Spinal Cord and ANS

The anterior (ventral) horn of the spinal cord contains the cell bodies of 

• motor neurons to skeletal muscle
• sensory neurons
• motor neurons to smooth muscle

• motor neurons to cardiac muscle

Sensory neurons entering the spinal cord 

• synapse in the ventral horn.

• have their cell bodies in the dorsal root ganglia but synapse in the dorsal horn

• have a multipolar structure

• synapse in the lateral horn

The somatic system contains nerves that control _________.

• skeletal muscles
• internal organs, joints, and glands
• skeletal muscles, skin, and glands
• smooth muscles, cardiac muscles and glands

The peripheral nervous system includes mixed nerves that _________. 

• serve the muscular and skeletal system
• serve the sympathetic system
• serve the parasympathetic system
• contain both sensory and motor fibers

How many neurons are involved in transmitting sensory information from the skin to the post-central gyrus?

• 1

• 2

• 3

• 4

What percentage of motor neurons that control the skeletal muscles of the limbs and face crossover on their way to the spinal cord from the brain?

• 10%

• 50%

• 90%

• 100%

What is the inferior-most nervous-functional portion of the spinal cord?

• cauda equina

• lumbar enlargement

• filum terminale

• conus medullaris

Which part of the spinal cord is organized into tracts?

• Gray Matter

• White Matter

Which structure allows for "Fight-or-Flight" control for all spinal cord levels above T1 or below L2?

• transverse foramen

• sympathetic chain/trunk

• cranial nerves

• splanchnic nerves

Pre-ganglionic neurons that enter the sympathetic chain but exit before synapsing will form the

• pelvic splanchnic nerves

• abdominal splanchnic nerves

• one of four cranial nerves

• rami communicans