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प्रश्न
How are oxygen and carbon dioxide transported in human beings?
उत्तर
- Transport of Oxygen: The respiratory pigments (haemoglobin) present in red blood cells take up the oxygen from the air to the lungs. They carry the oxygen to tissues which are deficient in oxygen.
- Transport of carbon dioxide: Carbon Dioxide is more soluble in water. Hence, it is mostly transported from body tissues in the dissolved form in our blood plasma to lungs where it diffuses from blood to air in the lungs and then expelled out through nostrils.
संबंधित प्रश्न
What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
What would be the consequences of a deficiency of haemoglobin in our bodies?
Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
The mountaineers carry oxygen with them because ______.
Mention any two components of blood.
The exchange of respiratory gases in the cells of plants occurs by the process of _______________
(a) Osmosis
(b) Diffusion
(c) Glycolysis
(d) exhalation
What would happen if all the green plants disappear from the earth?
Name the pores in a leaf through which respiratory exchange of gases takes place.
Name the areas in a woody stem through which respiratory exchange of gases takes place.
State whether the following statement is true or false:
Energy can be produced in cells without oxygen.
Explain why, a land plant may die if its roots remain waterlogged for a long time.
"Respiration is a vital function of the body". Justify this statements.
During respiration, the exchange of gases takes place in:
Which of the following statements are correct?
(i) pyruvate can be converted into ethanol and carbon dioxide by yeast
(ii) fermentation takes place in the case of aerobic bacteria
(iii) fermentation takes place in mitochondria
(iv) fermentation is a form of anaerobic respiration
During marathon, we sometimes get painful contractions of leg muscles due to the accumulation of one of the following in leg muscles. This is:
Veins and arteries carry blood. Which of these carry blood away from the heart?
An animal in which the oxygenation of blood does not take place in the lungs is:
Tick the most appropriate answer.
The products of respiration are :
Answer the following in short.
Define respiration.
Answer the following in detail.
Explain the process of Cellular Respiration.
Choose the odd one out in the following groups of four items each:
Ethyl alcohol, Carbon dioxide, Starch, Oxygen
Choose the odd one out in each of the following groups of four items each:
Oxyhaemoglobin, Carbaminohaemoglobin, Hypoxia, Carboxyhaemoglobin
Name the body structure concerned with the given functional activity:
Transports oxygen to the body cells.
What is the normal percentage composition of gases in inspired and expired air respectively?
Which chemical compound inside a cell can be termed "Currency of Energy"?
Given below is an example of certain structure and its special functional activity:
"Kidney and excretion".
Fill in the blanks on a similar pattern.
Epiglottis and _____________.
State one function of the following:
Ciliated epithelium lining the respiratory tract
State one function of the following:
Mitochondria
State one function of the following:
Intercostal muscles
Differentiate between the following pairs on the basis of the aspect given in the brackets.
Tidal volume and Residual volume (Quantity of air)
Give Suitable Explanation for the Following :
Why do you shiver and why do your teeth chatter when it is very cold in winter?
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.
With regard to the respiratory system and the process of respiration in man, answer the following question:
What is meant by :
- Residual air and
- Dead air space
What is the ppCO2 in alveolar air?
Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:
Breathing is a process that
- provides O2 to the body.
- breaks down food to release energy.
- helps the body to get rid of CO2.
- produces water in the cells.
Which of the following gives the correct combination of functions of breathing?
On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.
With the reference to four gases CO2, CO, Cl2 and O2, which one of the options in the table is correct?
