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प्रश्न
How are waste products excreted in Amoeba?
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उत्तर
Amoeba excretes excess carbon dioxide, water and ammonia. Carbon dioxide is excreted by diffusion through the cell membrane, while excess water and nitrogenous waste like ammonia is removed by the contractile vacuole.
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संबंधित प्रश्न
_____________ secreted by the (ii) _____________ lobe of the pituitary gland. If this hormone secretion is reduced, there is an increased production of urine. This disorder is called (iii) ____________. Sometimes excess glucose is passed with urine due to hyposecretion of another hormone called (iv) _____________ leading to the cause of a disease called (v) ______________.
Draw the well-labelled diagram of the human excretory system
Name the procedure used in the working of artificial kidney.
Name a waste gas released by the plants only during the night time.
Name the two waste products of the human body which are produced in the body cells.
A dialysis machine contains long tubes coiled in a tank containing dialysing solution
What does the dialysing solution contain?
Draw a neat labelled diagram of the human excretory system.
What is meant by dialysis? What type of patients are put on dialysis?
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?
Differentiate between
tannins and resins
Answer the following in short.
What is excretion?
Answer the following in short.
Define transpiration in plants.
Answer the following in detail.
Explain the process of transpiration. Describe some factors that affect it.
Name the following:
The outer region of kidney containing the Bowman's capsule.
Given below is a diagram of a human kidney, cut open longitudinally. Answer the following:
(i) Give definition of excretion.
(ii) Name the unit of kidney.
(iii) Why does the cortex of kidney show dotted appearance?
(iv) List the functions of the kidney.
Name the Following
The substance found in excess in the urine of a diabetic patient.
If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.
Certain organisms that are aquatic in habitat, tolerate only a narrow range of salinity. What term is given to such animals?
Given below is a list of substances - select the ones that need to be eliminated from the body.
Glucose, excess water, amino acids, urea, carbon dioxide, excess common salt, glycogen, uric acid.
Give two examples of the following:
Bile pigments
