Advertisements
Advertisements
Question
Why do fishes die when taken out of water?
Solution
Fish do not have lungs that can utilise the oxygen of the air for breathing and respiration. The fish have gills. Gills can only extract the dissolved oxygen from water and provide it to the fish. Gills cannot take in the oxygen from the air. Since fish do not get oxygen for breathing when taken out of water, they die.
APPEARS IN
RELATED QUESTIONS
Given below are the end products of different reactions involving glucose.
Write the reaction number in front of the following:
(i) Anaerobic reaction =
(ii) Reaction in the human muscles =
(iii) Aerobic respiration =
(iv) Reaction in the plant cells =
(v) Reaction in the liver
What are the different ways in which glucose is oxidized to provide energy in various organisms?
Where does the blood absorb oxygen in the human body?
Name the red pigment which carries oxygen in blood.
Describe the process of respiration in fish.
When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of:
Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to the conversion of pyruvate to:
The photosynthesis in a plant is not taking place during the day time if the plant is releasing:
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?
Consider the following chemical reactions which take place in different organisms/tissues under various conditions:
(i) Glucose → Respiration ">Ethanol + Carbon dioxide + Energy
(ii) Glucose→ Respiration ">Carbon dioxide + Water + Energy
(iii) Glucose → Respiration "> Lactic acid + Energy
(a) Name one organism which respires according to equation (i) above.
(b) Name one organism which respires according to equation (ii) above.
(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f) Which of the above reactions produces the maximum amount of energy?
In the lungs what substance is removed from the body?
State one function of the following:
Ciliated epithelium lining the respiratory tract
State one function of the following:
Pleural fluid
With regard to the respiratory system and the process of respiration in man, answer the following question :
Give the overall chemical equation to represent the process of respiration in humans.
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.
Lack of oxygen in muscles often leads to cramps among cricketers. This results due to:
Glycolysis process occurs in which part of the cell?
Which of the following is an incorrect statement?
Match the correct answers with the type of respiration and respiratory substances.
| Respiration | Types of Substrates |
| A. Floating respiration | I. Proteins |
| B. Cytoplasmic respiration | II. Glucose |
| C. Protoplasmic respiration | III. Carbohydrates and fats |
Visit a local doctor. Learn about the harmful effects of smoking. You can also collect material on this topic from other sources. You can seek help of your teacher or parents. Find out the percentage of people of your area who smoke. If you have a smoker in your family, confront him with the material that you have collected.
