NEET Biology - New - Locomotion and Movement

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Question - 1

Smooth muscles are:

  • A Involuntary, fusiform, non-striated
  • B Voluntary, multinucleate, cylindrical
  • C Involuntary, cylindrical, striated
  • D Voluntary, spindle-shaped, uninucleate

Question - 2

It is much easier for a small animal to run uphill than for a large animal because

  • A The efficiency of muscles in large animals is less than in the small animals
  • B It is easier to carry a small body weight
  • C Smaller animals have a higher metabolic rate
  • D Small animals have a lower O2 requirement

Question - 3

The H-zone in the skeletal muscle fibre is due to:

  • A The absence of myofibrils in the central portion of A-band
  • B The central gap between myosin filaments in the A-band
  • C The central gap between actin filaments extending through myosin filaments in the A-band
  • D Extension of myosin filaments in the central portion of the A-band

Question - 4

Which one of the following pairs of chemical substances is correctly categorized?

  • A Calcitonin and thymosin - thyroid hormones
  • B Pepsin and prolactin - two digestive enzymes secreted in stomach
  • C Troponin and myosin - complex proteins in striated muscles
  • D Secretin and rhodopsin - polypeptide hormones

Question - 5

Which one of the following is correct pairing of a body part and the kind of muscle tissue that moves it?

  • A Abdominal wall-Smooth muscle fibres
  • B Abdominal wall-Smooth muscle
  • C Iris-Involuntary smooth muscle
  • D Heart wall-Involuntary unstriated muscle

Question - 6

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

  • A Calcium
  • B Magnesium
  • C Sodium
  • D Potassium

Question - 7

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

  • A X = 12,Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum.
  • B X = 12,Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two end.
  • C X = 24,Y = 7 True ribs are dorsal attached to vertebral column but are free on ventral side.
  • D X = 24,Y =.12 True ribs are dorsal attached to vertebral column but are free on ventral side.

Question - 8

Osteoporosis is an age-related disease of skeletal system may occur due to the:

  • A Immune disorder affecting neuromuscular junction leading to fatigue
  • B High concentration of Ca++ and Na +
  • C Decreased level of oestrogen
  • D Accumulation of uric acid leading to inflammation of joints

Question - 9

Which of the following joints would allow no movement?

  • A Fibrous joint
  • B Cartilaginous joint
  • C Synovial joint
  • D Ball and socket joint

Question - 10

Select the correct matching of the type of the joint with the example in human skeletal system.

  • A Type of joints Examples Cartilaginous joints Between frontal and parietal
  • B Type of joints Examples Pivot joint Between third and fourth cervical vertebrae
  • C Type of joints Examples Hinge joint Between humerus and pectoral girdle
  • D Type of joints Examples Gliding joint Between carpals