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Neural Control and Coordination · Question 46

AIPMT 2007MCQEasy📈 Topic in 25% papers+4−1
1

Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?

  1. Perikaryon and dendrites
  2. Nucleus and mitochondria
  3. Flagellum and medullary sheath
  4. Vacuoles and fibres

Answer

(1) Perikaryon and dendrites

Solution

As per NCERT, a neuron is made up of three major parts: cell body (perikaryon / cyton), dendrites and axon.

⇒ Nucleus and mitochondria are present in almost all eukaryotic cells; flagellum, vacuoles and fibres are not features of a neuron.

∴ Perikaryon and dendrites are the structures that distinguish a nerve cell from other cells.

Answer: (1)

AIPMT 2007

Keep practising — Neural Control and Coordination

2

Which one of the following does not act as a neurotransmitter?

  1. Cortisone
  2. Acetylcholine
  3. Epinephrine
  4. Norepinephrine
AIPMT 2006
3

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
AIPMT 2005
4

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
5

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
6

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
7

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
8

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
9

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
10

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
11

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

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