Question:
I. Observe both the diagrams A and B. Which diagram indicates inhalation? Describe how it occurs.
II. If diffusion were to move oxygen in our body, it is estimated that it would take 3 years for a molecule of oxygen to get to our toes from our lungs. Then, how is oxygen delivered to all parts of our body?
I. Observe both the diagrams A and B. Which diagram indicates inhalation? Describe how it occurs.
II. If diffusion were to move oxygen in our body, it is estimated that it would take 3 years for a molecule of oxygen to get to our toes from our lungs. Then, how is oxygen delivered to all parts of our body?
II. If diffusion were to move oxygen in our body, it is estimated that it would take 3 years for a molecule of oxygen to get to our toes from our lungs. Then, how is oxygen delivered to all parts of our body?
Show Hint
Look at the ribs and the diaphragm in each diagram. For part II, think of the pigment in red blood cells.
Updated On: Nov 3, 2026
Show Solution
Verified By Collegedunia
Solution and Explanation
Step 1: Part I: Pick the diagram for inhalation:
In diagram A, the ribs are lifted and the diaphragm is flattened. This is inhalation.
In diagram B, the ribs are lowered and the diaphragm is dome-shaped. This is exhalation.
Step 2: Part I: Describe how inhalation occurs:
1. The ribs get lifted (they move up and outward).
2. The diaphragm is flattened (it moves down).
3. Both changes make the chest cavity larger, so the air pressure inside the chest falls.
4. Air from outside is sucked in and fills the lungs.
Step 3: Part II: Why diffusion alone is not enough:
Diffusion is far too slow to move oxygen over long distances in a big body. A molecule would need about 3 years to reach the toes.
So the body uses a transport system, the blood, to carry oxygen quickly.
Step 4: Part II: How oxygen is delivered:
The respiratory pigment haemoglobin has a very high affinity for oxygen. It is present in the red blood corpuscles.
Haemoglobin picks up oxygen in the lungs. The heart then pumps this oxygen-rich blood to all the parts of the body.
Final Answer:
I. Diagram A shows inhalation, with ribs lifted and the diaphragm flattened. II. Haemoglobin in the blood carries oxygen, and the heart pumps it to all parts. \[ \boxed{\text{I. Diagram A; II. Haemoglobin in blood carries oxygen}} \]
In diagram A, the ribs are lifted and the diaphragm is flattened. This is inhalation.
In diagram B, the ribs are lowered and the diaphragm is dome-shaped. This is exhalation.
Step 2: Part I: Describe how inhalation occurs:
1. The ribs get lifted (they move up and outward).
2. The diaphragm is flattened (it moves down).
3. Both changes make the chest cavity larger, so the air pressure inside the chest falls.
4. Air from outside is sucked in and fills the lungs.
Step 3: Part II: Why diffusion alone is not enough:
Diffusion is far too slow to move oxygen over long distances in a big body. A molecule would need about 3 years to reach the toes.
So the body uses a transport system, the blood, to carry oxygen quickly.
Step 4: Part II: How oxygen is delivered:
The respiratory pigment haemoglobin has a very high affinity for oxygen. It is present in the red blood corpuscles.
Haemoglobin picks up oxygen in the lungs. The heart then pumps this oxygen-rich blood to all the parts of the body.
Final Answer:
I. Diagram A shows inhalation, with ribs lifted and the diaphragm flattened. II. Haemoglobin in the blood carries oxygen, and the heart pumps it to all parts. \[ \boxed{\text{I. Diagram A; II. Haemoglobin in blood carries oxygen}} \]
Was this answer helpful?
0
0
Top CBSE X Science Questions
- More than three million carbon compounds have been discovered in the field of chemistry. The diversity of these compounds is due to the capacity of carbon atoms for bonding with one another as well as with other atoms. Most of the carbon compounds are poor conductors of electricity and have low melting and boiling points.
- Human digestive system is a tube running from mouth to anus. Its main function is to breakdown complex molecules present in the food which cannot be absorbed as such into smaller molecules. These molecules are absorbed across the walls of the tube and the absorbed food reaches each and every cell of the body where it is utilised for obtaining energy.
- A student has three convex lenses A, B, and C of different focal lengths. He wants to observe the images formed by these lenses on a screen by placing a candle flame at different distances as given in the following table:
Case No. Lens Focal Length Object Distance 1 \(A\) 50 cm 25 cm 2 B 20 cm 60 cm 3 C 15 cm 30 cm - Consider the unbalanced chemical equations of the chemical reactions listed below:
- \(\text{CaO} + \text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2\)
- \(\text{Pb(NO}_3\text{)}_2 \rightarrow \text{PbO} + \text{NO}_2 + \text{O}_2\)
- \(\text{CuSO}_4 + \text{Fe} \rightarrow \text{FeSO}_4 + \text{Cu}\)
- \(\text{Na}_2\text{SO}_4 + \text{BaCl}_2 \rightarrow \text{BaSO}_4 + \text{NaCl}\)
- The maintenance functions of every living organism on the earth keeps going on even when they are not doing anything particular. The processes which together perform the job of maintenance of life are known as life processes. These processes are nutrition, respiration, transportation and excretion.
View More Questions
Top CBSE X Life Processes Questions
- The maintenance functions of every living organism on the earth keeps going on even when they are not doing anything particular. The processes which together perform the job of maintenance of life are known as life processes. These processes are nutrition, respiration, transportation and excretion.
- Identify the food chain in which the organisms of the second trophic level are missing :
- Assertion (A): Accumulation of harmful chemicals is maximum in the organisms at the highest trophic level of a food chain.
Reason (R) : Harmful chemicals are sprayed on the crops to protect them from diseases and pests. - Assertion (A): The rate of breathing in aquatic organisms is much faster than in terrestrial organisms.
Reason (R) :The amount of oxygen dissolved in water is very high as compared to the amount of oxygen in air. - (A) How is the movement of leaves of a sensitive plant different from the downward movement of the roots ?
OR
(B) There is a hormone which regulates carbohydrate, protein and fat metabolism in our body. Name the hormone and the gland which secretes it. Why is it important for us to have iodised salt in our diet?
View More Questions
Top CBSE X Questions
- Read the following source carefully and answer the questions that follow:
Print Comes to India
From 1780, James Augustus Hickey began to edit the Bengal Gazette, a weekly maga zine that described itself as ‘a commercial paper open to all, but influenced by none’. So it was private English enterprise, proud of its independence from colonial influence, that began English printing in India. Hickey published a lot of advertisements, including those that related to the import and sale of slaves. But he also published a lot of gossip about the Company’s senior officials in India. Enraged by this, Governor-General War ren Hastings persecuted Hickey, and encouraged the publication of officially sanctioned newspapers that could counter the flow of information that damaged the image of the colonial government. By the close of the eighteenth century, a number of newspapers and journals appeared in print. There were Indians, too, who began to publish Indian news papers. The first to appear was the weekly Bengal Gazette, brought out by Gangadhar Bhattacharya, who was close to Raja Rammohan Roy. - Read the following source carefully and answer the questions that follow:
Loans from Cooperatives
Besides banks, the other major source of cheap credit in rural areas are the cooperative societies (or cooperatives). Members of a cooperative pool their resources for coopera tion in certain areas. There are several types of cooperatives possible such as farmers cooperatives, weavers cooperatives, industrial workers cooperatives, etc. Krishak Coop erative functions in a village not very far away from Sonpur. It has 2300 farmers as members. It accepts deposits from its members. With these deposits as collateral, the Cooperative has obtained a large loan from the bank. These funds are used to provide loans to members. Once these loans are repaid, another round of lending can take place. Krishak Cooperative provides loans for the purchase of agricultural implements, loans for cultivation and agricultural trade, fishery loans, loans for construction of houses and for a variety of other expenses. - More than three million carbon compounds have been discovered in the field of chemistry. The diversity of these compounds is due to the capacity of carbon atoms for bonding with one another as well as with other atoms. Most of the carbon compounds are poor conductors of electricity and have low melting and boiling points.
- Human digestive system is a tube running from mouth to anus. Its main function is to breakdown complex molecules present in the food which cannot be absorbed as such into smaller molecules. These molecules are absorbed across the walls of the tube and the absorbed food reaches each and every cell of the body where it is utilised for obtaining energy.
- A student has three convex lenses A, B, and C of different focal lengths. He wants to observe the images formed by these lenses on a screen by placing a candle flame at different distances as given in the following table:
Case No. Lens Focal Length Object Distance 1 \(A\) 50 cm 25 cm 2 B 20 cm 60 cm 3 C 15 cm 30 cm
View More Questions