Free Excretory Products And Their Elimination (Daily Quiz: 7) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Free Excretory Products And Their Elimination (Daily Quiz: 7) Time:

Question-1

A malpighian corpuscle is

(a)

(b)

(c)

(d)


Question-2

Which of the following is incorrect about counter-current mechanism?

(a)

(b)

(c)

(d)


Question-3

Use of an artificial kidney during hemodialysis may result in
  1. Nitrogenous waste build-up in the body
  2. Non-elimination of excess potassium ions
  3. Reduced absorption of calcium ions from gastro-intestinal tract
  4. Reduced RBC production.
Which of the following options is the most appropriate ?

(a)

(b)

(c)

(d)

Explanation:

Answer: (d)

When kidneys are completely damaged and do not function, patient often receive hemodialysis (treatment with artificial kidney). The patient is connected to the machine by a tube attached to an artery often the radial artery. Blood from the artery is pumped into a tube that runs through the dialyser. The dialyser is filled with dialysing fluid which contains the same quantities of electolytes and nutrients as normal plasma but contains no waste products. The cellophane tube (a tube bounded by thin membrane) is kept in the dialysing fluid. The membrane of the cellophane tube is impermeable to blood cells and proteins but permeable to urea, uric acid, creatinine and mineral ions. So, these wastes diffuse from the blood to the dialysing fluid across the cellophane membrane.

However, since both kidneys are non-functional thus absorption of $Ca^{2+}$ from small intestine will be affected as coversion of vitamin D to calcitriol will not take place which is needed for calcium absorption from small intestine(GI tract). Erythropoietin production will also be affected, thus RBC production will be reduced.


Question-4

Which one of the following groups of structures/organs have similar function?

(a)

(b)

(c)

(d)


Question-5

Which one of the following statements is correct with respect to kidney function regulation?

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

Antidiuretic hormone (ADH) or vasopressin increases the reabsorption of water in the distal convoluted tubule, collecting tubules and collecting ducts of the nephrons of the kidneys. As a result, the reabsorption of water from the glomerular filtrate is increased. When someone drinks lot of water, requirement of absorption of water decreases, so ADH release is suppressed.


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