Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
What are the two main branches of the ANS?
|
1) Afferent (sensory) branch
2) Efferent (motor) branch |
|
|
Which branch of the ANS is further divided into the sympathetic and the parasympathetic branches?
|
The efferent/motor branch
|
|
|
Which functions and tissues are under the control of the motor branch of the ANS?
|
1) Involuntary motor function - smooth muscle, cardiac muscle
2) Release of chemicals from glands |
|
|
Which neurotransmitters are used at cholinergic synapses?
|
Acetylcholine (ACh) and only acetylcholine.
|
|
|
What are the difference between pre-ganglionic and post-ganglionic neuronal axons in the ANS?
|
Pre-ganglionic axons are small-diameter, myelinated B fibers. Post-ganglionic axons are even smaller-diameter unmyelinated C fibers.
|
|
|
Name the neurotransmitter released by all cholinergic neurons:
|
All cholinergic neurons by definition release acetylcholine (ACh) and only acetylcholine
|
|
|
Do "sympathetic" and "adrenergic" mean the same thing?
What about "parasympathetic" and "cholinergic"? Why or why not? |
The answer is no!
Adrenergic/cholinergic refers only to the kind of neurotransmitter released by a neuron. If a neuron releases noradrenaline, it is adrenergic. If a neuron releases acetylcholine, it is cholinergic, even if it is part of a sympathetic pathway. All pre-ganglionic neurons in the ANS, including sympathetic pre-ganglionic neurons, are cholinergic because they release acetylcholine. |
|
|
Which neurotransmitter do sympathetic pre-ganglionic neurons release?
|
Acetylcholine
|
|
|
Name the neurotransmitter released by adrenergic neurons:
|
All adrenergic neurons release noradrenaline by definition.
What about adrenaline? |
|
|
Which receptor type is found on all post-ganglionic neurons?
|
Nicotinic cholinergic (because all pre-ganglionic neurons release acetylcholine)
|
|
|
Which receptor type is found on the effectors innervated by post-ganglionic parasympathetic neurons?
|
Muscarinic cholinergic receptors
|
|
|
Which autonomic receptor type is found on airway smooth muscle?
|
Beta-2 adrenergic receptors
|
|
|
Which autonomic receptor type is found on coronary vessel smooth muscle?
|
Beta-2 adrenergic receptors
|
|
|
Which autonomic receptor type is found on blood vessel smooth muscle cells?
|
Alpha-1 adrenergic receptors
|
|
|
Which neurotransmitter is released by post-ganglionic parasympathetic neurons?
|
Acetylcholine
|
