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NEETZoologyLocomotion and Movement

Read the following statements and choose the correct option: 1. A rib has two articulation surfaces on its dorsal end and is hence called bicephalic. 2. First seven pairs of ribs are called true ribs 3. The 8th, 9th and 10th pairs of ribs do not articulate directly with the sternum. 4. The first 7 pair of ribs are called vertebrochondral (false) ribs. 5. Last 2 pairs (11th and 12th) of ribs are called floating ribs

Options

  1. ABoth 2 and 4 are correct
  2. BAll are correct except 4
  3. CAll are incorrect
  4. DBoth 1 and 5 are correct

Correct answer

B. All are correct except 4

Step-by-step solution

It has two articulation surfaces on its dorsal end and is hence called bicephalic. First seven pairs of ribs are called true ribs. Dorsally, they are attached to the thoracic vertebrae and ventrally connected to the sternum with the help of hyaline cartilage. The 8th, 9th and 10th pairs of ribs do not articulate directly with the sternum but join the seventh rib with the help of hyaline cartilage. These are called vertebrochondral (false) ribs. Last 2 pairs (11th and 12th) of ribs are not connected ventrally and ar

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