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

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

The limbic system is formed by

1.  The hypothalamus, epithalamus, amygdala and hippocampus

2.  Hypothalamus, amygdala and hippocampus

3.  Corpora quadrigemina and hippocampus

4.  Midbrain an hindbrain 

Highly vascular and closely investing protective coat around the brain is known as

1.  Arachnoid 

2.  Pia mater

3.  Dura mater

4.  Sub-arachnoid space

A major coordinating center for sensory and motor signaling in the human brain is shown in the given sagittal section by the letter:
     
1. A
2. B
3. C
4. D