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Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?
- a)Internal intercostal muscles relex and diaphragm contracts
- b)External intercostal muscles and diaphragm relax
- c)Internal intercostal muscles contract and diaphragm relax
- d)Internal intercostal muscles and diaphragma contract
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which of the following changes occur in diaphragm and intercostal musc...
During expiration, the internal intercostal muscles contract, and the diaphragm relaxes. This is because the internal intercostal muscles contracting and the diaphragm relaxing decreases the volume of the thoracic cavity. This in turn decreases the volume of the lungs.
Most Upvoted Answer
Which of the following changes occur in diaphragm and intercostal musc...
During expiration or exhalation, the volume of the thoracic cavity decreases, causing air to flow out of the lungs. This process is aided by the relaxation of the diaphragm and intercostal muscles.
Internal Intercostal Muscles Contract:
• The internal intercostal muscles, located between the ribs, contract during expiration.
• This contraction pulls the ribs downward and inward, decreasing the volume of the thoracic cavity.
Diaphragm relaxes:
• The diaphragm, a large dome-shaped muscle that separates the thoracic and abdominal cavities, relaxes during expiration.
• This relaxation causes it to move upwards, further decreasing the volume of the thoracic cavity.
Combined effect:
• The combined effect of the internal intercostal muscles contracting and the diaphragm relaxing results in a decrease in the volume of the thoracic cavity.
• This decrease in volume causes air to be forced out of the lungs, resulting in expiration.
Therefore, option C is the correct answer.
Internal Intercostal Muscles Contract:
• The internal intercostal muscles, located between the ribs, contract during expiration.
• This contraction pulls the ribs downward and inward, decreasing the volume of the thoracic cavity.
Diaphragm relaxes:
• The diaphragm, a large dome-shaped muscle that separates the thoracic and abdominal cavities, relaxes during expiration.
• This relaxation causes it to move upwards, further decreasing the volume of the thoracic cavity.
Combined effect:
• The combined effect of the internal intercostal muscles contracting and the diaphragm relaxing results in a decrease in the volume of the thoracic cavity.
• This decrease in volume causes air to be forced out of the lungs, resulting in expiration.
Therefore, option C is the correct answer.
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Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer?.
Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer?.
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Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?a)Internal intercostal muscles relex and diaphragm contractsb)External intercostal muscles and diaphragm relaxc)Internal intercostal muscles contract and diaphragm relaxd)Internal intercostal muscles and diaphragma contractCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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