AP 151
Study Guide-Autonomic Nervous System
1. What are the major divisions of the ANS?
2. What are the major types of effectors controlled by the ANS?
3. Some ANS fibers are called “cholinergic fibers”. What does that mean?
4. What specific fibers of the ANS are cholinergic?
5. Some ANS fibers are called “adrenergic fibers”. What does that mean?
6. What specific fibers of the ANS are adrenergic fibers?
7. What are the major classes of cholinergic receptors?
8. On what cells would you find nicotinic receptors?
9. Binding of ACh to nicotinic receptors has an (excitatory? inhibitory?) effect on the postsynaptic
membrane. Why?
10. When ACh binds to muscarinic receptors another complex is activated that determines the action
of the cell. What is that complex called?
11. Will the binding of ACh to muscarinic receptors always produce the same effect? Yes? No?
Why or why not?
12. What are the major classes of adrenergic receptors?
13. On what cells would you find adrenergic receptors?
14. Will the binding of ACh to adrenergic receptors always produce the same effect? Yes? No?
Why or why not?
15. Some structures like the SA node of the heart receive both parasympathetic and sympathetic post-
ganglionic fibers? What term describes this?
16. Most organs of the body are innervated by both divisions of the ANS. But some are innervated only
by the sympathetic division? What are some examples?
17. Give an example of what the text calls “cooperative effects” of the ANS.
18. Which division of the ANS has a more general effect on the body (that is, more organs respond at
one time)? Why?
19.Which division has a major influence under conditions of physical activity or stress?
20. Which division has a major influence under resting conditions?
21. What organ lacks a SYMPATHETIC POSTGANGLIONIC NEURON? Why?
22. Define “sympathomimetic”
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