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प्रश्न
Veins and arteries carry blood. Which of these carry blood back to the heart?
उत्तर
Veins carry blood back to the heart.
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संबंधित प्रश्न
Which of the following is the correct statement regarding bile?
State whether the following statement is true or false:
Energy can be produced in cells without oxygen.
Define breathing. State the differences between breathing and respiration.
What is meant by aquatic animals and terrestrial animals?
Describe the exchange of gases which takes place in the leaves of a plant
(a) during daytime, and (b) at night.
"Respiration is a vital function of the body". Justify this statements.
Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like humans?
One of the following organisms does not depend on the simple diffusion of gases for breathing and respiration. This organism is:
A, B and C are three living organisms. The organism A is a unicellullar fungus which can live without air. It is used in the commercial production of an organic compound P from molasses. The organism B is a unicellular animal which lives in water and feeds and moves by using pseudopodia. It breathes through an organelle Q. The organism C is a tiny animal which acts as a carrier of malarial parasite. It breathes and respires through a kind of tiny holes R and air-tubes S in its body.
(a) What are organisms (i) A (ii) B, and (iii) C?
(b) Name (i) P (ii) Q (iii) R, and (iv) S.
(c) Which organism/organisms undergo aerobic respiration?
(d) Which organism/organisms undergo anaerobic respiration?
Some sugar solution is taken in a test-tube and a little of substance X in powder form is added to it. The mouth of test-tube is closed with a cork and allowed to stand for sometime. On opening the cork, a characteristic smell of substance Y is obtained and a gas Z is also observed to be formed. The gas Z extinguishes a burning matchstick.
(a) What could be (i) X, (ii) Y, and (iii) Z?
(b) What is the process of converting sugar into substance Y by the action of X known as?
(c) What type of respiration is exhibited by X in the above process?
Answer this question.
Name the organ of respiration in fishes.
Choose the odd one out in the following groups of four items each:
Trachea, Bronchus, Alveolus, Diaphragm
Name the body structure concerned with the given functional activity:
Transports oxygen to the body cells.
Name the body structure concerned with the given functional activity:
Protects the lungs from mechanical injury
Answer the following question.
In the experimental set up to show that "CO2 is given out during respiration", name the substance taken in the small test tube kept in the conical flask. State its function and the consequence of its use.
term 'respiration' includes
What is the ppCO2 in alveolar air?
Which is the correct sequence of air passage during inhalation?
The oxygen dissociation curve is a sigmoid curve and it shifts towards the right due to ______.
