141.

A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-D

• A - Receptor; C - Synaptic vesicles

• B - Synaptic connection;  D - K⁺

• A - Neurotransmitter; B - Synaptic cleft

• C - Neurotransmitter; D - Ca²⁺

Parts A, B, C and D of the human eyes are shown in the diagram. Select the option, which gives correct identification along with its functions/characteristics

• A - retina - contains photoreceptors - rods and cones

• B - blind spot - has only a few rods and cones

• C - aqueous chamber - reflects the light, which does not pass through the lens

• D - choroidits anterior part forms ciliary body

Which excitatory neurotransmitter is involved in the transmission of impulse at the neuromuscular junction?

• Epinephrine

• Serotonin

• Acetylcholine

• Glycine

Which area of cerebral cortex is responsible for the interpretation of speech?

• Broca's area

• Wernicke's area

• Premotor area

• Association area of sensory cortex

Proximal convoluted tubule of nephron is responsible for

• filtration of blood

• maintenance of glomerular filtration rate

• selective reabsorption of glucose, amino acid, NaCl and water

• reabsorption of salts only

Which of the following statements are true for 'Motor cortex'?

I. It is located in the frontal lobe of cerebral cortex.

II It contains pyramidal cells.

III. It is responsible for all visual functions.

IV. It is essential for our thought processes.

V. It stimulates wakefulness.

VI. It regulates voluntary muscular movements.

• I, II, III and V

• II, III, IV and V

• II, IV, V and VI

• I, II, IV and VI

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

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