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Locomotion and Movement · Question 23

NEET (UG) 2019MCQEasy📈 Topic in 25% papers+4−1
1

Select the correct option :

  1. Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum
  2. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs
  3. 8th, 9th and 10th pairs of ribs articulate directly with the sternum
  4. 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.

Answer

(2) There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs

Solution

As per NCERT, there are 12 pairs of ribs; each rib is a thin flat bone connected dorsally to the vertebral column.

⇒ The first seven pairs (true or vertebrosternal ribs) are connected ventrally to the sternum with the help of hyaline cartilage.

⇒ The 8th, 9th and 10th pairs do not articulate directly with the sternum but join the seventh rib with hyaline cartilage (vertebrochondral or false ribs).

⇒ The last two pairs (11th and 12th) are not connected ventrally (floating or vertebral ribs).

∴ (1), (3) and (4) are wrong; 7 + 3 + 2 pairs is correct.

Answer: (2)

NEET (UG) 2019

Keep practising — Locomotion and Movement

2

Which of the following muscular disorders is inherited?

  1. Myasthenia gravis
  2. Botulism
  3. Tetany
  4. Muscular dystrophy
NEET (UG) 2019
3

Calcium is important in skeletal muscle contraction because it

  1. detaches the myosin head from the actin filament
  2. binds to troponin to remove the masking of active sites on actin for myosin
  3. prevents the formation of bonds between the myosin cross bridges and the actin filament
  4. activates the myosin ATPase by binding to it
NEET 2018
4

Which of the following hormones can play a significant role in osteoporosis?

  1. Estrogen and parathyroid hormone
  2. Aldosterone and prolactin
  3. Progesterone and aldosterone
  4. Parathyroid hormone and prolactin
NEET 2018
5

The pivot joint between atlas and axis is a type of

  1. cartilaginous joint
  2. synovial joint
  3. saddle joint
  4. fibrous joint.
NEET 2017
6

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.

  1. X = 12, Y = 5; True ribs are attached dorsally to vertebral column and sternum on the two ends
  2. X = 24, Y = 2; The true ribs are dorsally attached to vertebral column but are free on ventral side
  3. X = 24, Y = 12; True ribs are dorsally attached to vertebral column but are free on ventral side
  4. X = 12, Y = 7; True ribs are attached dorsally to vertebral column and ventrally to the sternum
NEET 2017
7

Lack of relaxation between successive stimuli in sustained muscle contraction is known as

  1. tetanus
  2. tonus
  3. spasm
  4. fatigue.
NEET 2016 (Phase 1)
8

Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

  1. Calcium
  2. Magnesium
  3. Sodium
  4. Potassium
NEET 2016 (Phase 2)
9

Osteoporosis, an age-related disease of skeletal system, may occur due to

  1. immune disorder affecting neuromuscular junction leading to fatigue
  2. high concentration of Ca++ and Na+
  3. decreased level of estrogen
  4. accumulation of uric acid leading to inflammation of joints.
NEET 2016 (Phase 2)
10

Which of the following is not a function of the skeletal system?

  1. Production of body heat
  2. Locomotion
  3. Production of erythrocytes
  4. Storage of minerals
AIPMT 2015
11

Which of the following joints would allow no movements?

  1. Synovial joint
  2. Ball and Socket joint
  3. Fibrous joint
  4. Cartilaginous joint
AIPMT 2015

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