NEET Exam  >  NEET Questions  >  The exchange of gases in :i. the alveoli that... Start Learning for Free
The exchange of gases in :
i. the alveoli that lowers the pO2 of blood and raises its pCO2 is external respiration
ii. the tissues that lowers the pCO2 of blood and raises its pO2 is internal respiration
  • a)
    statement ii) is wrong and i) is correct.
  • b)
    both statements are correct.
  • c)
    statementi) is wrong and ii) is correct.
  • d)
    both statements are wrong.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The exchange of gases in :i. the alveoli that lowers thepO2of blood an...
In the alveoli, there is high pO2 , low pCO2 , lesser H+ concentration and lower temperature,
View all questions of this test
Most Upvoted Answer
The exchange of gases in :i. the alveoli that lowers thepO2of blood an...
Explanation:

The exchange of gases in the alveoli and tissues is a vital process in the respiratory system. Let's break down the statements and determine their accuracy:

i. The exchange of gases in the alveoli:
The alveoli are small air sacs located in the lungs where gas exchange takes place. Oxygen from the inhaled air diffuses across the thin walls of the alveoli and enters the bloodstream, while carbon dioxide, a waste product of cellular respiration, moves from the bloodstream into the alveoli to be exhaled.

- Lowering the pO2 of blood: When oxygen diffuses from the alveoli into the bloodstream, it increases the oxygen concentration in the blood, which raises the partial pressure of oxygen (pO2). Therefore, statement i) is incorrect as it states that the pO2 of blood is lowered during external respiration.

- Raising the pCO2 of blood: As carbon dioxide is produced during cellular respiration in the body's tissues, it diffuses from the bloodstream into the alveoli to be exhaled. This process decreases the carbon dioxide concentration in the blood, leading to a decrease in the partial pressure of carbon dioxide (pCO2). Therefore, statement i) is incorrect as it states that the pCO2 of blood is raised during external respiration.

ii. The exchange of gases in the tissues:
The exchange of gases in the tissues occurs between the capillaries and the cells. Oxygen-rich blood from the lungs is transported by the circulatory system to the body's tissues, where oxygen diffuses from the capillaries into the cells, providing the necessary oxygen for cellular respiration. At the same time, carbon dioxide produced by the cells diffuses into the capillaries to be transported back to the lungs for exhalation.

- Lowering the pCO2 of blood: As the cells utilize oxygen for cellular respiration, carbon dioxide is produced as a waste product. This carbon dioxide is transported by the blood back to the lungs to be exhaled. Therefore, statement ii) is correct as it states that the pCO2 of blood is lowered during internal respiration.

- Raising the pO2 of blood: As oxygen is utilized by the cells for cellular respiration, the oxygen concentration in the blood decreases. This leads to a decrease in the partial pressure of oxygen (pO2). Therefore, statement ii) is incorrect as it states that the pO2 of blood is raised during internal respiration.

Based on the explanation above, we can conclude that statement i) is incorrect and statement ii) is correct. Therefore, the correct answer is option 'C' - statement i) is wrong and ii) is correct.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Top Courses for NEET

The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer?
Question Description
The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer?.
Solutions for The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice The exchange of gases in :i. the alveoli that lowers thepO2of blood and raises itspCO2is external respirationii. the tissues that lowers thepCO2of blood and raises itspO2is internal respirationa)statement ii) is wrong and i) is correct.b)both statements are correct.c)statementi) is wrong and ii) is correct.d)both statements are wrong.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev