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Find out the name of the following: a...

Find out the name of the following:
a. A chordate animal having flame cells as excretory structures
b. Cortical portions projecting between the medullary pyramids in the human kidney
c. A loop of capillary running parallel to the Henle's loop

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(a) Amphioxus is an example of a chordate that has flame cells as excretory structures. Flame cell is a type of excretory and osmoregulatory system.
(b) The cortical portions projecting between the medullary pyramids in the human kidney are the columns of Bertini. They represent the cortical tissues present within the medulla.
(c) A loop of capillary that runs parallel to Henle’s loop is known as vasa rectae. Vasa rectae, along with Henle’s loop, helps in maintaining a concentration gradient in the medullary interstitium.
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Name the following: b. Cortical portions projecting between the medullary pyramids in the human kidney. c. A loop of capillary running parallel to the Henle's loop.

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NCERT ENGLISH-EXCRETORY PRODUCTS AND THEIR ELIMINATION-EXERCISE
  1. Define Glomerular Filtration Rate (GFR)

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  2. Explain the autoregulatory mechanism of GFR.

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  3. Micturition is carried out by a reflex.

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  4. ADH helps in water elimination, making the urine hypotonic.

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  5. Protein-free fluid is filtered from blood plasma into the Bowman’s cap...

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  6. Henle’s loop plays an important role in concentrating the urine.

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  7. Glucose is actively reabsorbed in the proximal convoluted tubule.

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  8. Give a brief account of the counter current mechanism.

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  9. Describe the role of liver, lungs and skin in excretion.

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  10. Explain micturition.

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  11. Match the items of column I with those of column II:

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  12. What is meant by the term osmoregulation?

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  13. Terrestrial animals are generally either ureotelic or uricotelic, not ...

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  14. What is the significance of juxtaglomerular apparatus (JGA) in kidney ...

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  15. Find out the name of the following: a. A chordate animal having fla...

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  16. Ascending limb of Henle’s loop is to water whereas the descending limb...

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  17. Reabsorption of water from distal parts of the tubules is facilitated ...

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  18. Dialysis fluid contains all the constituents as in plasma except .

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  19. A healthy adult human excretes (on an average) gm of urea/day.

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