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Neural Control and Coordination · Question 48

AIPMT 2005MCQMedium📈 Topic in 0% papers+4−1
1

Which one of the following is an example of the action of the autonomic nervous system?

  1. Swallowing of food
  2. Pupillary reflex
  3. Peristalsis of the intestine
  4. Knee-jerk response

Answer

(3) Peristalsis of the intestine

Solution

As per NCERT, the autonomic neural system transmits impulses from the CNS to the involuntary organs and smooth muscles of the body.

⇒ Peristalsis is the involuntary wave-like contraction of the smooth muscles of the intestine, regulated by the autonomic (visceral) nervous system.

Swallowing begins as a voluntary act and the knee-jerk is a somatic spinal reflex of skeletal muscle.

∴ Peristalsis of the intestine is an example of the action of the autonomic nervous system.

Answer: (3)

AIPMT 2005

Keep practising — Neural Control and Coordination

2

In a man, abducens nerve is injured. Which one of the following functions will be affected?

  1. Movement of the eyeball
  2. Movement of the tongue
  3. Swallowing
  4. Movement of the neck
AIPMT 2005
3

Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter

  1. acetylcholine
  2. norepinephrine
  3. dopamine
  4. GABA
AIPMT 2005
4

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which of the cells are least likely to be replaced by new cells -

  1. Malpighian layer of the skin
  2. Osteocytes
  3. Neurons
  4. Liver cells
AIPMT 2005
5

In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive

  1. K+ into the cell
  2. K+ and Na+ out of the cell
  3. Na+ into the cell
  4. Na+ out of the cell.
AIPMT 2004
6

Injury to vagus nerve in humans is not likely to affect

  1. tongue movements
  2. gastrointestinal movements
  3. pancreatic secretion
  4. cardiac movements.
AIPMT 2004
7

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
8

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
9

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
10

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
11

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

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