Download Biology 2121 – Lecture Sheet – ANS 1. The autonomic nervous sy

Biology 2121 – Lecture Sheet – ANS
1. The autonomic nervous system contains ______________ neurons only. They service organs with ____________ or __________
muscle tissue.
2. The two divisions of the ANS are the __________________ and ____________________ divisions.
3. The term duel innervation means: _______________________________________________________
4. The parasympathetic division is referred to as the ___________________________________.
5. The sympathetic division is referred to as the ____________________________________.
6. Provide a couple of examples of what the sympathetic nervous system does to organs.
7. Do the same for the parasympathetic system below:
8. What is vasomotor tone? Which ANS division controls this?
9. The ___________________ division of the ANS causes an erection to occur during sexual activity, and the ______________
division is responsible for an ejaculation.
10. The parasympathetic division promotes increased __________________ during digestion. The sympathetic system would
__________________ the anal sphincters and decrease the ____________ and smooth muscle of the digestive system.
11. Determine the effects of the parasympathetic and sympathetic system on each of the following organs.
Organ
Iris of the Eye
Parasympathetic
Sympathetic
Salivary glands
Sweat glands
Heart muscle
The Heart
Lungs
12. Explain the role of the sympathetic nervous system on thermal regulation of the body.
13. All somatic motor neurons release the neurotransmitter _________________. The ANS neurons release ______________ and
____________________.
14. Somatic motor neurons are ______________ myelinated and the ANS are __________________________ mylenated.
15. The ANS is a one-neuron unit and the ANS motor neurons are composed of _______ neurons called the ____________________
neurons and ____________________ neurons.
16. All sympathetic preganglionic axons release the neuron transmitter _________. The postganglionic axons release
_________________ or ____________________.
17. All preganglionic cell bodies of the ANS reside in the _____________ ________ or brain.
18. All sympathetic neuron cell bodies of postganglionic neurons lie in the ________________ ___________ ganglia. Postganglionic
cell bodies of parasympathetic neurons lie very close to the ________________.
19. Fibers that release the neurotransmitter ACh are called ________________ fibers. All fibers that release norepinephrine are called
____________ fibers.
20. When ACh binds to nicotinic receptor the response is always ______________.
21. Complete the neurotransmitter receptor table below:
Neurotransmitter
Acetylcholine
Receptor
Location
Effects of Binding
Nicotinic
Muscarinic
Norepinephrine
Beta 1
Beta 2
Beta 3
Alpha 1
Alpha 2
22. The four parasympathetic nerves which originate in the cranial area are the _________________, __________________,
________________________, _________________________.
23. The function of CN III (oculomotor) is to cause the pupil to ______________ and the lens to ______________.
24. The function of CN VII is to stimulate secretions of the _____________ and _____________ glands.
25. CN IX activates the _____________ salivary gland .
26. CN X innervates the ___________, _____________ and most _____________ organs down to the proximal large intestine.
27. Parasympathetic outflow from the sacral area innervates the distal ___________________, urinary ___________ and the
____________ and the reproductive organs.
28. The nerves that leave the sacral area via the ventral rami are called the __________________ nerves and join to form the
__________________ plexus.
29. The cell bodies of the sympathetic preganglionic neurons can be found in this portion of the spinal cord: _____________. They
exit via the _______________ horns of gray.
30. All preganglionic neurons that synapse in the chain ganglia move from the ventral rami through the White Ramus ___________ to
the ganglia. After synapsing in the chain ganglia they exit and move towards their target organs through the __________ ramus
___________.
31. Not all synapse in the chain ganglia. Some preganglionic neurons by pass the ganglia and synapse in the ___________ ganglia
(example the celiac ganglia). These form the sympathetic ________________ nerves.
32. The lumbar splanchnic nerves innervate the _____________________________. The greater splanchnic nerves innervate the
_______________________. The lesser splanchnic nerves innervate the _______________________________.
33. Sympathetic nerves originating in T1-T4 innervate the __________ region including the organs
________________________________.
34. T1-T6 innervate the ____________________region. They innervate the heart via the _____________ plexus.
35. T5-L2 bypass the chain ganglia and synapse in the ________________ ganglia. They form the _______________ nerves.
36. T5-L2 nerves serve the _____________________________________________________.
37. T10-L2 nerves serve the ____________________________________________________.