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NEET MDS Quiz - Practice Test
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Practice Test

All Subjects - 3 Questions

1
General Medicine

What is the treatment of choice for growth hormone deficiency in children?
1) Thyroid hormone replacement
2) Growth hormone replacement therapy
3) Testosterone supplementation
4) Estrogen therapy

📝 Explanation:

The treatment of choice for growth hormone deficiency in children is recombinant human growth hormone (HGH) replacement therapy. This therapy helps to stimulate growth and can help children with growth hormone deficiency reach a more normal height. The other options listed are treatments for different hormonal imbalances and are not typically used for growth hormone deficiency unless there is a coexisting condition requiring them.

2
Oral Surgery
Sensitivity to local anaesthetics is greater in
1) Type B fibres
2) Type C fibres
3) Type A delta fibres
4) Fibres supplying the muscle spindles

📝 Explanation:

Local anaesthetics act by blocking voltage‑gated sodium channels, preventing depolarization and conduction of nerve impulses. The sensitivity of different nerve fibres depends on their diameter, myelination, and conduction velocity.

  • Type B fibres

    • Small, myelinated preganglionic autonomic fibres.

    • Moderately sensitive to local anaesthetics.

  • Type C fibres

    • Smallest, unmyelinated fibres.

    • Carry dull, aching pain and temperature sensations.

    • Most sensitive to local anaesthetics because of their small diameter and lack of myelin.

  • Type A‑delta fibres

    • Small, thinly myelinated fibres.

    • Carry sharp, pricking pain.

    • Less sensitive than Type C fibres but more sensitive than larger A‑alpha fibres.

  • Fibres supplying muscle spindles (Type A‑alpha fibres)

    • Large, heavily myelinated fibres.

    • Conduct proprioception and motor signals.

    • Least sensitive to local anaesthetics due to their large diameter and thick myelin sheath.

 Local anaesthetics preferentially block small, unmyelinated fibres first (Type C), followed by small myelinated fibres (Type B, A‑delta). Large myelinated fibres (A‑alpha) are blocked last. This explains why pain sensation is lost before motor function during local anaesthesia.

3
Prosthodontics
The most common reason why hyperplastic tissue is removed or reduced during construction of a complete denture because 
 1. It interferes with the arrangement of the teeth
 2. It is unaesthetic to construct a denture on a hyperplastic tissue
 3. It interferes with the stability of the denture
 4. All of the above

📝 Explanation:

The most common reason why hyperplastic tissue is removed or reduced during the construction of a complete denture is that it interferes with the stability of the denture.

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