THE GOOFY ANATOMIST QUIZZES
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1 THE GOOFY ANATOMIST QUIZZES 5. NERVES Q1. Which of the following classifications of the nervous systems is correct? A. The autonomic nervous system is composed of the brain, cranial nerves and spinal nerves. B. The peripheral nervous system includes all cranial and spinal nerves. C. The somatic nervous system is purely sensory. D. The somatic nervous system is purely motor. Q2. The spinal cord A. Receives sensory information via the dorsal root. B. Receives motor information via the dorsal root. C. Is composed of white matter only. D. Is composed of grey matter only. Q3. What is the root value of the phrenic nerve? A. Cranial nerve 10. B. T1 T12. C. T1 T11. D. C3, C4 and C5. Q4. A spinal nerve contains A. Purely sensory fibres. B. Purely motor fibres. C. Sensor, motor and autonomic fibres. D. Autonomic fibres only.
2 Q5. The 8 th intercostal nerve A. Supplies the muscles of the 7 th intercostal space only. B. Supplies the muscles of the 7 th intercostal space and some abdominal muscles. C. Supplies the muscles of the 8 th intercostal space only. D. Supplies the muscles of the 8 th intercostal space and some abdominal muscles. Q6. What is the sympathetic division of the autonomic nervous system responsible for? D. The dilation of peripheral blood vessels. Q7. What is the parasympathetic division of the autonomic nervous system responsible for? D. The constriction of peripheral blood vessels. Q8. At what spinal levels do sympathetic fibres leave the spinal cord? A. C1 Co1. B. C1 C7. C. T1 L2/L3. D. L1 S2/S3. Q9. Where do parasympathetic fibres leave the central nervous system? A. Via all of the cranial nerves. B. Via cranial nerves 3, 7, 9 and 10, as well as sacral spinal nerves S2 S4. C. Via cranial nerves 1, 2, 3, 4 and 5 and all thoracic spinal nerves. D. None of the above.
3 Q10. Which of the following thoracic sympathetic ganglia nerves will give rise to postganglionic fibres that will innervate the heart and oesophagus? A. Stellate, T2, T3, and T4. B. T5, T6, T7, T8, T9. C. T10. T11. D. T12. Q11. Fill in the blanks: sympathetic nerve fibres enter the sympathetic trunk by the And some fibres leave by the. A. White rami communicantes, grey rami communicantes. B. Grey rami communicantes, white rami communicantes. C. White rami communicantes, white and grey rami communicantes. D. Grey rami communicantes, white and grey rami communicantes. Q12. The left vagus nerve A. Runs posterior to the hilum of the left lung. B. Runs anterior to the hilum of the left lung. C. Will stimulate the SA node to increase the heart rate. D. Gives off the left recurrent laryngeal at the level of the left subclavian artery. Q13. The right vagus nerve A. Gives off the right recurrent laryngeal nerve at the level of the right subclavian artery. B. Originates at the SA node of the heart. C. Runs inferiorly on the anterior aspect of the heart. D. Will stimulate the SA node to increase the heart rate. Q14. The cardiac plexus A. Is only superficial. B. Is only deep. C. Lies on the posterior aspect of the carina of the trachea. D. Has both sympathetic and parasympathetic components.
4 Answers Q1. Which of the following classifications of the nervous systems is correct? A. The autonomic nervous system is composed of the brain, cranial nerves and spinal nerves. B. The peripheral nervous system includes all cranial and spinal nerves. C. The somatic nervous system is purely sensory. D. The somatic nervous system is purely motor. Can t be A, because the ANS is made up of general and special motor and sensory nerves (mainly in the sympathetic and parasympathetic divisions). Can t be C or D, because the SNS is sensory and motor (think about the sensory receptors on the skin and the motor nerves innervating the skeletal muscles of the legs). Q2. The spinal cord A. Receives sensory information via the dorsal root. B. Receives motor information via the dorsal root. C. Is composed of white matter only. D. Is composed of grey matter only. Spinal cord receives sensory information via the dorsal root and sends out motor information via the ventral root. The spinal cord contains both grey and white matter (grey matter lies in the centre of the spinal cord, white matter lies in the periphery of the spinal cord. Q3. What is the root value of the phrenic nerve? A. Cranial nerve 10. B. T1 T12. C. T1 T11. D. C3, C4 and C5. C3, 4 5 keeps the diaphragm alive. Q4. A spinal nerve contains A. Purely sensory fibres. B. Purely motor fibres. C. Sensor, motor and autonomic fibres. D. Autonomic fibres only.
5 Some autonomic fibres will be mixed into the spinal nerves, which mainly consist of somatic sensory and motor fibres. Q5. The 8 th intercostal nerve A. Supplies the muscles of the 7 th intercostal space only. B. Supplies the muscles of the 7 th intercostal space and some abdominal muscles. C. Supplies the muscles of the 8 th intercostal space only. D. Supplies the muscles of the 8 th intercostal space and some abdominal muscles. No trick question here the 8 th intercostal nerve supplies the muscles of the 8 th intercostal space, and some of the abdominal muscles (e.g. rectus abdominis) too. Remember that the 7 th 11 th intercostal nerves also supply some of the abdominal muscles. Q6. What is the sympathetic division of the autonomic nervous system responsible for? D. The dilation of peripheral blood vessels. Q7. What is the parasympathetic division of the autonomic nervous system responsible for? D. The constriction of peripheral blood vessels. Q8. At what spinal levels do sympathetic fibres leave the spinal cord? A. C1 Co1. B. C1 C7. C. T1 L2/L3. D. L1 S2/S3. Sympathetic division of the ANS, also called thoracolumbar outflow.
6 Q9. Where do parasympathetic fibres leave the central nervous system? A. Via all of the cranial nerves. B. Via cranial nerves 3, 7, 9 and 10, as well as sacral spinal nerves S2 S4. C. Via cranial nerves 1, 2, 3, 4 and 5 and all thoracic spinal nerves. D. None of the above. Parasympathetic division of the ANS, also called craniosacral outflow. Q10. Which of the following thoracic sympathetic ganglia nerves will give rise to postganglionic fibres that will innervate the heart and oesophagus? A. Stellate, T2, T3, and T4. B. T5, T6, T7, T8, T9. C. T10. T11. D. T12. Remember that T5 T9 form the greater thoracic splanchnic nerve, T10 11 form the lesser thoracic splanchnic nerve, T12 forms the least thoracic splanchnic nerve. If you research this online, you will find considerable variation in the composition of each of these thoracic splanchnic nerves. Q11. Fill in the blanks: sympathetic nerve fibres enter the sympathetic trunk by the And some fibres leave by the. A. White rami communicantes, grey rami communicantes. B. Grey rami communicantes, white rami communicantes. C. White rami communicantes, white and grey rami communicantes. D. Grey rami communicantes, white and grey rami communicantes. Sympathetic nerve fibres enter the sympathetic trunk by the white rami communicantes, and leave by the grey rami communicantes. Q12. The left vagus nerve A. Runs posterior to the hilum of the left lung. B. Runs anterior to the hilum of the left lung. C. Will stimulate the SA node to increase the heart rate. D. Gives off the left recurrent laryngeal at the level of the left subclavian artery.
7 Can t be B, because the vagus nerve runs posterior to the lung hilum (remember: phrenic in front, vagus behind). Can t be C, because the vagus is a parasympathetic nerve which slows the heart rate. Can t be D, because the left vagus gives off the left recurrent laryngeal nerve at the level of the aortic arch. The right recurrent laryngeal branches off at the level of the right subclavian artery. Q13. The right vagus nerve A. Gives off the right recurrent laryngeal nerve at the level of the right subclavian artery. B. Originates at the SA node of the heart. C. Runs inferiorly on the anterior aspect of the heart. D. Will stimulate the SA node to increase the heart rate. Can t be B, because the vagus nerve originates in the brainstem. Can t be C, because the right vagus nerve runs in an inferior direction on the posterior aspect (or base) of the heart. Can t be D, because the vagus nerve is parasympathetic and would slow the heart rate. Q14. The cardiac plexus A. Is only superficial. B. Is only deep. C. Lies on the posterior aspect of the carina of the trachea. D. Has both sympathetic and parasympathetic components. The cardiac plexus has superficial and deep parts and these contain cardiac branches (from the parasympathetic vagus nerve) and sympathetic nerves from the sympathetic trunk (stellate and T2 T4 ganglia).
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