Question

question 1
1 pts
several \vital centers\ are located in the:
basal ganglia.
cerebrum.
cerebellum.
medulla.
question 2
1 pts
the autonomic nervous system includes only efferent neurons.
true
false
question 3
1 pts
which of the following is not a plexus of the spinal nerves?
cervical
brachial
lumbar
thoracic

Explanation:

• Question 1: The medulla oblongata contains vital centers (e.g., respiratory, cardiac, vasomotor centers). The basal ganglia are involved in motor control, the cerebrum in higher - order functions like thought and memory, and the cerebellum in motor coordination.
• Question 2: The autonomic nervous system has both afferent (sensory) and efferent (motor) neurons. Afferent neurons provide feedback about the internal environment (e.g., blood pressure, gut distension) to the central nervous system.
• Question 3: The spinal nerve plexuses include the cervical, brachial, lumbar, and sacral plexuses. The thoracic spinal nerves do not form a major plexus in the same way as the others; they mainly form intercostal nerves.

Answer:

• Question 1: medulla
• Question 2: False
• Question 3: Thoracic