Which one of the following acts solely as an inhibitory neurotransmitter?

• Norepinephrine

• Gamma ($\mathrm{\gamma }$) amino butyric acid

• Acetylcholine

• Dopamine

The bundle of axons in the central nervius system is known as

• nerve

• ganglion

• tract

• neuron

303.

Which one of the followings is the functional unit of hearing?

• Utricle

• Organ of Zuckerkandl

• Organ of Corti

• Vestibular apparatus

Which one of the followings is not a refractive medium of the eye?

• Lens

• Vitreous humour

• Aqueous humour

• Pupil

Which of the following pairs of cranial nerves is/are of mixed category?

• Glossopharyngeal and hypogrossal

• Trigeminal and abducens

• Trigeminal and facial

• Glossopharyngeal and vagus

Myelin sheaths

• are abundant in nervous system of non- vertebrates

• consists largely of lipids

• has a low electric resistance

• allows the continous conduction of impulse

Pacinian corpuscles found in the skin are sensitive to

• touch

• pressure

• temperature (hot and cold)

• vibrations

Which of the following statement is true for maculae found in the internal ear of humans?

• It is present in ampullae of semicircular ducts

• These are three in number

• Each macula contains calcarious ear stones called oto lith.

• All of above

Myelin sheaths

• are abundant in the nervous system of non-vertebrates

• consists largely of lipids

• has a low electric resistance

• allow the continous conduction of impulse

Which of the following characteristic is not seen in a person suffering from schizoprenia?

• Auditory hallucinations

• Split personality

• False beliefs

• Lack of motivation