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Neural Control and Coordination · Question 53

AIPMT 2004MCQMedium📈 Topic in 0% papers+4−1
1

Injury to vagus nerve in humans is not likely to affect

  1. tongue movements
  2. gastrointestinal movements
  3. pancreatic secretion
  4. cardiac movements.

Answer

(1) tongue movements

Solution

The vagus nerve (tenth cranial nerve) is a mixed nerve whose parasympathetic (visceral) fibres supply the heart, lungs and the gastrointestinal tract with its glands.

⇒ Its injury affects cardiac movements, gastrointestinal movements (peristalsis) and secretions such as pancreatic juice.

∵ Movements of the tongue are controlled by the hypoglossal nerve (twelfth cranial nerve), not by the vagus.

∴ Injury to the vagus nerve is not likely to affect tongue movements.

Answer: (1)

AIPMT 2004

Keep practising — Neural Control and Coordination

2

What used to be described as Nissl's granules in a nerve cell are now identified as

  1. cell metabolites
  2. fat granules
  3. ribosomes
  4. mitochondria.
AIPMT 2003
3

Which of the following statements is correct for node of Ranvier of nerve?

  1. Neurilemma is discontinuous
  2. Myelin sheath is discontinuous
  3. Both neurilemma and myelin sheath are discontinuous
  4. Covered by myelin sheath
AIPMT 2002
4

When we migrate from dark to light, we fail to see for some time but after a time visibility becomes normal. It is an example of

  1. accommodation
  2. adaptation
  3. mutation
  4. photoperiodism
Out of syllabusAIPMT 2001
5

Which of the following statements is the characteristic of human cornea?

  1. It is secreted by conjunctiva and glandular layer.
  2. It is a lacrimal gland which secretes tears.
  3. Blood circulation is absent in cornea.
  4. In old age it becomes the cause of cataract.
Out of syllabusAIPMT 2001
6

Depolarization of axolemma during nerve conduction takes place because of

  1. equal amount of Na+ and K+ move out across axolemma
  2. Na+ move inside and K+ move more outside
  3. more Na+ outside
  4. none of these
AIPMT 2000
7

Which food should be eaten during deficiency of rhodopsin in eyes?

  1. Carrot and ripe papayas
  2. Guava, banana
  3. Mango and potato
  4. None of the above
Out of syllabusAIPMT 2000

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