Bio 50A Take Home Assignment #2 (30pts) Name: Angelica Garcia
Chapters 18-20
In your own words, answer the following questions
Chapter 18:
1. For each of the following terms or phrases, write either S or P to label whether they’re a part of Sympathetic or Parasympathetic Nervous System:
__ P____ a. long preganglionic axon, short postganglionic axon
__ P_____ b. craniosacral output
__ P____ c. more widespread response
__P____ d. otic and ciliary ganglia
__S____ e. most active when you’re running a marathon
__S____ f. uses the neurotransmitter, norepinephrine
__P____ g. most active while your sitting on the couch eating potato chips
__S____ h. synapses in the celiac ganglion
2. List each of the cranial and sacral nerves that are associated with the parasympathetic system and an organ or gland that each innervates.
Four cranial nerves:
* Oculomotor (CN III)- innervates sphincter pupillae muscle in eye to make pupil constrict, ciliary muscles to control lens for accomodation
* Facial (CN VII)- lacrimal gland: glands of nasal cavity, palate or oral cavity, submandibular gland, sublingual salivary gland
* Glossopharyngeal (CN IX)- parotid salivary gland
* Vagus (CN X)- innervates smooth muscles and glands of heart, lungs, larynx, trachea(thoracic viscera), most abdominal viscera
Sacral nerves:
Pelvic Splanchnic Nerves- some abdominal viscera and most pelvis viscera
3. List the four main splanchnic nerves that are part of the sympathetic nervous system. Include in your answer which spinal nerves they originate from and which ganglion they terminate in
Four main splanchnic nerves:
* Greater thoracic splanchnic nerves: T5-T9
* Lesser thoracic splanchnic nerves: T10-T11
* Least thoracic splanchnic nerves: T12
* Lumbar splanchnic nerves: L1 and L2
They all terminate in sympathetic trunk ganglia and synapse on the prevertebral ganglia.
4. Explain the difference between motor neurons in...