The diagrams show vertical sections of kidneys of coypu, brown rate and kangaroo rat, showing the relative size of cortex and medulla. Coypu are found in freshwater and never short of water to drink. Brown rats are able to go some days without drinking at all. Which kidney belongs to which animal?
Important Questions on Excretory Products and Their Elimination
Identify the correct match from the column I, II and III:
| Column I | Column II | Column III |
| (1) PCT | (a) Podocytes | (i) Small amount of urea enter into it |
| (2) The inner wall of bowman's capsule | (b) Simple squamous epithelium | (ii) Conditional reabsorption |
| (3) Thin ascending segment of loop of Henle | (c) Cuboidal epithelium with less brush border | (iii) Part of filtration membrane |
| (4) DCT | (d) Cuboidal epithelium with more brush border | (iv) Maximum reabsorption of salt and electrolytes |
Which of the following statement is/are true?
I. Glomerular filtrate is isotonic to plasma.
II. When the urine passes into collecting tubule, it becomes hypotonic.
III. Filtrate is isotonic in proximal convoluted tubule.
IV. Filtrate becomes more and more hypotonic as it passes through descending limb of Henle's loop. Choose the correct option
Which of the following features activates the JG cells?
I. Fall in Glomerular blood pressure
II. Fall in Glomerular blood flow
III. Fall in GFR
Choose the correct option
Read the following points :-
(i) Increases GFR
(ii) Increases B.P.
(iii) Decreases blood volume
(iv) Increases aldosterone secretion
(v) Vasoconstrictor
(vi) Increases Na ion excretion
How many points are correct about Angiotensin II?
(a) Aldosterone is released
(b) Kidney tubules reabsorb
(c) Renin is released
(d) Juxtaglomerular apparatus (JOA) recognises a drop in blood pressure.
(e) Angiotensin II is produced
