Five events in the transmission of nerve impulse across the synapse are given:

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 action potential at axon terminal.

In which sequence do these events occur?
1. E → D → C → B → A
2. A → B → C → D → E
3. A → B → D → C → E
4. E → D → C → A → B

Match each item in Column I with one item in Column II and choose your answer from the codes given below:

Codes :

Consider the following statements:

I. A motor neuron along with the muscle fibers connected to it constitute a motor unit

II. The neurotransmitter released at the neuro-muscular junction is Acetylcholine.

III. Myosin head has ATPase activity

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II, and III

___A___ is a major coordinating centre for sensory and motor signaling present in the forebrain of the central nervous system. Here ‘A’ is:

1. Association area
2. Thalamus
3. Pons
4. Hypothalamus

In chemical synapse, postsynaptic membrane receptor
binds with
1. Excitatory neurotransmitter.
2. Inhibitory neurotransmitter.
3. Ca⁺⁺ ions.
4. Both 1 and 2

Which of the following is/are controlled by the human brain ?

a. Balance of the body

b. Circadian rhythm of the body

c. Human behaviour

d. Functioning of heart and kidneys

1. Only d

2. a and d

3. a,b and c

4. a,b,c,d

Restoration of resting potential of the membrane at the site of excitation is achieved by:-

1. Diffusion of K${}^{+}$ outside the membrane
2. Diffusion of Na${}^{+}$ outside the membrane
3. Diffusion of K${}^{+}$ inside the membrane
4. Diffusion of Na${}^{+}$ inside the membrane

Read all statements carefully and identify the number of correct ones:

1. One

2. Two

3. Three

4. Four

Mark the incorrect match:

Which of the following event can be related to the repolarisation of nerve fiber?

1. Opening up of K⁺ gated channel

2. Opening up of Cl^- gated channel

3. Closure of Na⁺ gated channel

4. Both 1 & 3