Multiple Choice QuestionsThird and fourth ventricles of the brain are connected by
aqueduct of Sylvious
foramen of Monro
foramen of Magnum
corpus callosum
During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.
P - Acetylcholine; Q - Ca2+
P - Acetylcholine; Q - Na+
P - GABA; Q - Na+
P - Cholinesterase; Q - Ca2+
Identify the origin of sympathetic nerve fibres and the location of their ganglia.
They arise from thoracolumbar region of spinal cord and form ganglia just beside the vertebral column
They arise from thoracocervical region of spinal cord and form ganglia just beside the vertebral column
They arise from cranio-sacral region of spinal cord and from ganglia very close to effector organ
They arise from thoracolumbar region of spinal cord and form ganglia very close to effector organ
Among the following characteristics, indicate the correct combination applicable to conditional reflex.
I. Acquired by practice or learning
II. Non acquired by birth.
III. Does not abolish by lack of practice
IV. Participation of cerebral cortex
V. Originates spontaneously
I, II and III
I, II and IV
I and IV
II, III and V
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
B.
Wernicke's area
Wernicke's area or Wernicke's speech area is one of the two parts of the cerebral cortex linked to the interpretation and understanding of speech, while Broco's area (another area of cerebral cortex) is associated with the production of speech. It basically control the flow of words from brain to the mouth.
Broca's area or the Broca area is a region in the frontal lobe of the dominant hemisphere. It is linked to speech production.
The premotor cortex is an area of motor cortex lying within the frontal lobe of the brain just anterior to the primary motor cortex.
Association cortex is the cerebral cortex outside the primary areas. It is essential for mental functions that are more complex than detecting basic dimensions of sensory stimulation, for which primarysensory areas appear to be necessary.
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
Switch
