Cardio Lab Essay

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CardioLab1 1. Please watch all ADAM animations and clinical illustrations as directed in the iLab and complete questions 1-5 on the ADAM software portion. 2. In addition, complete the PowerPhys portion of the lab as instructed in the week 1 iLab section of the course. 3. Given the following table and heart measurements, answer the questions below. Please answer these questions "in general" . Solution | Heart rate | Epinephrine | 78 | Pilocarpine | 44-45 | Atropine | 69 | Digitalis | 42 | 5 deg Ringer’s | 49 | 32 deg Ringer’s | 69 | Potassium | 54 | Calcium | 55 | Sodium | 54 | 1) What affect does epinephrine have on cardiac muscle? Epinephrine relaxes and contracts the heart, arteries and veins. It regulates heart rate, blood vessel and air passage diameters, and metabolic shifts. 2) Compare the effects of pilocarpine and atropine on cardiac muscle? Why does each chemical effect heart rate as it does? Pilocarpine decreases the heart rate. Atropine increases the heart rate. Pilocarpine it increases the effects of acetylcholine in the body. Acetylcholine is used by the parasympathetic nervous system to regulate the heart rate by decreasing it. Since pilocarpine increases the activity of the parasympathetic nervous system, it decreases the heart rate. Atropine competes with acetylcholine for the binding cites on the receptors. Once atropine binds, it blocks the binding of acetylcholine and thus blocks the effects of acetylcholine – which regulates the heart rate by decreasing it. Since acetylcholine cannot bind the heart rate increases. 3) How does digitalis slow the heart rate? Digitalis decreases the heart rate by reducing the number of electrical impulses that pass through the atrioventricular node into the lower heart chambers. Digitalis strengthens ventricular contractions so that
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