Autonomic Nervous System - Questions and Answers

A.N.S. DIRECTIONS (Questions 1 through 121): Each of the numbered items or incomplete statements in this section is followed by answers or by completions of the statement. Select the ONE lettered answer of ceanpletion that is BEST in each case. 1 - Which of the following is the correct sequence injury ical refiex are: a) Receptor, afferent neuroe, efferent neuron, integration center, effector. b) Effector, efferent neuron, integration center, afferent neuron, receptor. Receptor, afferent neuron, integration center, efferent neuror, effector d) Receptor, efferent neuron, integration center, afferent neuron, effector 2. The following reflexes are all autonomie EXCEPT: a) Salivary secretion b) Micturition Flexion of the arm foilowing a painful stimulusematek N d) Defecation. 3- Preganglionic autonomic fibres are of: a) Type A (alpha). b) Type A (delta). Type B) d) Type C. +The autonomic ganglia: a) Are 3 types b) Are the site of relay of atferent neurons Function as distributing centers. d) Are located inside the CNS. 5- Concerning the autonomic ganglia, all the following is true EXCEPT: a) They acting as distributing centers. b) They are 3 types . Their receptors are specifically blocked by atropine c) Their chemical transmitter is acetylcholine 6- The autonomie ganglia have all the foliowing characters EXCEPT: a) Are three types: lateral, collateral and terminal. b) Are sites of relay of autonomic preg and postgang fors Are all present adjacent to the spinal cord. d) Are functioning as distributing centres 7- The symp. preganglionic nerve fibres: a) Leave the spinal cord in the grey runi communicantes. b) Originate at the autonomie ganglia. L Are myelinated nerve fibres belonging to the B group of nerve fibres d) Show minimal divergence in the autonomic ganglia. 8. Which statement correctly describes the relationship between preganglionic and postganglionic sympathetic axons a) The number of presynaptic axons is much greater than the number of b) postsynaptic axons. The number of postsynaptic axons is much greater than the number of presynaptic axons. The number of presynaptic and portsynaptic axons is equal: 9. The sympathetic division of the ANS is characterized by: Localized actions affecting few systemus. Thomcolumbar outflow from the spinal cord Short postganglionic fibres. d) Adrenergic preganglionic fibres 10- All the following structures are supplied by sympathetic system only EXCEPT: a) Ventricles of the heart Constrictor pupillac muscle Adrenal medulla d) Skin. 11- Which of the following organs reecive both sympathetie & parasympathetic: a) Adrenal medulla. b) Swent glands. c) Pilomotor muscles. Lungs, 11- The preganglionie sympathetic that innervate the eye originate from: Superior colliculi Thoracic segments of spinal cord. c) Superior cervical gaglione d) Ciliary ganglion. 13- A lesion in the cervical symp, chain (Horner's syndrome) causes: a) Increased sweating. Dropping of the upper eyelid (ptosis). c) Vasoconstriction of the skin blood vessels (leading to palline), )Mydrinsis (dilatation-of-the-pupil) A.N.S. 69. About Prostigmine (Neostigmine), all are true EXCEPT a Acts specifically at motor end plate. is used in reatment of myasthenia gravis, c) Inhibits cholinesterase enzyme. d) Is an irreversible anticholinester. E ப 70- The antidote of eserine ist Amphetamine b) Noradrenaline c) Ergotoxine Atropine Mesme Hard 71- Atropine injection causes, all the following LACTPT a) Pupillodilatation.. b) Increased heart rate. Relaxation of skeletal muscles. d) Diminished salivary secretion 72. Atropine injection causes, all the following ENCEFT: a) An increase in the heart rate, b) Pupilic-diimation Difficult micturition. Constriction of the bronchi. 73- Atropine blocks the action of A.Ca. at the following sites EXCERT: 4) Heart Adrenal medulla. c) Sweat glands. d) Constrictor pupillac muscle. appleid bin past Day 74- Atropine blocks the action of A.Ch. on receptors located in the following areas, EXCEPT: a) The gastric glands secreting HCL b) Sinoetrial pode Motor end plate. d) Iris 75- Atropine causes dry mouth by inhibiting which of the following receptots? receptor. b) B receptor. Muscarinic receptor d) Nicotinic ceceptor