Question

complete the following statements:

1. the spinal cord gives rise to 31 pairs of
2. the bulge in the spinal cord that gives off nerves to the upper limbs is called the
3. the bulge in the spinal cord that gives off nerves to the lower limbs is called the
4. the is a groove that extends the length of the spinal cord posteriorly.
5. in a spinal cord cross section, the posterior of the gray matter resemble the upper wings of a butterfly.
6. the cell bodies of motor neurons are found in the horns of the spinal cord.
7. the connects the gray matter on the left and right sides of the spinal cord.
8. the in the gray commissure of the spinal cord contains cerebrospinal fluid and is continuous with the ventricles of the brain.
9. the white matter of the spinal cord is divided into anterior, lateral, and posterior
10. the longitudinal bundles of nerve fibers within the spinal cord constitute major nerve pathways called

Explanation:

1. The spinal cord gives rise to 31 pairs of spinal nerves. Spinal nerves are peripheral nerves that emerge from the spinal cord.
2. The bulge in the spinal cord that gives off nerves to the upper limbs is called the cervical enlargement. It provides innervation to the arms.
3. The bulge in the spinal cord that gives off nerves to the lower limbs is called the lumbar enlargement. It is responsible for innervating the legs.
4. The posterior median sulcus is a groove that extends the length of the spinal cord posteriorly.
5. In a spinal cord cross - section, the posterior horns of the gray matter resemble the upper wings of a butterfly.
6. The cell bodies of motor neurons are found in the anterior horns of the spinal cord. Motor neurons in the anterior horns send signals to muscles.
7. The gray commissure connects the gray matter on the left and right sides of the spinal cord.
8. The central canal in the gray commissure of the spinal cord contains cerebrospinal fluid and is continuous with the ventricles of the brain.
9. The white matter of the spinal cord is divided into anterior, lateral, and posterior funiculi. Funiculi are bundles of nerve fibers.
10. The longitudinal bundles of nerve fibers within the spinal cord constitute major nerve pathways called tracts.

Answer:

1. spinal nerves
2. cervical enlargement
3. lumbar enlargement
4. posterior median sulcus
5. horns
6. anterior
7. gray commissure
8. central canal
9. funiculi
10. tracts