Which one of the following not act as a neurotransmitter?

1. Acetylcholine

2. Epinephrine

3. Nor epinephrine

4. Cortisone

Subtopic:  Synapse |
 82%
NEET - 2006
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In a neuron the concentration of intracellular potassium and extracellular sodium is in a

ratio of

1. 1:1

2. 30:1

3. 10:1

4. 3:1

Subtopic:  Origin of Resting Membrane Potential |
From NCERT
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Pick the odd-one out.

1. Nervous tissue : node of Ranvier

2. Ear: aqueduct of Sylvius

3. Bone : Volkman's canal

4. Eye: canal of Schlemm

Subtopic:  Meninges, Ventricles & CSF |
 52%
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Though sensitive to entire visible spectrum, the cones in the human eye show sensitivity to

1. blue colour

2. green colour

3. red colour

4. all of these.

 60%
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Unipolar neurons are found only in

1. early embryos

2. olfactory epithelium

3. retina of the eye

4. spinal cord

Subtopic:  Nervous System |
 86%
From NCERT
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Which of the following types of cells are found in retina ?

1. Neuroglial cell 

3. Schwann cell 

4. Amacrine cell

5. Purkinje cell

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Which of the following minerals reduces the excitability of nerves and muscles?

1. Potassium

2. Sodium

3. Magnesium

4. Manganese

Subtopic:  Action Potential |
 55%
From NCERT
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Which of the following is a psychosomatic disorder?

1. Psychosis

2. Neurosis

3. Hypochondria

4. Schizophrenia

Subtopic:  Hind & Mid Brain | Diencephalon |
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A frog has its brain crushed. But when pinched on the leg. The leg draws away. It is an

example of

1. neurotransmitter induced responsce

2. simple reflex

3. conditioned reflex

4. automated motor response.

Subtopic:  Motor Functions of Spinal Cord |
AIIMS - 2001
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Which of the following pesticides is an acetylcholinesterase inhibitor?

1. Aldrin

2. BHC

3. Endosulfan

4. Malathion

Subtopic:  Synapse |
AIIMS - 2001
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