Supply the information that is necessary to complete the following statements. 1. The dural sac of...

 

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Supply the information that is necessary to complete the following statements. 1. The dural sac of the spinal cord is continuous with the mater that surrounds the brain. 2. The caudal end of the spinal cord is called the 3. The caudal end of the of the spinal cord terminates at the lower border lumbar vertebra. 4. The cluster of nerves that extend downward from the end of the spinal cord is called the 5. The coccygeal nerve emerges from the plexus. 6. The femoral nerve is formed by the union of the following three lumbar nerves: and 7. The largest nerve emerging from the sacral plexus is the nerve. 8. The iliohypogastric and ilioinguinal nerves are branches of the first nerve. 9. The innermost meninx surrounding the spinal cord is the mater. 10. The meninx that lies just within the dura mater is the 11. The spinal ganglion is an enlargement of the root. 12. The central canal of the spinal cord is lined with ependymal cells. 13. The cavity within the spinal cord that is continuous with the ventricles of the brain is called the canal. 14. The inner portion of the spinal cord, forming the pattern of a butterfly, consists of matter. 15. The space between the dura mater and vertebral bone is called the 16. cated close to the organ that is innervated. 17. A somatic reflex are with one or more interneurons is said to be space. (vertebral or collateral) ganglia are usually lo- 18. Cell bodies of afferent neurons of visceral reflexes are located in ganglia. 19. If a somatic reflex lacks an interneuron it is said to be 20. List the two divisions of the autonomic nervous system. 1. 2. 3. 2 3 4 5 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Fig. 31.1 C. True-False Indicate the validity of the following statements with a T or F. 1. The spinal cord during the fetal life fills the entire length of the spinal cavity. 2. The lumbar plexus is forced by the union of L₁, L₂, L3, and most of L₁ nerves. 3. The brachial plexus is formed by the union of the lower four cer- vical nerves and the first thoracic nerve. 4. The cervical plexus is formed by the union of the first three pairs of cervical nerves. 5. The filum terminale externa is a downward extension of the filum terminale internus. 6. The innermost fiber of the cauda equina (on the median line) is the filum terminale internus. 7. Cerebrospinal fluid fills the subarachnoid space. 8. The white matter of the spinal cord consists of myelinated fibers of nerve cells. 9. The posterior cutaneous nerve emerges from the lumbar plexus. 10. The sacral plexus is formed by the union of the femoral and sci- atic nerves. 11. The effector in a somatic reflex is always skeletal muscle. 12. Most organs of the body are innervated by fibers of the sympa- thetic and parasympathetic divisions of the autonomic nervous system. 13. Collateral ganglia of the autonomic nervous system are united to form a chain along the vertebral column. 14. All visceral reflex arcs have two afferent neurons. 15. The central canal of the spinal cord is continuous with the ventri- cles of the brain. 16. The dura mater of the spinal cord extends peripherally to form a covering for spinal nerves. 17. The central canal of the spinal cord is lined with ciliated epithelium. 18. All somatic reflex arcs have at least one interneuron. 19. All visceral reflex arcs have two efferent neurons. 20. Spinal ganglia are located in the anterior roots of spinal nerves. D. Numbers Indicate the number of pairs of the following that are normally present. 1. Cervical nerves 2. Thoracic nerves 3. Lumbar nerves 4. Sacral nerves 5. Coccygeal nerves True-False 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 1. Numbers 2. 3. Ansv 4. 5. Supply the information that is necessary to complete the following statements. 1. The dural sac of the spinal cord is continuous with the mater that surrounds the brain. 2. The caudal end of the spinal cord is called the 3. The caudal end of the of the spinal cord terminates at the lower border lumbar vertebra. 4. The cluster of nerves that extend downward from the end of the spinal cord is called the 5. The coccygeal nerve emerges from the plexus. 6. The femoral nerve is formed by the union of the following three lumbar nerves: and 7. The largest nerve emerging from the sacral plexus is the nerve. 8. The iliohypogastric and ilioinguinal nerves are branches of the first nerve. 9. The innermost meninx surrounding the spinal cord is the mater. 10. The meninx that lies just within the dura mater is the 11. The spinal ganglion is an enlargement of the root. 12. The central canal of the spinal cord is lined with ependymal cells. 13. The cavity within the spinal cord that is continuous with the ventricles of the brain is called the canal. 14. The inner portion of the spinal cord, forming the pattern of a butterfly, consists of matter. 15. The space between the dura mater and vertebral bone is called the 16. cated close to the organ that is innervated. 17. A somatic reflex are with one or more interneurons is said to be space. (vertebral or collateral) ganglia are usually lo- 18. Cell bodies of afferent neurons of visceral reflexes are located in ganglia. 19. If a somatic reflex lacks an interneuron it is said to be 20. List the two divisions of the autonomic nervous system. 1. 2. 3. 2 3 4 5 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Fig. 31.1 C. True-False Indicate the validity of the following statements with a T or F. 1. The spinal cord during the fetal life fills the entire length of the spinal cavity. 2. The lumbar plexus is forced by the union of L₁, L₂, L3, and most of L₁ nerves. 3. The brachial plexus is formed by the union of the lower four cer- vical nerves and the first thoracic nerve. 4. The cervical plexus is formed by the union of the first three pairs of cervical nerves. 5. The filum terminale externa is a downward extension of the filum terminale internus. 6. The innermost fiber of the cauda equina (on the median line) is the filum terminale internus. 7. Cerebrospinal fluid fills the subarachnoid space. 8. The white matter of the spinal cord consists of myelinated fibers of nerve cells. 9. The posterior cutaneous nerve emerges from the lumbar plexus. 10. The sacral plexus is formed by the union of the femoral and sci- atic nerves. 11. The effector in a somatic reflex is always skeletal muscle. 12. Most organs of the body are innervated by fibers of the sympa- thetic and parasympathetic divisions of the autonomic nervous system. 13. Collateral ganglia of the autonomic nervous system are united to form a chain along the vertebral column. 14. All visceral reflex arcs have two afferent neurons. 15. The central canal of the spinal cord is continuous with the ventri- cles of the brain. 16. The dura mater of the spinal cord extends peripherally to form a covering for spinal nerves. 17. The central canal of the spinal cord is lined with ciliated epithelium. 18. All somatic reflex arcs have at least one interneuron. 19. All visceral reflex arcs have two efferent neurons. 20. Spinal ganglia are located in the anterior roots of spinal nerves. D. Numbers Indicate the number of pairs of the following that are normally present. 1. Cervical nerves 2. Thoracic nerves 3. Lumbar nerves 4. Sacral nerves 5. Coccygeal nerves True-False 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 1. Numbers 2. 3. Ansv 4. 5.

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