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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
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
Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
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.
Name an animal which depends on simple diffusion of gases for breathing.
The trachea divides into tow tubes at its lower end. What is the name of these tubes?
What type of respiration takes place in human muscles during vigorous physical exercise? Give reason for your answer
Define breathing. State the differences between breathing and respiration.
Explain why, when air is taken in and let out during breathing, the lungs always contain a residual volume of air.
Explain why, it is dangerous to inhale air containing carbon monoxide.
Describe the process of respiration in the following part of a plant:
Root
Describe the process of respiration in the following part of a plant:
Stem
Describe the process of respiration in the following part of a plant:
Leaves
How are oxygen and carbon dioxide exchanged in our body during respiration?
Give the main points of difference between respiration in plants and respiration in animals.
Describe the exchange of gases which takes place in the leaves of a plant
(a) during daytime, and (b) at night.
Which contains more carbon dixoide : exhaled air or inhaled air? Why?
Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like humans?
Which of the following statements are true about respiration?
(i) during inhalation, ribs move inward and diaphragm is raised.
(ii) the gaseous exchange takes place in the alveoli.
(iii) haemoglobin has greater affinity for carbon dioxide than oxygen.
(iv) alveoli increase surface area of the exchange of gases
One of the following animals does not use tracheae as the respiratory organs. This animal is:
The photosynthesis in a plant is not taking place during the day time if the plant is releasing:
During marathon, we sometimes get painful contractions of leg muscles due to the accumulation of one of the following in leg muscles. This is:
Out of xylem and phloem, which one carries materials upwards as well as downwards?
Fill in the following blanks with suitable words:
The ___________ blood cells make antibodies whereas ___________ blood cells help in respiration.
There is a pair of bean-shaped organs P in the human body towards the back, just above the waist. A waste product Q formed by the decomposition of unused proteins in the liver is brought into organ P through blood by an artery R. The numerous tiny filters S present in organ P clean the dirty blood by removing the waste product Q. The clean blood goes into circulation through a vein T. The waste substance Q, other waste salts, and excess water form a yellowish liquid U which goes from organ P into a bag-like structure V through two tubes W. This liquid is then thrown out of the body through a tube X.
(a) What is (i) organ P, and (ii) waste substance Q?
(b) Name (i) artery R, and (ii) vein T.
(c) What are tiny filters S known as?
(d) Name (i) liquid U (ii) structure V (iii) tubes W, and (iv) tube X.
In the lungs what substance is removed from the body?
Out of xylem and phloem, which one carries materials only upwards?
Answer the following in detail.
Explain the process of Cellular Respiration.
Name the body structure concerned with the given functional activity:
Protects the lungs from mechanical injury
Given below is an example of a certain structure and its special functional activity:
"Kidney and excretion".
Fill in the blanks on a similar pattern.
Pleura and _____________.
State one function of the following:
Ciliated epithelium lining the respiratory tract
Given below is an overall chemical reaction of a certain process:
C6H12O6 →LacticAcid+2ATP+Heat energy
Name the process.
Complete the analogy.
Transport of CO2 by plasma : 7% :: Transport of CO2 by bicarbonate ions: ____________.
term 'respiration' includes
The Figure shown below represents an activity to prove the requirements for photosynthesis. During this activity, two healthy potted plants were kept in the dark for 72 hours. After 72 hours, KOH is kept in the watch glass in setup X and not in setup Y. Both these setups are air tight and have been kept in light for 6 hours. Then, Iodine Test is performed with one leaf from each of the two plants X and Y.
The function of KOH is to absorb ______.
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.
Visit a doctor. Find out about artificial respiration. Ask the doctor:
- When does a person need artificial respiration?
- Does the person need to be kept on artificial respiration temporarily or permanently?
- From where can the person get supply of oxygen for artificial respiration?
