proximal definition biology
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Distal Home » Distal. Definition. adjective. (1) (anatomy) Characterized by being far from the point of anatomical reference. (2) (anatomy) Being situated far from the point of attachment to the body. (3) (dentistry) Describing a position directed away or farther from the midline and front of the jaw. Supplement.
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- 1 The first of these approaches defines what is called the distal stimulus. 2  This is the energy emitted by or reflected from some object. 3  A second approach focuses on the energy falling on a receptor surface. 4  This comprises what is known as the proximal stimulus.
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Zone of proximal development Since Vygotsky's original conception, the definition for the zone of proximal development has been expanded and modified. The zone of proximal development is an area of learning that occurs when a person is assisted by a teacher or peer with a skill set higher than that of the subject.he concept of the ZPD is widely used to study children's mental development as it relates to education. The ZPD concept is seen as a scaffolding, a structure of support points for performing an action.
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protist protist. n. 1. (Biology) (in some classification systems) any organism belonging to the kingdom Protista, originally including bacteria, protozoans, algae, and fungi, regarded as distinct from plants and animals. It was later restricted to protozoans, unicellular algae, and simple fungi.
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- Membrane: Membrane, in biology, the thin layer that forms the outer boundary of a living cell or of an internal cell compartment.
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- noun, Biology. 1. oriented movement of a motile organism toward or away from a gravitational force. Origin of geotaxis. 1960-1965.
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Prokaryote A prokaryote is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle. The word prokaryote comes from the Greek πρό (pro) before and κάρυον (karyon) nut or kernel. Prokaryotes are divided into two domains, Archaea and Bacteria.
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Anatomical terms of location The terms proximal (from Latin proximus, meaning 'nearest') and distal (from Latin distare, meaning 'to stand away from') are used to describe parts of a feature that are close to or distant from the main mass of the body, respectively.
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- semipermeable. adj. 1. (Biology) (esp of a cell membrane) selectively permeable. (ˌsɛm iˈpɜr mi ə bəl, ˌsɛm aɪ-). adj.emipermeable. adj. 1. (Biology) (esp of a cell membrane) selectively permeable. (ˌsɛm iˈpɜr mi ə bəl, ˌsɛm aɪ-). adj.
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Proximal tubule The proximal tubule is the portion of the duct system of the nephron of the kidney which leads from Bowman's capsule to the loop of Henle.he proximal tubule is the portion of the duct system of the nephron of the kidney which leads from Bowman's capsule to the loop of Henle.
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Terrestrial Of, pertaining to, or corresponding to land (on earth), as opposed to water and air. Supplement. The term terrestrial in biology is generally used to describe living organisms that live and grow on land. Living things that make use of nature as their habitat may be grouped based on where they live, grow and reproduce. Living things that spend most of their life on land are called terrestrial.
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Difference Between Distal and Proximal Proximal and distal are terms that are used to indicate distances from a standard point of reference. These are terms that are mostly used in the medical world and not used commonly in daily conversation.istal. In anatomical terms, distal is a point that is located farthest or far away from a standard point of reference. When a doctor uses the term distal to refer to a point in reference to a wound on the arm of his patient, he is referring to a point on the arm closer to the fingers past the wound.
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- In other words, it is what a child can do alone at a particular point in time. defined as that which a child can achieve if given the benefit of support during the task. Greener Journal of Social Sciences ISSN: 2276-7800 Vol. 3 (7), pp. Figure 1: A Model of the Zone of Proximal Development.
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Life The criteria can at times be ambiguous and may or may not define viruses, viroids, or potential artificial life as living. Biology is the primary science concerned with the study of life, although many other sciences are involved. The definition of life is controversial. The current definition is that organisms maintain homeostasis, are composed of cells, undergo metabolism, can grow, adapt to their environment, respond to stimuli, and reproduce. However, many other biological definitions have been proposed, and there are some borderline cases of life, such as viruses.
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Proximal Tubule Transport Book navigation. Proximal Tubule Transport. The proximal tubule is the major resorptive segment of the nephron and accounts for resorption of nearly two-thirds of all filtered water, sodium, and chloride. In addition, the proximal tubule is the segment where the majority of critical organic solutes such as glucose and amino acids are resorbed.
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Nearby words for protists Protists definition, any of various one-celled organisms, classified in the kingdom Protista, that are either free-living or aggregated into simple colonies and that have diverse reproductive and nutritional modes, including the protozoans, eukaryotic algae, and slime molds: some classification schemes also include the fungi and the more primitive bacteria and blue-green algae or may distribute the organisms between the kingdoms Plantae and Animalia according to dominant characteristics.
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- Proximal: Toward the beginning, the nearer of two (or more) items. For example, the proximal end of the femur is part of the hip joint, and the shoulder is proximal to the elbow. The opposite of proximal is distal. For a more complete listing of terms used in medicine for spatial orientation, please see the entry to  Anatomic Orientation Terms .
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Zone of Proximal Development The zone of proximal development (ZPD) has been defined as: the distance between the actual developmental level as determined by independent problem solving and the level of potential development as determined through problem solving under adult guidance, or in collaboration with more capable peers (Vygotsky, 1978, p. 86).
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Role of proximal tubules in the pathogenesis of kidney disease. The proximal tubules make up a significant portion of the kidneys; proximal tubule epithelial cells are the most populous cell type in the kidney, and carry out diverse regulatory and endocrine functions where numerous transporters are located.he proximal tubules make up a significant portion of the kidneys; proximal tubule epithelial cells are the most populous cell type in the kidney, and carry out diverse regulatory and endocrine functions where numerous transporters are located.
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- Abstract. During embryonic development of the amphibian, Xenopus laevis, the dorsal side of the embryo forms approximately opposite the sperm entry point, and the anterior and posterior axes are linked to this through the process of gastrulation.‐catenin (orange) accumulates in the cytoplasm on the prospective dorsal side of the embryo (right) opposite the sperm entry point (left). Green is autofluorescence of yolk. (Reproduced from Larabell et al. .
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- The cephalocaudal principle says that development progresses from top to bottom. The proximodistal principle says that development progresses from the center of the body outward. The orthogenetic principle says that development proceeds from the simple to the complex.
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polarity the specific orientation of processes and structures in space, which is inherent in organisms and leads to the appearance of morphological and physiological differences at opposite ends or on opposite sides of cells, tissues, organs, and the organism as a whole. Polarity is manifested with particular clarity in plants.
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Prokaryote A prokaryote is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle. The word prokaryote comes from the Greek πρό before and κάρυον nut or kernel. Prokaryotes are divided into two domains, Archaea and Bacteria. In contrast, species with nuclei and organelles are placed in the third domain, Eukaryota.. Prokaryotes reproduce without fusion of gametes. The first living organisms are thought to have been prokaryotes. In the ...
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Histology@ Yale Proximal Convoluted Tubule. The proximal convoluted tubule is the site where majority (65%) of ions and water in the urinary space is reabsorbed back into the body.
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A&P Ch. 1 The Human Body: An Orientation 1 Lateral – away from the midline of the body. 2  Intermediate – between a medial and lateral position. 3  Proximal – closer to the origin of the body part or point of attachment of a limb to the body trunk. 4  Distal – away from the origin of a body part or point of attachment of a limb to the body trunk.
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Proximal tubule The proximal tubule regulates the pH of the filtrate by exchanging hydrogen ions in the interstitium for bicarbonate ions in the filtrate; it is also responsible for secreting organic acids, such as creatinine and other bases, into the filtrate.n relation to the morphology of the kidney as a whole, the convoluted segments of the proximal tubules are confined entirely to the renal cortex. Some investigators on the basis of particular functional differences have divided the convoluted part into two segments designated S1 and S2.