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Selina solutions for Class 10 Biology chapter 7 - The Excretory System (Elimination Of Body Wastes)

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Selina Selina ICSE Concise Biology Class 10

Selina ICSE Concise Biology for Class 10

Chapter 7: The Excretory System (Elimination Of Body Wastes)

Chapter 7: The Excretory System (Elimination Of Body Wastes) solutions [Page 0]

MULTIPLE CHOICE TYPE : 

Excretion primarily involves
(a) removal of all byproducts during catabolism
(b) removal by products during anabolism
(c) removal of nitrogenous wastes
(d) throwing out excess water 

MULTIPLE CHOICE TYPE : 

Maximum amount of water from the glomerular filtrate is reabsorbed in
(a) proximal convoluted tubule
(b) descending limbs of loop of Henle
(c) ascending limb of loop of Henle
(d) distal convoluted tubule 

MULTIPLE CHOICE TYPE : 

Which one of the following in real sense is NOT an excretory activity?
(a) giving out carbon dioxide
(b) passing out faecal matter
(c) sweating
(d) Removal of urea 

MULTIPLE CHOICE TYPE: 

In humans, urea is formed in
(a) ureter

(b) liver
(c) spleen 

(d) Kidney 

Chapter 7: The Excretory System (Elimination Of Body Wastes) solutions [Page 0]

Name the following : 

The organ which produces urea

Name the following: 

The outer region of kidney containing the Bowman’s capsule

Name the following: 

The tuft of capillaries inside the Bowman’s capsule 

Name the following : 

The part of kidney tubules where the term urine is first used for the fluid in it 

Name the following: 

The vein in which urea concentration is maximum 

Given below are two sets (a and b) of five terms each. Rewrite the terms in their correct order so as to be in logical sequence. 

Afferent arteriole, renal vein, capillary network, glomerulus, efferent arteriole. 

Given below are two sets (a and b) of five terms each. Rewrite the terms in their correct order so as to be in logical sequence. 

Renal artery, urethra, ureter, kidney, urinary bladder. 

In each one of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir. 

Glomerular filtrate, bowman’s capsule, ultrafiltration, glomerulus, blood plasma. 

In each one of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir 

Glomerular filtrate, bowman’s capsule, ultrafiltration, glomerulus, blood plasma. 

In each one of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir. 

ADH, Water, pituitary, osmoregulation, urine 

In each one of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir. 

CO2, bile pigments, water, excretion, urea. 

Chapter 7: The Excretory System (Elimination Of Body Wastes) solutions [Page 0]

Write down the functional activity of the following parts, 

Glomerulus ………………… 

Write down the functional activity of the following parts, 

Henle's loop ……………… 

Write down the functional activity of the following parts, 

Renal artery ……………… 

Write down the functional activity of the following parts, 

Renal artery ……………… 

Write down the functional activity of the following parts, 

Urethra …………………… 

 

Why is excretion necessary? Name the common excretory substance in our body. 

What is a uriniferous tubule? How does it function? 

Why is it necessary to maintain a normal osmotic concentration of the blood? 

If you donate one kidney to a needy patient, would it cause any harm to you? Give reason. 

In summer the urine is slightly thicker than in winter explain the reason. 

 

Differentiate between the following pairs of terms: 

Bowman’s capsule and malpighian capsule. 

Differentiate between the following pairs of term : 

Renal cortex and renal medulla 

Differentiate between the following pairs of term : 

Renal pelvis and renal papilla 

Differentiate between the following pairs of term : 

Urea and urine 

Differentiate between the following pairs of term : 

Excretion and katabolism 

Name the main nitrogenous metabolic waste excreted out by mammals including humans. 

Match the terms in Column I with those in Column II and write down the matching pairs 

  Column I  Column II
a Bowman's Capsule  Renal artery
b Contains more CO2 and less urea  Regulates amount of water excreted 
c Anti-diuretic hormone  Renal Vein
d Contains more urea  Glomerulus 

In a nephron, the ………….. flows through the ………….. under great pressure. The reason for this great pressure is that the ………….. (outgoing) ………….. is narrower than the ………….. (incoming). This high pressure causes the………….. part of the blood to filter out from the ………….. into the renal capsule. 

Chapter 7: The Excretory System (Elimination Of Body Wastes) solutions [Page 0]

Define the following term : 

Ultrafiltration 

Define the following term : 

Micturition 

Define the following term : 

Renal pelvis 

Define the following term:  

urea 

Define the following term : 

Osmoregulation 

Explain the terms ultrafiltration and selective absorption 

What is dialysis? Under what condition is it carried out? 

Chapter 7: The Excretory System (Elimination Of Body Wastes) solutions [Page 0]

Look at the figure given bellow, it is a section of human kidney as seen from the front.  

  

(a) Is it the left kidney or the right one? Give reason in support of your answer.
(b) Is it a longitudinal section or a cross-section?
(c) Name the parts numbered 1-5
(d) which area/part (give its name and the number given on the diagram) contains the following respectively:
(i) malpighian capsule
(ii) The pyramids
(iii) Freshly collected urine

Given alongside is the figure of certain organs and associated parts in the human body. Study the same and answer the questions that follow:
(a) Name all the organ systems shown completely or even partially
(b) name the parts numbered 1 to 5
(c) Name the structural and functional unit of the part marked ‘1’
(d) name the two main organic constituents of the fluid that flows down the part labelled ‘3’
(e) Name the two major steps involved in the formation of the fluid that passes down the part labelled ‘3’

 

The following diagram represents a mammalian kidney tubule (nephron) and its blood supply. 

 

Parts indicated by the guidelines 1 to 8 are as follows:
1. Afferent arteriole from renal artery
2. efferent arteriole
3. Bowman’s capsule
4. Glomerulus;
5. Proximal convoluted tubule with blood capillaries;
6. Distal convoluted tubule with blood capillaries;
7. collecting tubule;
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
(a) where does ultrafiltration take place?
(b) Which structure contains the lowest concentration of urea?
(c) Which structure contains the highest concentration of urea?
(d) Which structure (normally) contains the lowest concentration of glucose?
(e) where is most water reabsorbed?

Given alongside is a highly simplified (but also somewhat wrong) diagram of the human kidney cut open longitudinally. Answer the questions that follow.
(a) Define excretion 

(b) Name the functional units of the kidneys.
(c) Why does the cortex of the kidney show a dotted appearance?
(d) Mention two functions of the kidney.
(e) Write two differences in the composition of the blood flowing through the blood vessels, ‘A’ and ‘B’[There is an error in the diagram. Can you identify it?] 

 

 

Study the diagram given alongside and then answer the questions that follow:
(a) Name the region in the kidney where the above structure is present?
(b) Name the parts labelled 1, 2, 3 and 4.
(c) Name the stages involved in the formation of urine
(d) What is the technical term given to the process occurring in 2 and 3? Briefly describe the process. 

 

Chapter 7: The Excretory System (Elimination Of Body Wastes)

Selina Selina ICSE Concise Biology Class 10

Selina ICSE Concise Biology for Class 10

Selina solutions for Class 10 Biology chapter 7 - The Excretory System (Elimination Of Body Wastes)

Selina solutions for Class 10 Biology chapter 7 (The Excretory System (Elimination Of Body Wastes)) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Selina ICSE Concise Biology for Class 10 solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Class 10 Biology chapter 7 The Excretory System (Elimination Of Body Wastes) are Ultra-filtration, Parts of the Urinary System, Elementary Treatment of the Structure and Function of the Kidneys, Concept of Excretory System.

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