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Posted by Divya Tripathy 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
The counter current mechanism operating inside the kidney is the main adaptation for the conservation of water. There are two counter current mechanisms inside the kidneys. They are Henle’s loop and vasa rectae.
Henle’s loop is a U-shaped part of the nephron. Blood flows in the two limbs of the tube in opposite directions and this gives rise to counter currents. The Vasa recta is an efferent arteriole, which forms a capillary network around the tubules inside the renal medulla. It runs parallel to <st1:place w:st="on">Henley</st1:place>’s loop and is U-shaped. Blood flows in opposite directions in the two limbs of vasa recta. As a result, blood entering the renal medulla in the descending limb comes in close contact with the outgoing blood in the ascending limb.
Posted by Rudra Gupta 6 years, 11 months ago
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Meghna Thapar 5 years, 4 months ago
The first phase of mitosis within M phase is called prophase. It follows G2, the final phase of interphase. A cell entering M phase manifests a number of physicsl signs. ... Chromosome condensation is visible through a microscope and is required for subsequent chromosome separation during later stages of mitosis. During the mitotic (M) phase, the cell divides its copied DNA and cytoplasm to make two new cells. M phase involves two distinct division-related processes: mitosis and cytokinesis. ... Mitosis takes place in four stages: prophase (sometimes divided into early prophase and prometaphase), metaphase, anaphase, and telophase.
Posted by Vishwas Lodha 6 years, 11 months ago
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Gaurav Seth 6 years, 11 months ago
Continental shelf:
i. The continental shelf is the extended margin of each continent occupied by relatively shallow seas and gulfs. It is the
shallowest part of the ocean showing an average gradient of 1° or even less.
ii. The shelf typically ends at a very steep slope, called the shelf break. The width of the continental shelves vary from
one ocean to another.
iii. The average width of continental shelves is about 80 km. The shelves are almost absent or very narrow along some of
the margins like the coasts of Chile, the west coast of Sumatra, etc.
iv. On the contrary, the Siberian shelf in the Arctic Ocean, the largest in the world, stretches to 1,500 km in width. The
depth of the shelves also varies. It may be as shallow as 30 m in some areas while in some areas it is as deep as 600 m.
v. The continental shelves are covered with variable thicknesses of sediments brought down by rivers, glaciers, wind,
from the land and distributed by waves and currents. Massive sedimentary deposits received over a long time by the
continental shelves, become the source of fossil fuels.
Posted by Hritik Gupta 6 years, 11 months ago
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Gaurav Seth 6 years, 11 months ago
The angle of contact is defined as the angle that the tangent to the liquid surface at the point of contact makes with the solid surface inside the liquid.
Posted by Sakshi Tripathi 6 years, 11 months ago
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Gaurav Seth 6 years, 11 months ago
| It is a colorless fluid. | It is a reddish colored fluid. |
| It is part of the lymphatic system | It is part of the circulatory system |
| It helps in body defense and is a part of the immune system. | It is associated with the circulation of oxygen and carbon dioxide, nutrients hormones, waste products etc. |
| It contains plasma and a lesser number of WBCs and platelets. | It contains plasma, RBCs, WBCs, and platelets. |
| Carries less amount oxygen and digested food. | Carries more amount oxygen and digested food. |
| Lymph plasma lacks proteins. | Blood plasma consists of proteins, calcium, and phosphorus. |
| Transports nutrients from the tissue cells to the blood, through lymphatic vessels. | Transports nutrients and oxygen from one organ to another. |
| The flow of lymph is slow. | The flow of blood in the blood vessels is fast. |
| Clots slowly due to the presence of less fibrinogen. | Clots quickly due to the presence of more amount of fibrinogen. |
| The movement of lymph is in a single direction. | The movement of Blood is in a circular motion. |
Posted by Archit Jain 6 years, 11 months ago
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Anjali Gupta 6 years, 11 months ago
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Gaurav Seth 6 years, 11 months ago
There are two formulae for standard deviation.
{tex}s = \sqrt {\frac{{\sum {{{(X - \bar X)}^2}} }}{{n - 1}}}{/tex} (where n is the sample size).
The second formula is a re-arrangement which may make it better for calculation purposes.
{tex}s = \sqrt {\frac{{\sum {{X^2} - {{\frac{{(\sum {X)} }}{n}}^2}} }}{{n - 1}}}{/tex}
(where n is the sample size).
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