English Medium इयत्ता १० - CBSE Question Bank Solutions for Science

Draw a neat labelled diagram of the human excretory system.

What is the function of excretory system in humans?

Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.

Where is urine carried through ureters?

What is urethra?

What is meant by dialysis? What type of patients are put on dialysis?

Explain the principle of dialysis with the help of a labelled diagram.

If a patient is out on dialysis, he is most likely suffering from a severe ailment of the:
(a) circulatory system
(b) respiratory system
(c) excretory system
(d) digestive system

In which of the following are the largest amounts of nitrogen excreted from a mammalian body?
(a) breath
(b) sweat
(c) urine
(d) faeces

The excretory unit in the human excretory system is called:

The substance which is not reabsorbed into the blood capillaries surrounding the tuble of a nephron is mainly:
(a) glucose
(b) amino acid
(c) urea
(d) water

The procedure of cleaning the blood of a person by using a kidney machine is known as:
(a) ketolysis
(b) hydrolysis
(c) dialysis
(d) photolysis

The excretory organs in an earthworm are:
(a) nephridia
(b) nephrons
(c) raphides
(d) ureters

The organs A of a person have been damaged completely due to which too much of a poisonous waste material B has started accumulating in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to flow into long tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G, H and I in similar proportions to those in normal blood. As the person's blood passes through long tubes of substance E, most of the wastes present in it go into solution. The clean blood is then put back into a vein in the arm of the person for circulation.
(a) What are organs A?
(b) Name the waste substance B.
(c) What are (i) E, and (ii) F?
(d) Name G, H and I.
(e) What is the process described above known as?

Describe in brief how urine is produced in the human body.

The process of diffusion of solvent particles from the region of less solute concentration to a region of high solute concentration through a semi-permeable membrane is known as ____________.

Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?

In a person the tubule part of the nephron is not functioning at all. What will its effect be on urine formation?

“All plants give out oxygen during the day and carbon dioxide during the night”. Do you agree with this statement? Give a reason.

Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons.