AUTONOMIC NERVOUS SYSTEM
1. Acetylcholine:
a) Is synthesized by the enzyme acetylcholine esterase
b) Action in synapses is terminated by re-uptake of pre-
synaptic neurons
c) Is released by some postganglionic sympathetic neurons
d) Is destroyed by monoamine oxidase
e) Reduces the heart rate by acting on nicotinic receptors in the SA node
2. Generalized sympathetic stimulation causes all the following except:
a) Increases the heart rate
b) Increases sweating
c) Relaxes bronchial smooth muscles
d) Tightens GIT sphincters
e) Constriction of pupil
3. The following actions of noradrenaline are mediated by stimulation of alpha-
adrenergic receptors:
a) Constriction of cutaneous blood vessels
b) Increase of myocardial contractility
c) Dilation of arterioles to the viscera
d) Relaxation of urinary bladder
e) Dilation of systemic veins
4. Noreadrenaline is released by sympathetic nervous system at all the following
except:
a) Cutaneous blood vessels
b) SA Node
c) Sweat glands
d) Cardiac muscles
e) Renal nerves
5. Nicotinic Receptors are blocked by:
a) Atropine
b) Curare
c) Suxmethonium
d) Propranlol
e) Acetylcholine esterase
6. Acetylcholine:
a) Is blocked by propanolol
b) Is blocked by curare in the autonomic ganglion
c) Is the neurotransmitter at all sites that are blocked by atropine
d) Is secreted by postganglionic sympathetic to the heart
e) Is degraded by the enzyme choline transferase
, 7. The sympathetic system:
a) Has short postganglionic neurons
b) Fibers are carried in the vagus nerve
c) Produces nicotine at its nerve endings
d) Has a thoraco-lumbar outflow from the spinal cord
e) Action is antagonized by atropine
8. The parasympathetic system:
a) Has short preganglionic fibers
b) Secretes dopamine
c) Controls most of the movements and secretions of the gut
d) Brings increase in heart rate during exercise
e) Action is blocked by Beta receptor blocker
9. The nicotinic cholinergic receptors are:
a) Not inhibited by high concentrations of nicotine
b) Inhibited by high concentrations of acetylcholine
c) Blocked by atropine
d) Ligand-gated chloride channels
e) Located in the cell nucleus
10. Cell bodies of preganglionic neurons of the sympathetic nervous system are
found in:
a) The dorsal root ganglion
b) The sympathetic chain
c) Collateral ganglia
d) The dorsal horn cells of the spinal cord
e) The lateral horn cells of the spinal cord
11. Collateral ganglia of the sympathetic nervous system include the:
a) Adrenal medullary cells
b) Coeliac ganglion
c) Paravertebral ganglia
d) The basal ganglia
e) Nucleus of the tractus solitaries
12. The effects of parasympathetic stimulation include:
a) Ejaculation
b) Secretion of sweat
c) Contraction of the rectum
d) Constriction of gastrointestinal sphincters
e) Dilation of the bronchioles
13. Adrenal medullary cells are stimulated by:
a) Dopamine
b) GABA
c) Adrenaline
d) Acetylcholine
e) Nor-adrenaline
1. Acetylcholine:
a) Is synthesized by the enzyme acetylcholine esterase
b) Action in synapses is terminated by re-uptake of pre-
synaptic neurons
c) Is released by some postganglionic sympathetic neurons
d) Is destroyed by monoamine oxidase
e) Reduces the heart rate by acting on nicotinic receptors in the SA node
2. Generalized sympathetic stimulation causes all the following except:
a) Increases the heart rate
b) Increases sweating
c) Relaxes bronchial smooth muscles
d) Tightens GIT sphincters
e) Constriction of pupil
3. The following actions of noradrenaline are mediated by stimulation of alpha-
adrenergic receptors:
a) Constriction of cutaneous blood vessels
b) Increase of myocardial contractility
c) Dilation of arterioles to the viscera
d) Relaxation of urinary bladder
e) Dilation of systemic veins
4. Noreadrenaline is released by sympathetic nervous system at all the following
except:
a) Cutaneous blood vessels
b) SA Node
c) Sweat glands
d) Cardiac muscles
e) Renal nerves
5. Nicotinic Receptors are blocked by:
a) Atropine
b) Curare
c) Suxmethonium
d) Propranlol
e) Acetylcholine esterase
6. Acetylcholine:
a) Is blocked by propanolol
b) Is blocked by curare in the autonomic ganglion
c) Is the neurotransmitter at all sites that are blocked by atropine
d) Is secreted by postganglionic sympathetic to the heart
e) Is degraded by the enzyme choline transferase
, 7. The sympathetic system:
a) Has short postganglionic neurons
b) Fibers are carried in the vagus nerve
c) Produces nicotine at its nerve endings
d) Has a thoraco-lumbar outflow from the spinal cord
e) Action is antagonized by atropine
8. The parasympathetic system:
a) Has short preganglionic fibers
b) Secretes dopamine
c) Controls most of the movements and secretions of the gut
d) Brings increase in heart rate during exercise
e) Action is blocked by Beta receptor blocker
9. The nicotinic cholinergic receptors are:
a) Not inhibited by high concentrations of nicotine
b) Inhibited by high concentrations of acetylcholine
c) Blocked by atropine
d) Ligand-gated chloride channels
e) Located in the cell nucleus
10. Cell bodies of preganglionic neurons of the sympathetic nervous system are
found in:
a) The dorsal root ganglion
b) The sympathetic chain
c) Collateral ganglia
d) The dorsal horn cells of the spinal cord
e) The lateral horn cells of the spinal cord
11. Collateral ganglia of the sympathetic nervous system include the:
a) Adrenal medullary cells
b) Coeliac ganglion
c) Paravertebral ganglia
d) The basal ganglia
e) Nucleus of the tractus solitaries
12. The effects of parasympathetic stimulation include:
a) Ejaculation
b) Secretion of sweat
c) Contraction of the rectum
d) Constriction of gastrointestinal sphincters
e) Dilation of the bronchioles
13. Adrenal medullary cells are stimulated by:
a) Dopamine
b) GABA
c) Adrenaline
d) Acetylcholine
e) Nor-adrenaline
