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Prickle (other)
Prickle may refer to: *Thorns, spines, and prickles, a sharp, needle-like structures *Prickle cell of the skin *Prickle (protein), a planar cell polarity protein *The collective noun for a pack of porcupine Porcupines are large rodents with coats of sharp spines, or quills, that protect them against predation. The term covers two families of animals: the Old World porcupines of family Hystricidae, and the New World porcupines of family, Erethizont ...s * Prickle (''Gumby'' character), a character on ''The Gumby Show'' {{Disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thorns, Spines, And Prickles
In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called ''spinose teeth'' or ''spinose apical processes''), are hard, rigid extensions or modifications of leaves, roots, stems or buds with sharp, stiff ends, and generally serve the same function: physically deterring animals from eating the plant material. Description In common language the terms are used more or less interchangeably, but in botanical terms, thorns are derived shoots (so that they may or may not be branched, they may or may not have leaves, and they may or may not arise from a bud),Simpson, M. G. 2010. "Plant Morphology". In: ''Plant Systematics, 2nd. edition''. Elsevier Academic Press. Chapter 9.Judd, Campbell, Kellogg, Stevens, Donoghue. 2007. "Structural and Biochemical Characters". In: ''Plant Systematics, a phylogenetic approach, third edition''. Chapter 4. spines are derived from leaves (either the entire leaf or some part of the leaf that has vascular bundles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prickle Cell
Spinous cells, or prickle cells, are keratin producing Epidermis (skin), epidermal cells owing their prickly appearance to their numerous intracellular connections. They make up the Stratum spinosum, stratum spinosum (prickly layer) of the epidermis and provide a continuous net-like layer of protection for underlying tissue. They are susceptible to mutations caused by sunlight and can become malignant. Location Spinous cells are found in the superficial layers of the skin. They are found in the Stratum spinosum, stratum spinosum (prickly layer, spinosum layer), which lies above the Stratum basale, stratum basale (basal layer) and below the Stratum granulosum, stratum granulosum (granular layer) of the epidermis. The spinous cells are arranged several layers thick to form a net-like covering. Origin Spinous cells originate through mitosis in the basal layer (also known as the germinative layer). They are pushed upward into the stratum spinosum by the continuous formation of n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prickle (protein)
Prickle is also known as REST/NRSF-interacting LIM domain protein, which is a putative nuclear translocation receptor. Prickle is part of the non-canonical Wnt signaling pathway that establishes planar cell polarity. A gain or loss of function of Prickle1 causes defects in the convergent extension movements of gastrulation. In epithelial cells, Prickle2 establishes and maintains cell apical/basal polarity. Prickle1 plays an important role in the development of the nervous system by regulating the movement of nerve cells. The first prickle protein was identified in ''Drosophila'' as a planar cell polarity protein. Vertebrate prickle-1 was first found as a rat protein that binds to a transcription factor, neuron-restrictive silencer factor (NRSF). It was then recognized that other vertebrates including mice and humans have two genes that are related to ''Drosophila'' prickle. Mouse prickle-2 was found to be expressed in mature neurons of the brain along with mouse homologs of ''Dro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porcupine
Porcupines are large rodents with coats of sharp spines, or quills, that protect them against predation. The term covers two families of animals: the Old World porcupines of family Hystricidae, and the New World porcupines of family, Erethizontidae. Both families belong to the infraorder Hystricognathi within the profoundly diverse order Rodentia and display superficially similar coats of rigid or semi-rigid quills, which are modified hairs composed of keratin. Despite this, the two groups are distinct from one another and are not closely related to each other within the Hystricognathi. The largest species of porcupine is the third-largest living rodent in the world, after the capybara and beaver. The Old World porcupines (Hystricidae) live in Italy, Asia (western and southern), and most of Africa. They are large, terrestrial, and strictly nocturnal. The New World porcupines (Erethizontidae) are indigenous to North America and northern South America. They live in wooded area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
