Question

(10/13/25) formative assessment assignment: ch 7 the nervous system: spinal cord - aut
12 of 12
the autonomic nervous system has two arms, the sympathetic and the parasympathetic (figure 7.27). both serve the same organs but cause essentially opposite effects, counterbalancing each others activities to keep body systems running smoothly. the sympathetic division mobilizes the body during ( 1 ) situations (such as fear, exercise, or rage), whereas the parasympathetic division allows us to unwind and conserve energy. we examine these differences in more detail shortly, but first lets consider the structural characteristics of the two arms of the ans
anatomy of the parasympathetic division
the preganglionic neurons of the parasympathetic division are located in brain ( 2 ) of several cranial nerves—iii, vii, ix, and x (the vagus being the most important of these) and in the s2 through s4 levels of the spinal cord (see figure 7.27). for this reason, the parasympathetic division is also called the ( 3 ) division. the neurons of the cranial region send their axons out in cranial nerves to serve the head and neck organs. there they synapse with the ganglionic motor neuron in a terminal ganglion. from the terminal ganglion, the postganglionic ( 4 ) extends a short distance to the organ it serves. in the sacral region, the preganglionic axons leave the spinal cord and form the pelvic splanchnic (splanknik) nerves, also called the pelvic nerves, which travel to the pelvic cavity. in the pelvic cavity, the preganglionic axons synapse with the second motor neurons in terminal ganglia on, or close to, the ( 5 ) they serve.

o 1. extreme 2 nuclei 3. craniosacral 4 axon 5. organs

o 1 organs 2. extreme 3. nuclei 4. craniosacral 5. axon

o 1 axon 2 organs 3 extreme 4 nuclei 5. craniosacral

o 1. nuclei 2 craniosacral 3. axon 4. organs 5. extreme

o 1. craniosacral 2. axon 3. organs 4. extreme 5. nuclei

Explanation:

The sympathetic division mobilizes the body during extreme situations. Preganglionic neurons of the parasympathetic division are in brain nuclei of certain cranial - nerves and S2 - S4 of the spinal cord, so it's called the craniosacral division. Postganglionic axons extend to organs. In the pelvic cavity, preganglionic axons synapse with second motor neurons in terminal ganglia on or close to the organs they serve.

Answer:

1. extreme 2. nuclei 3. craniosacral 4. axon 5. organs