Mark the incorrect match?

1.	Cerebral aqueduct	$\to$	A canal passes through the midbrain, connecting 3rd ventricle to 4th ventricle of the brain.
2.	Corpus callosum	$\to$	Thick band of nerve fibres that divides the cerebral cortex lobes into left and right hemispheres.
3.	Limbic system	$\to$	The inner part of forebrain involved in the regulation of sexual behaviour.
4.	Pons	$\to$	Consist of fibre tracts that interconnect different regions of the brain.

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

'Retinal' is present in:

1.  Rods

2.  Cones

3.  Both 1 and 2

4.  All the retinal layer

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

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

1.  Macula

2.  Crista

3.  Cupula

4.  Organ of Corti

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

Myelin sheath is produced by:

Nissl bodies are mainly composed of:
1. Proteins and lipids
2. DNA and RNA
3. Nucleic acids and SER
4. Free ribosomes and RER