Multiple Choice QuestionsWhich one of the following acts solely as an inhibitory neurotransmitter?
Norepinephrine
Gamma () amino butyric acid
Acetylcholine
Dopamine
B.
Gamma () amino butyric acid
-aminobutyric acid is the chief inhibitory neurotransmitter in the mammalian central nervous system. It helps in reducing neuronal excitability throughout the nervous system. In humans it is also directly responsible for the regulation of muscle tone.
Nor-epinephrine, also called nor-adrenaline is a neurotransmitter released by adrenergic nerve terminals in the oentral nervous system.
Acetylcholine is the neurotransmitter produced by neurons referred to as cholinergic neurons.
Dopamine is a neurotransmitter that plays a number of important roles in the human brain and body.
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
Switch
