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Neural Control and Coordination

AIPMT 2007MCQEasyNot asked in last 5 yrs+4−1
Ques. 1AIPMT 2007

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric change?

  1. First positive, then negative and continue to be negative
  2. First negative, then positive and continue to be positive
  3. First positive, then negative and again back to positive
  4. First negative, then positive and again back to negative

Answer

(4) First negative, then positive and again back to negative

Solution

As per NCERT, at rest the inner side of the axonal membrane is negatively charged (resting potential).

On stimulation, Na+ rush in ⇒ the inner side becomes positive (depolarisation, action potential).

Then K+ diffuse out ⇒ the inner side becomes negative again (repolarisation).

∴ The change is first negative, then positive and again back to negative.

Answer: (4)

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Ques. 2AIPMT 2007

Bowman's glands are located in the

  1. Anterior pituitary
  2. Female reproductive system of cockroach
  3. Olfactory epithelium of our nose
  4. Proximal end of uriniferous tubules
Ques. 3AIPMT 2007

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
Ques. 4AIPMT 2006

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

  1. Cortisone
  2. Acetylcholine
  3. Epinephrine
  4. Norepinephrine
Ques. 5AIPMT 2005

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
Ques. 6AIPMT 2005

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
Ques. 7AIPMT 2005

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
Ques. 8AIPMT 2005

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
Ques. 9AIPMT 2004

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.
Ques. 10AIPMT 2004

Injury to vagus nerve in humans is not likely to affect

  1. tongue movements
  2. gastrointestinal movements
  3. pancreatic secretion
  4. cardiac movements.
Ques. 11AIPMT 2003

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.

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