In cochlea, the auditory receptors are:

1. Organ of Corti

2. Ampulla

3. Macula

4. Hair cells

Consider the characteristics of a certain part of the human brain:
I. It contains neurosecretory cells.
II. It is an important part of the limbic system.
III. It is a part of the diencephalons.

This part of the human brain is:

1. Hypothalamus

2. Medulla oblongata

3. Cerebellum

4. Amygdala

Consider the following statements.

(a) Occurs involuntarily and without conscious effort.
(b) At least no afferent and two efferent neuron required.
(c) Only motor neuron is involved in the action.
(d) Polysynaptic and conditional reflex.
(e) Regulated by the spinal cord.

Which of the above statements are correct for the reflex shown in the above figure?

1.  a and e

2.  b, c and d

3.  a, b, d and e

4.  a, b, c, d and e

The specific receptor organ in the otolith organ of the internal ear is called:

1.  Macula

2.  Crista

3.  Cupula

4.  Organ of Corti

The resting axonal membrane of a neuron:

1.  is not polarized

2.  has an excess of anions on the outside

3.  is more permeable to potassium ions than to sodium ions

4.  cannot be excited by a stimulus

'Retinal' is present in:

1.  Rods

2.  Cones

3.  Both 1 and 2

4.  All the retinal layer

The vestibular apparatus is composed of:

I.   Semi-circular canals

II.  Otolith organs

III. Organ of Corti

IV. Crista and macula

1.  I, II, III & IV

2.  I, II only

3.  IV only

4.  II only

Mark the incorrect match?

Myelin sheath is produced by:

1. Astrocytes and Schwann cells

2. Oligodendrocytes and Osteoclasts

3. Osteoclasts and Astrocytes

4. Schwann cells and Oligodendrocytes

Nissl bodies are mainly composed of: