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Select the correct events that occur during inspiration. [2020]
(i) Contraction of diaphragm
(ii) Contraction of external inter costal muscles
(iii) Pulmonary volume decreases
(iv) Intra pulmonary pressure increases
(i) Contraction of diaphragm
(ii) Contraction of external inter costal muscles
(iii) Pulmonary volume decreases
(iv) Intra pulmonary pressure increases
- a)(i), (ii) and (iv)
- b)Only (iv)
- c)(i) and (ii)
- d)(iii) and (iv)
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Select the correct events that occur during inspiration. [2020](i) C...
Inspiration is initiated by contraction of diaphragm which increases volume of thoracic chamber in antero-posterior axis and contraction of external inter –costal muscles which lifts up the ribs and sternum causing increases in volume of thoracic chamber in dorsoventral axis.
Most Upvoted Answer
Select the correct events that occur during inspiration. [2020](i) C...
During inspiration or inhalation, the following events occur:
Contraction of diaphragm:
- The diaphragm is a dome-shaped muscle that separates the thoracic and abdominal cavities.
- When it contracts, it flattens and moves downwards, increasing the volume of the thoracic cavity.
Contraction of external intercostal muscles:
- The external intercostal muscles are located between the ribs.
- When they contract, they move the ribcage upwards and outwards, increasing the volume of the thoracic cavity.
Pulmonary volume increases:
- The increase in thoracic volume leads to an increase in the volume of the lungs.
- This causes a decrease in intra-pulmonary pressure.
Intra-pulmonary pressure decreases:
- As the volume of the lungs increases, the pressure inside the lungs decreases.
- This decrease in pressure creates a pressure gradient that allows air to flow into the lungs.
Therefore, the correct events that occur during inspiration are (i) contraction of diaphragm and (ii) contraction of external intercostal muscles. Option (c) is the correct answer. Option (a) is incorrect because it includes "intra-pulmonary pressure increases," which is actually the opposite of what happens during inspiration. Option (b) is incorrect because it only includes "intra-pulmonary pressure increases," which is not a correct event during inspiration. Option (d) is incorrect because it includes "pulmonary volume decreases," which is the opposite of what happens during inspiration.
Contraction of diaphragm:
- The diaphragm is a dome-shaped muscle that separates the thoracic and abdominal cavities.
- When it contracts, it flattens and moves downwards, increasing the volume of the thoracic cavity.
Contraction of external intercostal muscles:
- The external intercostal muscles are located between the ribs.
- When they contract, they move the ribcage upwards and outwards, increasing the volume of the thoracic cavity.
Pulmonary volume increases:
- The increase in thoracic volume leads to an increase in the volume of the lungs.
- This causes a decrease in intra-pulmonary pressure.
Intra-pulmonary pressure decreases:
- As the volume of the lungs increases, the pressure inside the lungs decreases.
- This decrease in pressure creates a pressure gradient that allows air to flow into the lungs.
Therefore, the correct events that occur during inspiration are (i) contraction of diaphragm and (ii) contraction of external intercostal muscles. Option (c) is the correct answer. Option (a) is incorrect because it includes "intra-pulmonary pressure increases," which is actually the opposite of what happens during inspiration. Option (b) is incorrect because it only includes "intra-pulmonary pressure increases," which is not a correct event during inspiration. Option (d) is incorrect because it includes "pulmonary volume decreases," which is the opposite of what happens during inspiration.
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Select the correct events that occur during inspiration. [2020](i) C...
Iv option should also be correct
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Select the correct events that occur during inspiration. [2020](i) Contraction of diaphragm(ii) Contraction of external inter costal muscles(iii) Pulmonary volume decreases(iv) Intra pulmonary pressure increasesa)(i), (ii) and (iv)b)Only (iv)c)(i) and (ii)d)(iii) and (iv)Correct answer is option 'C'. Can you explain this answer?
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Select the correct events that occur during inspiration. [2020](i) Contraction of diaphragm(ii) Contraction of external inter costal muscles(iii) Pulmonary volume decreases(iv) Intra pulmonary pressure increasesa)(i), (ii) and (iv)b)Only (iv)c)(i) and (ii)d)(iii) and (iv)Correct answer is option 'C'. 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 Select the correct events that occur during inspiration. [2020](i) Contraction of diaphragm(ii) Contraction of external inter costal muscles(iii) Pulmonary volume decreases(iv) Intra pulmonary pressure increasesa)(i), (ii) and (iv)b)Only (iv)c)(i) and (ii)d)(iii) and (iv)Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select the correct events that occur during inspiration. [2020](i) Contraction of diaphragm(ii) Contraction of external inter costal muscles(iii) Pulmonary volume decreases(iv) Intra pulmonary pressure increasesa)(i), (ii) and (iv)b)Only (iv)c)(i) and (ii)d)(iii) and (iv)Correct answer is option 'C'. Can you explain this answer?.
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Select the correct events that occur during inspiration. [2020](i) Contraction of diaphragm(ii) Contraction of external inter costal muscles(iii) Pulmonary volume decreases(iv) Intra pulmonary pressure increasesa)(i), (ii) and (iv)b)Only (iv)c)(i) and (ii)d)(iii) and (iv)Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Select the correct events that occur during inspiration. [2020](i) Contraction of diaphragm(ii) Contraction of external inter costal muscles(iii) Pulmonary volume decreases(iv) Intra pulmonary pressure increasesa)(i), (ii) and (iv)b)Only (iv)c)(i) and (ii)d)(iii) and (iv)Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Select the correct events that occur during inspiration. [2020](i) Contraction of diaphragm(ii) Contraction of external inter costal muscles(iii) Pulmonary volume decreases(iv) Intra pulmonary pressure increasesa)(i), (ii) and (iv)b)Only (iv)c)(i) and (ii)d)(iii) and (iv)Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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