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

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

Codes :

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

Limbic system is concerned with

1. Components of cerebrum and diencephalon

2. Regulation of sexual behaviour

3. Emotional behaviour

4. All of these

The somatic neural system of the peripheral nervous system

1. Relays impulses from CNS to smooth muscles of body

2. Relays impulses from organs to the CNS

3. Regulates the movement of substances in hollow visceral organs of body

4. Relays impulses from CNS to skeletal muscles

Which of the following neural system relays the impulse from CNS to skeletal muscles?

1. Somatic neural system

2. Sympathetic neural system

3. Parasympathetic neural system

4. Autonomic neural system

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?

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

The neural system provides an organized network of ___A___ connections for a ___B___ coordination. Choose the correct option for A, B to complete the given statement.

1. A – point to point, B – slow

2. A – chemical, B – fast

3. A – point to point, B – fast

4. A – Chemical, B – slow

_________integrates information received from semicircular canals of ear and _______ regulates emotional reactions with limbic system.

1. Cerebral cortex, Midbrain

2. Cerebellum, Midbrain

3. Cerebral cortex, Hypothalamus

4. Cerebellum, Hypothalamus

___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