Five events in the transmission of nerve impulse across the synapse -
A. Opening of specific ion channels allows the entry of ions, a new action potential is generated in the post-synaptic neuron

B. Neurotransmitter binds to the receptor on post-synaptic membrane.

C. Synaptic vesicle fuses with pre-synaptic membrane, neurotransmitter releases into synaptic cleft

D. Depolarization of pre-synaptic membrane

E. Arrival of an action potential at the axon terminal

In which sequence do these events occur?

1. E$\to$ D$\to$ C $\to$B $\to$A
2. A $\to$B $\to$C $\to$D$\to$ E
3. A $\to$B $\to$D $\to$C $\to$E
4. E $\to$D $\to$C $\to$A $\to$B

Mark the correct statement:
1. Electrical synapses are more common in our neural system than chemical synapses.
2. The new potential in the post-synaptic neurons may be either excitatory or inhibitory.
3. Hypothalamus is the major coordination centre for sensory and motor signaling.
4. The tracts of nerve fibres that connect two cerebral hemispheres are called corpora bigemina.

Go through the following characterization of Sympathetic and. Parasympathetic Nervous System.
I. Dilates pupil,
II. $\uparrow$ Heart rate, BP (Vasoconstriction) $\uparrow$ Glycogenolysis, dilates bronchi.
III. Constricts pupil.
IV. Induces ejaculation.
V. $\uparrow$Gastric secretion, $\uparrow$ salivary secretion, $\uparrow$peristalsis.
VI. Erection and urination.
1. Sympathetic - III, V, VI; Parasympathetic - I, II, IV
2. Sympathetic - I, II, IV; Parasympathetic - III, V, VI
3. Sympathetic M II, IV, VI; Parasympathetic - I, III, V
4. Sympathetic - I, III, V; Parasympathetic - II, IV, VI

Human body temperature is regulated by the centre located in:

1. Cerebrum                 

2. Cerebellum

3. Medulla                   

4. Hypothalamus

In the human eye, there are three types of cones – red, blue, and green. When these cones are stimulated equally, a sensation for which of the following colors would be produced?
1. White
2. Black
3. Orange
4. Yellow

The vomiting center in the humans is located in the:
1. Medulla oblongata
2. Pons varolii
3. Hypothalamus
4. Thalamus

Most of the neurons in the cerebral cortex are:

1. Unipolar

2. Bipolar

3. Multipolar

4. Pseudo unipolar

The number of correct statements amongst the given statements is:

I. Somatic neural system relays impulses from the CNS to smooth muscles of the body.

II. Myelinated nerve fibers are found in spinal nerves but not in cranial nerves.

III. Sodium-potassium pump transports 3 sodium outwards and 2 potassium into the cell.

IV. Electrical synapses are rare in our system.

V. Efferent neurons carry signals from the CNS to the effector.

   1.  2         

   2.  3

   3.  4         

   4.  5

In the given diagram of cochlea, the tectorial membrane is represented by the letter:

            1.  A                   

            2.  B

            3.  C                 

            4.  D

Mark the incorrect match?