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
B.
I, II and IV
Conditioned or acquired reflexes are those reflex actions that are not present at birth but develop later in life through learning or experience. However, these are liable to change, disappear (due to lack of practice) or reappear. Cerebral cortex (grey matter) takes part in conditional reflexes.
Movement of tongue muscle is controlled by
facial nerve
trigeminal nerve
hypoglossal nerve
vagus nerve
Third and fourth ventricles of the brain are connected by
aqueduct of Sylvious
foramen of Monro
foramen of Magnum
corpus callosum
Which centre is stimulated during increase in body temperature?
Anterior hypothalamus
Posterior hypothalamus
Limbic system
Red nucleus
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
Vegus nerve is a
mixed X cranial nerve
mixed XI cranial nerve
mixed X thoracic nerve
sensory X cranial nerve
Which of the following substances can cure Parkinson's disease?
GABA
Acetylcholine
Dopamine
Glutamic acid
