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A ligand produced by one cell binds to a receptor in the extracellular region of another cell, inducing a conformational change in the receptor. The shape of the cytoplasmic domain of the receptor changes, and the receptor acquires enzymatic activity. The receptor then catalyzes reactions that phosphorylate other proteins, activating them.
Metaplasia occurs when a cell of a certain type is replaced by another cell type, which may be less differentiated. It is a reversible process thought to be caused by stem cell reprogramming. Stem cells are found in epithelia and embryonic mesenchyme of connective tissue. A prominent example of metaplasia involves the changes associated with ...
Morphogenesis (from the Greek morphê shape and genesis creation, literally "the generation of form") is the biological process that causes a cell, tissue or organism to develop its shape. It is one of three fundamental aspects of developmental biology along with the control of tissue growth and patterning of cellular differentiation.
Bacterial morphological plasticity refers to changes in the shape and size that bacterial cells undergo when they encounter stressful environments. Although bacteria have evolved complex molecular strategies to maintain their shape, many are able to alter their shape as a survival strategy in response to protist predators, antibiotics, the immune response, and other threats.
Also, one cell could contain more than one nucleus due to fusion of multiple uninuclear cells. As a result, the variable cleavage of the cells will make the cells hard to be committed or determined to one cell fate. [23] At the end of cellularization, the autonomously specified cells become distinguished from the conditionally specified once.
Deadheading your plants—clipping off the spent blossoms—is a super-easy way to encourage flowers to bloom more. Here are some tips on how to deadhead correctly.
The change from one type of cell to another may be part of a normal maturation process, or caused by some sort of abnormal stimulus. In simplistic terms, it is as if the original cells are not robust enough to withstand their environment, so they transform into another cell type better suited to their environment.
Routine plant maintenance is anecessary part of raising healthy,happy flowers and shrubs.Two of the most common types of manualcare include deadheading and pruning.As its name implies, deadheading ...