Tag: divisions of nervous system
Questions Related to divisions of nervous system
Additional parasympathetic ganglia occur in
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Head and neck
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Lateral chains
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Spinal cord
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All the above
An interneuron consists of the following
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Long dendrites and short axon
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Short dendrites and long and short axon
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Short dendrites and a long axon
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Long dendrites and a long axon
Which of the following pairs correctly identifies function of parasympathetic nervous system?
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Slows heart beat, promotes pancreatic secretion
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Increases secretion of sweat gland and intestinal gland
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Accelerates heart beat, dilates arteries
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Raises blood pressure, increases peristaltic activity.
Which of the following is not an effect produced by parasympathetic stimulation?
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Pupil dilation
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Increased saliva
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Increased stomach activity
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Constriction of bronchi
Dilation of the pupil is the function of the sympathetic nervous system. Parasympathetic stimulation causes: slowing down of the heartbeat; lowering of blood pressure; constriction of the pupils; decreased heart rate; salivation increase; peristalsis of the GI tract.
Which one feature is correctly described?
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Salivary glands - secretes saliva - replication
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Pupil of the eyes - dilate - constricts- regulates entry of light
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Heart rate - decreases - tachycardia
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Intestinal peristalsis - stimulates - inhibits - heart rate
The pupil is a hole or opening in the middle of the iris. Iris is the coloured part of the eye that controls the amount of light entering the eye by adjusting the size of the pupil (contraction and dilation). Salivary glands are associated with digestion while intestinal peristalsis moves the food through the intestine. Tachycardia refers to the presence of faster heart beat. So, the correct answer is option B.
What are the sympathetic and parasympathetic nervous systems the part of?
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Brain
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Spinal cord
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Central nervous system
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Autonomous nervous system
The sympathetic nervous system (SNS) is part of the autonomic nervous system (ANS), which also includes the parasympathetic nervous system (PNS).
Parasympathetic nervous system on stimulation bring about the functions, like
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Dilation of blood vessels
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Contraction of pupil and muscles of urinary bladder
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Contraction of walls of digestive tract
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All of the above
Parasympathetic stimulation causes: slowing down of the heartbeat; lowering of blood pressure; constriction of the pupils; increased blood flow to the skin and viscera; salivation increase; peristalsis of the GI tract.
The main functions of sympathetic nervous system are
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The contraction of skin blood vessels and sudden increase of blood pressure
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Contraction of muscles, secretion of sweat glands and rapid coagulation of blood
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Dilation of bronchi, contraction of heart and sudden decrease in the number of RBC in the blood
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All of the above
During the initial activation of the sympathetic system, norepinephrine gets released first as a preparatory hormone. This gets the body ready for the first stages of the emergency event.
Parasympathetic nervous system has its origin from
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The brain
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The spinal cord
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Both of the above
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None of the above
Parasympathetic nerve fibres arise from the central nervous system with the $S _2$, $S _3$, and $S _4$ spinal nerves and from the third, seventh, ninth, and tenth cranial nerves.
Corpus callosum connects two ________________.
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Cerebral hemispheres
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Ventricles of brain
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Cerebellar hemispheres
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Optic thalamus
Corpus callosum is a broad band of nervous tissue that connects two cerebral hemispheres. It consists of $300$ million fibres and is present only in mammals.