Autonomic Innervation, Hormones, Drugs
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Where does the ANS innervate for the control of contraction? | exerted on SA and/or AV Nodes
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| Which division of the ANS is normally dominant? | Parasympathetic
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| What Neurotransmitter & receptor type does the Parasympathetic use? | Acetylcholine - Cholinergic receptors
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| What effect does Acetylcholine have on RP? | Hyperpolarize
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| What is the function of the Parasympathetic? | REDUCES HR and Contractility
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| What is the significance of the Parasympathetic on the heart? | HYPERPOLARIZES Cardiac RP via
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| Where do Sympathetic impulses come from? | Thoracic Nerve Branches
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| Where do Parasympathetic impulses come from? | Vagus Nerve
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| Where does the Neurotransmitter Epinephrine come from? | Adrenal Glands
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| What are the 2 receptors that accept Epinephrine? | ß-1 and ß2
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| What is the result of Epinephrine binding to a ß-1 receptor? | DEPOLARIZATION --> INCREASE Rate/Force of Contraction
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| What is the result of Epinephrine binding to a ß-2 receptor? | HYPERPOLARIZATION --> Vasodialation
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| What 3 factors influence HR? | Drugs, Hormones, ANS
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| What are the 2 types of Drugs which effect the control of contraction? | Cholenergic blockers & ß-blockers
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| What type of blocker is Atropine, and how does it work? | Cholenergic - blocks Acetylcholine --> blocks Parasympathetic -->
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| How do ß-blockers work? | blocks ß-1 --> cancel Noerepinephrine --> DECREASE HR/BP
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| What is the Neurotransmitter used by the Sympathetic NS? | Norepinephrine
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| How does Norepinephrine effect the Heart? | DEPOLARIZES Cardiac RP via ^ Na+/Ca++ Permeability
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| What is the function of the Sympathetic division of the ANS? | INCREASES HR and Contractility
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Created by:
Kristel
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