NPB101L Practical Review

Exercise increases the demand for o2 and produces

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: R will be ____________ than late diastole WHY? Post- ESC •  Frank- Starling ESC Law Comp. •  ESC has less &me Pause to fill so it has a smaller contrac&on •  Post- ESC has a longer &me to fill so it has a greater contrac&on •  Compensatory pause caused by refractory period of ventricle not allowing depolariza&on of muscle cells - > no contrac&on 1.67 grams Mechnical Trace 0.83 0.00 -0.83 994.37 seconds 997.91 1001.45 Part 2: Vagal S&mula&on •  VAGUS nerve was s&mulated to produce bradycardia (decrease HR) and cardiac arrest WHY? •  Vagus nerve carries parasympathe&c nerves that release ACh •  ACh will slow pacemaker ac&vity in SA node and decrease conduc&on of APs through the AV node •  VAGAL ESCAPE  PNS highly innervates SA node, but not AV node or ectopic cells • Other pacemaker cells takeover as the “driver” of HR but will not have as fast of rate as SA node...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online