Spinal Cord, Spinal Nerves, and ANS Lab HW 220

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Utah Valley University *

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Biology

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Feb 20, 2024

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Lab Homework Assignment The Spinal Cord, Spinal Nerves, and ANS Part I Directions: Using the images in your textbook Chapter 14, fill in the blanks below with the correct directional term (anterior, posterior, dorsal, ventral, superior, inferior, deep, superficial, medial, lateral, etc.). Assume the spinal cord is in anatomical position. Note: some may have multiple correct answers. You are only required to write one answer per blank, but you may put multiple if it has more than one correct answer. 1. The central canal is _________ to the gray matter. 2. The white matter is _________ to the gray matter. 3. The anterior median fissure is ___________ to the posterior median sulcus. 4. The cauda equina is ___________ to the conus medullaris. 5. The conus medullaris is _________ to the filum terminale. 6. The dorsal root ganglion is _________ to the ventral root. Part II Directions: Using your lab workbook and Chapter 14 of your textbook, answer the questions below. 7. How many cervical nerve pairs are there? ____ 8. How many thoracic nerve pairs are there? ____ 9. How many lumbar nerve pairs are there? ____ 10. How many sacral nerve pairs are there? _____ Part III Directions: Using the descriptions of spinal nerves in your lab workbook, trace the pathway of a nerve impulse from the spinal cord to the following locations. Example: Spinal Cord -> Spinal Nerves C5 – T1 -> Brachial Plexus -> Ulnar nerve -> Ulnar Region 11. Spinal Cord -> ____________ -> ____________ -> ____________ -> Shoulder/Armpit Region

12. Spinal Cord -> ____________ -> ____________ -> ____________ -> ____________ -> Medial Leg/Foot Region 13. Spinal Cord -> ____________ -> ____________ -> ____________ -> ____________ -> ____________ -> Fibularis Muscles Read section 15.1c and fill in the following table regarding ANS function. Hypothalamus Brainstem Spinal Cord List the spinal and or cranial nerves involved in the (Section 15.3): Parasympathetic nervous system Sympathetic nervous system Define the following components of the sympathetic nervous system: Sympathetic trunk/ganglia White Rami Gray Rami Splancnic nerves Prevertebral ganglia Celiac ganglia Superior mesenteric ganglia

Inferior mesenteric ganglia

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