Question

Choose the correct option for the statements given below.
Statement 1 - During inhalation the ribs exhibit upward and outward movement.
Statement 2 - The intercostal muscles attached to the ribs contract.

• A. Both statements are correct and statement 2 is the correct explanation of statement 1.
• B. Both statements are correct but statement 2 is not the correct explanation of statement 1.
• C. Statement 1 is correct but statement 2 is incorrect.
• D. Statement 1 is incorrect but statement 2 is correct.

Answer 1

The correct option is A Both statements are correct and statement 2 is the correct explanation of statement 1.

During inhalation the intercostal muscles attached to the ribs contract due to which the ribs exhibit upward and outward movement. This results in a decrease in pressure of the thoracic cavity and movement of the air into the lungs.

So, the correct answer is ‘Both statements are correct and statement 2 is the correct explanation of statement 1.’