Related Questions

Stimulation of the sympathetic part of the autonomic nervous system is responsible for
A Constriction of the pylorus
B Secretion of the sweat glands
C Contraction of the smooth muscles of the male genital tract
D Emptying of the urinary bladder
E Contraction of the bronchial smooth muscles
The following anaesthetic agents cause direct sympathetic stimulation
A Ketamine
B Seroflurane
C Desflurane
D Halothane
E Isoflurane
Duration of inspiration is decreased and rate of ventilation is increased due to stimulation of
A Pneumotaxic center
B Apneustic center
C Vagus nerve
D Nucleus of tractus solitarius
E Ventral respiratory group
The postsynaptic neuron becomes fatigued after repeatative stimulation of an excitatory synapse at a rapid rate. This is due to
A Exhaustion of neurotransmitter store in presynaptic terminal
B Progressive inactivation of many postsynaptic receptors
C Slow development of abnormal concentration of ions in postsynaptic neurons
D Decrement of number of calcium channels of presynaptic terminal
E Increment of cholinesterase in synaptic cleft
The thoracic sympathetic trunk
A Lies infront of the neck of the ribs
B Provides all the splanchnic nerves
C Possesses eleven ganglia
D Has no direct communication with the lumbar sympathetic trunk
E Is independent of the thoracic spinal nerves
Sympathetic and parasympathetic nervous systems act as physiological antagonists in following organs
A Urinary bladder
B Airways
C Cilliary muscles
D Heart
E Blood vessels
Damage to the sympathetic nerves from the thoracolumbar outflow T11 to L2 will disturb the function-
A Detrusor muscle
B Bladder neck
C Trigone
D Seminal vesicles
E External sphincter
Cutting the sympathetic nerves to the urinary bladder may cause
A Loss of tone in intemal sphincter
B Loss of pain sensation in bladder
C Over active bladder
D Difficulty in-emptying the bladder
E Increase in bladder capacity
The net effects of stimulation of baroreceptors are
A Venodilation of peripheral circulatory system
B To decrease heart rate
C To decrease arterial blood pressure
D Venodilation of pulmonary vessels
E To increase force of contraction of cardiac muscle
Vagal stimulation causes
A Fall in blood pressure
B Decreased cardiac output
C Constriction of pupil
D Relaxation of bronchial smooth muscles
E Decreased intestinal secretion

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