17779090
Description
Flashcards by Sam Gunnell, updated more than 1 year ago
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Created by Sam Gunnell
about 5 years ago
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| Question | Answer |
| What are the two nerves involved with controlling heart rate? | Vagus nerve Sympathetic nerve |
| What is the function of the vagus nerve? | To release acetycholine next o the cells of the SAN to slow heart rate |
| What is the function of the sympathetic nerve? | Releases noradrenaline which makes heart rate faster |
| What are the two drugs used to adjust a patient's heart rate? | Digoxin Propranol |
| What does digoxin do? How? | Increases the force of cardiac contractions. It inhibits the Na-K pump in the plasma membrane of the muscle cells. As a result Na ions collect in the cell, along with Ca ions to increase the force of contractions |
| What does propranol do? How? | Reduces the persons' heart rate. It reduces the effects of noradrealin on the SAN |
| What are the possible side effects of propranol? | Angina |
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