Loop in Biological Definition

Aseptic technique in microbiology

... specimen is to be transferred, an innoculating loop , and a fire source, all on a clean, preferably ... part of the flame. The person would not allow the loop to touch anything except the specimen itself, ... or flask, the person would use the innoculating loop with their writing hand to retrieve the specimen, ...

Kidney

... tubule . The next portion of the tubule is the loop of Henle , which leads to the distal convoluted tubule . The loop of Henle was named after Friedrich Gustav Jakob Henle who described it in the early 1860s. The loop of Henle maintains an osmotic gradient set up ...

Nephron

... of four sections: the proximal tubule , loop of Henle , distal tubule , and collecting duct ... 1 Bowman's capsule 2 Proximal tubule 3 loop of Henle 4 Distal tubule 5 Collecting ... of the original water content and volume. loop of Henle The ...

Ion channel

... move about and open the pore. Two of these six helices are separated by a loop that lines the pore and is the primary determinant of ion selectivity and ... subunits of one such other class, for example, consist of just this "P" loop and two transmembrane helices. The determination of their molecular ...

Alexander Fleming

... suggestion of the painter James McNeil Whistler . Fleming was admitted to the club after he made "germ paintings," in which he drew with a culture loop using spores of highly pigmented bacteria. The bacteria were invisible while he painted, but when cultured made bright colours. Serratia ...

Apoptosis

... members of the caspase family, and triggers the execution of apoptosis; while in other types of cells (type II), the Fas DISC starts a feed-back loop that spirals into increasing release of pro-apoptotic factors from mitochondria (see below), and the amplified activation of caspase-8. Downstream ...

Dialysis

... that can be made as well. When access has been setup, the patient is then connected to the preconfigured plumbing - creating a complete loop through the pump and filter. The pump and a timer are started. Hemodialysis is underway. Periodically (every half hour, nominally) blood pressure ...

Glucose

... monosaccharide containing six carbon atoms . Glucose is an aldehyde (contains a -CHO group). Five of the carbons plus an oxygen atom form a loop called a "pyranose ring", the most stable form for six-carbon aldoses . In this ring, each carbon is linked to hydroxyl and hydrogen side groups ...

Oncogene

... growth factors suddenly starts to do so (because it developed an oncogene), it will thereby induce its own uncontrolled proliferation ( autocrine loop ), as well as the proliferation of neighboring cells. Protein kinases and related proteins There are six known classes of protein kinases ...

Osmoregulation

... into Bowman's capsule or glomerular capsule (in the kidney's cortex) and flows down the proximal convoluted tubule to a "u-turn" called the loop of Henle (loop of the nephron) in the medulla portion of the kidney. reabsorption - most of the viscous glomerular filtrate is returned to blood ...

Potential energy

... Relation between potential energy and force Potential energy is closely linked with forces . If the work done going around a loop is zero, then the force is said to be conservative and it is possible to define a numerical value of potential associated with every point in space. ...

Prion

... idea is that prion propagation does not require direct action of a prion protein on a normal protein, but rather results from a positive feedback loop during the biosynthesis of PrP. In this view, the presence of PrP SC somehow alters the way in which PrP is synthesized, shunting it down an ...

Tobacco mosaic virus

... and an inner hole ~2nm. The protein coat consists of 158 aminoacids which are assembled into four main alpha-helices, which are joined by a prominent loop proximal to the axis of the virion. The RNA is located at a radius of ~4nm and is protected from the action of cellular enzymes by the coat protein. ...

Tobacco mosaic virus

... and an inner hole ~2nm. The protein coat consists of 158 aminoacids which are assembled into four main alpha-helices, which are joined by a prominent loop proximal to the axis of the virion. The RNA is located at a radius of ~4nm and is protected from the action of cellular enzymes by the coat protein. ...