several events must occur along ...
The endothelium (pl.: endothelia) is a single layer of squamous endothelial cells that line the interior surface of blood vessels and lymphatic vessels. [1] The endothelium forms an interface between circulating blood or lymph in the lumen and the rest of the vessel wall.
Vasculogenesis occurs during embryonic development of the circulatory system. Specifically, around blood islands, which first arise in the mesoderm of the yolk sac at 3 weeks of development. [5] Vasculogenesis can also arise in the adult organism from circulating endothelial progenitor cells (derivatives of stem cells). These cells are able to ...
Several types of cells support an action potential, such as plant cells, muscle cells, and the specialized cells of the heart (in which occurs the cardiac action potential). However, the main excitable cell is the neuron, which also has the simplest mechanism for the action potential. [citation needed]
Osteocytes, the most common cell type within mature cortical bone, actively participate in the growth and maintenance of TCVs through the transfer of mitochondria to endothelial cells. Scanning electron microscopy images have revealed that osteocytes possess numerous dendritic processes with expanded, endfoot-like structures. These endfeet ...
The process of self-renewal occurs because of the signals the cells receive from the environment and the things the cell expresses to the environment (Fuchs & Chen 2013) . The signals and receptors must function properly at all times so the cells will know what they are supposed to do (Fuchs & Chen 2013).
This occurs by conversion of endothelial cells to hematopoietic stem and progenitor cells (HPSCs) - a process called endothelial-to-hematopoietic transition or EHT. These hematopoietic stem cells are further closely associated with endothelial cells throughout human life.
Upon entering the circulation, the cell (or clump of cells) travels through the circulatory system and eventually attaches to or becomes lodged within the blood vessel wall. This prompts a series of events that ends with the cell exiting circulation: The endothelial cells of the vessel recognize the cell through membrane-specific recognition ...