1. A. Compare the action potentials observed in cardiac muscle and skeletal muscle. B. Then describe the...

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Medical Sciences

1. A. Compare the action potentials observed in cardiac muscleand skeletal muscle.
B. Then describe the action potential associated with thesinoatrial node.
C. Describe the conduction system of the heart.
2.A. State the equations used to determine SV and CO. State theaverage values for all components.
B. What happens to stroke volume when: i. ESV increases anddecreases ii. EDV increases and decreases iii. increasedsympathetic innervation iv. increased parasympathetic innervationv. afterload increases and decreases
C. Describe the RAS system that is activated when BP decreasesin afferent arterioles supplying the glomerular capsule.

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3.6 Ratings (652 Votes)

1 A skeletal muscle cardiac muscle Membrane potential 70 mV 90 mV Ion channel for reaching threshold Na entry by ACh channel Depolarisation through gap junction Depolarisation Na entry Na entry Repolarisation Rapid by K efflux Prolonged with plateau caused by Ca2 entry rapid phase by efflux of K hyperpolarisation By excessive K efflux none Refractory period Small Long Action Potential of SA node SA node is the pacemake See Answer

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