Bowman's glands are found in :

1. olfactory epithelium 

2. external auditory canal 

3. cortical nephrons only 

4. juxtamedullary nephrons 

Unipolar neurons are found only in

1. early embryos

2. olfactory epithelium

3. retina of the eye

4. spinal cord

Which one of the following not act as a neurotransmitter?

1. Acetylcholine

2. Epinephrine

3. Nor epinephrine

4. Cortisone

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.

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

1. Potassium

2. Sodium

3. Magnesium

4. Manganese

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

A person showing unpredictable moods, outbursts of emotion, quarrelsome behaviour and

conflicts with others is suffering from :

1. schizophrenia

2. borderline personality disorder (BPD)

3. mood disorders

4. addictive disorders

Which of the following types of cells are found in retina ?

1. Neuroglial cell 

3. Schwann cell 

4. Amacrine cell

5. Purkinje cell

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