What are gap junctions and how do they contribute to cell-cell signaling? Answer : Gap junctions are specialized connections that form a pore between adjacent cells, which permit small molecules and ions to move from one cell to another. In this way, gap junctions provide metabolic and electrical coupling between cells....
What are integrins and do they influence cell-cell signaling? Answer : Integrins are a diverse family of transmembrane proteins consisting of alpha and beta subunits that are found in all animal cells. Integrins link the actin cytoskeleton to the ... movement, and can thus influence actin cytoskeleton dynamics and intracellular signaling of neighboring cells....
List several general cellular processes regulated by receptor tyrosine kinases (RTKs). Answer : Cell growth, cell differentiation and cell survival (i.e. nutrient and stress signaling)....
Why do ion channels contribute to faster cellular responses than other signaling mechanisms, such as GPCR-mediated signaling? Answer : Ion channels generate electrical signals, which signals travel much more rapidly than chemical signals that depend on the process of molecular diffusion. An electrical signal can traverse the entire length of a nerve cell within milliseconds....
Mitochondria can be considered the ____________of the cell because they generate an enormous amount of cellular adenosine triphosphate (ATP) to fuel the cell. Answer : “Power plant” or “Power house”...
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