(a) Why is it important to prevent oxygenated and deoxygenated blood from mixing in birds and mammals?
(b) Which animals can tolerate some mixing of the oxygenated and deoxygenated blood streams? On what factor does the body temperature of these animals depend?
(a) Why is it important to prevent oxygenated and deoxygenated blood from mixing in birds and mammals?
(b) Which animals can tolerate some mixing of the oxygenated and deoxygenated blood streams? On what factor does the body temperature of these animals depend?
Official answer
(a) It is important to prevent oxygenated and deoxygenated blood from mixing in birds and mammals because they require a high concentration of oxygen for their metabolic activities. If the oxygenated and deoxygenated blood mix, the concentration of oxygen in the blood will decrease, leading to a decrease in the metabolic rate of the organism.
(b) Animals that can tolerate some mixing of the oxygenated and deoxygenated blood streams are those that do not require a high concentration of oxygen for their metabolic activities, such as fish and amphibians. The body temperature of these animals depends on the temperature of their surroundings.
Marking scheme
- 1.2 marks
Hint
Recall the structure and function of the circulatory system in birds and mammals and the factors that affect the body temperature of animals.
Quick oral answer
The separation of oxygenated and deoxygenated blood in birds and mammals is necessary to maintain a high concentration of oxygen in the blood, which is necessary for their high metabolic rate. Animals that can tolerate some mixing of the oxygenated and deoxygenated blood streams are those that do not require a high concentration of oxygen for their metabolic activities, such as fish and amphibians. The body temperature of these animals depends on the temperature of their surroundings.
Common mistakes
- 1.Confusing the circulatory system of birds and mammals with that of other animals.
Analysis and explanation
The question requires the student to understand the importance of separating oxygenated and deoxygenated blood in birds and mammals and the factors that affect the body temperature of animals that can tolerate some mixing of the oxygenated and deoxygenated blood streams.
Interesting facts
The separation of oxygenated and deoxygenated blood in birds and mammals allows for a high concentration of oxygen to be maintained in the blood, which is necessary for their high metabolic rate.
Question details
Q22 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2023
- Section
- Section B
- Marks
- 2
- Type
- Very Short Answer
- Chapter
- Life Processes
- Topic
- Respiration
- Bloom's level
- Understanding
- Syllabus topic
- Respiration in Organisms
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2023?
This question carries 2 marks in the CBSE Class 10 Science 2023 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Life Processes" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Respiration" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2023 paper?
This is a Very Short Answer question from Section B in the CBSE Class 10 Science 2023 paper.