Choose the incorrect statement from the following given options.
1. In adults, each testis is oval in shape, with a length of about 4 to 5 cm.
2. Testis is covered by loose connective tissue.
3. Each testis has about 250 compartments called testicular lobules.
4. Temperature of testis within scrotum is lower than the normal internal body temperature.
Subtopic: Male Reproductive System |
77%
From NCERT
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Consider the given statements carefully.
(a) Malpighian tubules help in the removal of nitrogenous wastes and osmoregulation in Periplaneta.
(b) Flame cells are the excretory structure in Planaria as well as rotifers.
(c) Each kidney of an adult human measures 0.1 to 0.12 meters in width.
(d) Kidneys are situated between the level of the last thoracic and fourth lumbar vertebra.
Select the option with correct statements only:
1. (a), (b), (c), and (d)
2. (a) and (b)
3. (a), (c), and (d)
4. (a), (b), and (c)
(a) Malpighian tubules help in the removal of nitrogenous wastes and osmoregulation in Periplaneta.
(b) Flame cells are the excretory structure in Planaria as well as rotifers.
(c) Each kidney of an adult human measures 0.1 to 0.12 meters in width.
(d) Kidneys are situated between the level of the last thoracic and fourth lumbar vertebra.
Select the option with correct statements only:
1. (a), (b), (c), and (d)
2. (a) and (b)
3. (a), (c), and (d)
4. (a), (b), and (c)
Subtopic: Nitrogenous Excretory Products | Human Kidney: Location & Cut Section |
73%
From NCERT
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Read the following statements and choose the option that correctly states them as true (T) or false (F) with respect to the human excretory system:
(a) (b) (c)
1. F T T
2. T F F
3. F F T
4. F T F
| (a) | The cortex extends in between the medullary pyramids as calyx. |
| (b) | Vasa recta is absent or highly reduced in cortical nephrons. |
| (c) | Kidney is situated between the levels of the 12th thoracic and 3rd lumbar vertebra close to the dorsal inner wall of the abdominal cavity. |
1. F T T
2. T F F
3. F F T
4. F T F
Subtopic: Human Kidney: Location & Cut Section | Nephron Part 1 | Nephron Part 2 |
77%
From NCERT
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Select the correct statement from the following:
| 1. | Kidneys are reddish brown, round-shaped structures situated between the levels of the last thoracic and third lumbar vertebra. |
| 2. | Kidneys are close to the dorsal inner wall of the abdominal cavity. |
| 3. | Each kidney of adult human measures 0.5 - 0.7 m in width, 0.2 – 0.3 m in thickness with an average weight of 120 – 150 g. |
| 4. | Towards the centre of the inner convex surface of the kidney is a notch called the hilum through which the ureter, blood vessels, and nerves pass. |
Subtopic: Human Kidney: Location & Cut Section |
62%
From NCERT
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Identify the structure shown in the given figure and select the correct statements regarding it:
Statement I: The structure is a protonephridium and it plays an important role in excretion but not in osmoregulation.
Statement II: It is seen in Amphioxus, flatworms and rotifers.
1. Only Statement I
2. Only Statement II
3. Both Statement I and Statement II
4. Neither Statement I nor Statement I
Statement I: The structure is a protonephridium and it plays an important role in excretion but not in osmoregulation.
Statement II: It is seen in Amphioxus, flatworms and rotifers.
1. Only Statement I
2. Only Statement II
3. Both Statement I and Statement II
4. Neither Statement I nor Statement I
Subtopic: Nitrogenous Excretory Products |
66%
From NCERT
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Assertion (A): Counter current mechanism operates in juxta-medullary nephrons.
Reason (R): In juxta-medullary nephrons loop of Henle is present only in cortex region and in close proximity with vasa recta.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): In juxta-medullary nephrons loop of Henle is present only in cortex region and in close proximity with vasa recta.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Human Kidney: Location & Cut Section | Nephron Part 1 | Nephron Part 2 |
68%
From NCERT
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Assertion (A): Diabetes insipidus is marked by excessive urination and too much thirst.
Reason (R): Anti-Diuretic hormone (ADH) is released from posterior lobe of pituitary gland
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Anti-Diuretic hormone (ADH) is released from posterior lobe of pituitary gland
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Autoregulation of GFR | Micturition Reflex |
70%
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Assertion (A): In the descending limb of loop of Henle, the urine is hypertonic while in ascending limb of loop of Henle, the urine is hypotonic
Reason (R): Descending limb of loop of Henle is permeable to water, and ascending limb is impermeable to salts
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Descending limb of loop of Henle is permeable to water, and ascending limb is impermeable to salts
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nephron Part 1 | Nephron Part 2 |
58%
From NCERT
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Assertion (A): Atrial Natriuretic Factor is released by wall of atria.
Reason (R): It inhibits the release of renin from juxtaglomerular apparatus.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): It inhibits the release of renin from juxtaglomerular apparatus.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Autoregulation of GFR |
56%
From NCERT
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Identify the figure given below and select the incorrect match of the labelled parts A, B, C and D with their respective description.
| 1. | A | Urine produced by kidneys exit through this and passes into a common sac |
| 2. | B | During urination, urine is expelled from the bladder through this |
| 3. | C | Secretes antidiuretic hormone when blood osmolarity rises above a set point |
| 4. | D | Structure that stores urine |
Subtopic: Human Kidney: Functions | Human Kidney: Location & Cut Section | Autoregulation of GFR |
71%
From NCERT
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