What is the function of nephridia in an earthworm?
Explain the terms ultrafiltration and selective absorption.
Which among the following substances are reabsorbed in nephron?
Glucose, amino acids and NaCl
Urea, uric acid, amino acid
Glucose, urea, creatinine
KCl, urea, glucose
About 180 litre of filtrate is produced each day but only 1.5 litre urine is excreted out .Justify this.
What is the role of glomerulus in the kidney ?
With the help of well labelled diagram describe the structure of the nephron.
Which organ of the human body purifies blood?
The given diagram represents a nephron and its blood supply. Study the diagram and answer the following questions:
(a) Label parts 1, 2, 3 and 4.
(b) State the reason for the high hydrostatic pressure in the glomerulus.
(c) Name the blood vessel which contains the least amount of urea in this diagrams.
(d) Name the two main stages of urine formation.
(e) Name the part of the nephron which lies in the renal medulla.
- renal corpuscle
- renal tubule
What is the difference between proximal tubule and distal tubule? Why should there be a difference? Can't there just be one tubule?
Why is urine slightly thicker in summer than in winter
(a) Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
(b) Where is urine carried through ureters ?
(c) What is urethra ?
Describe in brief how urine is produced in human body.
Differentiate between the Renal cortex and the Renal medulla.
Which of the following substances are not present in the initial filtrate of nephron?
What happens to the glucose which enters the nephron tubule along with the filtrate ?
The correct sequence of urine formation in human body is:
Glomerular filteration → selective reabsorption → tubular secretion
Tubular filtration → Selective reabsorption → Tubular secretion
Selective reabsorption → Glomerular filtration → Tubular secretion
Glomerular secretion → selective secretion → tubular reabsorption
The renal corpuscle is composed of the glomerulus and _______ .
proximal convoluted tubule
loop of Henle
distal convoluted tubule
- malphigian tubule
- renal lobe
- renal corpuscle
- renal tubule
Which of the following is not a function of the excretory system?
Removal of waste products from the blood stream.
Regulation of leukocyte and platelet production.
Regulation of blood volume.
Storage and excretion of urine.
Which portion of the nephron extends into the medulla?
Proximal convoluted tube
Distal convoluted tube
Which of the following is completely reabsorbed in the kidneys?
Which one of the following is not a part of the renal pyramid?
(b) Trace the movement of oxygenated blood in the body.
(c) Write the function of valves present in between atria and ventricles.
(d) Write one structural difference between the composition of artery and veins.
(a) Define excretion.
(b) Name the basic filtration unit present in the kidney.
(c) Draw excretory system in human beings and label the following organs of excretory system which perform the following functions :
(i) forms urine.
(ii) is a long tube which collects urine from kidney.
(iii) Store urine until it is passed out.
What are two examples of diffusion in the human body?
The substance which is not reabsorbed into the blood capillaries surrounding the tubule of a nephron is mainly :
(b) amino acid
What electrolytes do the kidneys regulate?
Which among the following substances are reabsorbed in the nephron?
Urea, Uric acid, Amino acid
Glucose, Amino acids, Salts
Glucose, Urea, Creatinine
KCl, Urea, Glucose
What is the excretory organ of Hydra?