Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2017ZoologyLocomotion and MovementActual

Out of 'X' pairs of ribs in humans, only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:

Options

  1. AX = 12 , Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum
  2. BX = 12 , Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two ends
  3. CX = 24 , Y = 7 True ribs are dorsally attached to vertebral column but are free on ventral side
  4. DX = 24 , Y = 12 True ribs are dorsally attached to vertebral column but are free on ventral side

Correct answer

A. X = 12 , Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum

Step-by-step solution

In human, 12 pairs of ribs are present in which 7 pairs of ribs ( 1 s t to 7 t h pairs) are attached dorsally to the vertebral column and ventrally to the sternum. That is the reason, they are called as true ribs. There are false ribs and floating ribs in human thoracic cage bones.

Practice Locomotion and Movement on Quantrex Academy →

More from Locomotion and Movement

Which of the following represents the correct sequence of arrangement of bones in the lower limb of humans ? 2026The number of vertebrae in a human is __________. 2026Which of the following statements are correct with reference to human endoskeleton ? A. Human skull is monocondylic. B. The joint between any two adjoining vertebrae is a cartilagi 2026Choose the correct statements regarding muscle contraction. A. A motor neuron carries a signal sent by the Central Nervous System (CNS) to the sarcolemma of the muscle fibre. B. Th 2026Sperm motility is due to __________. 2026Match List I with List II related to muscular/skeletal system : List I List II A. Tetany I. Inflammation of joints B. Arthritis II. Autoimmune disorder affecting neuromuscular junc 2026Which of the following is the correct order of arrangement of vertebrate column from the head to toe ? 2026Select the correct statements regarding mechanism of muscle contraction. A. It is initiated by a signal sent by CNS via sensory neuron. B. Neurotransmitter generates action potenti 2024 Full Locomotion and Movement list All NEET PYQs