KINE 433- exercise physiology || A+ Graded Already.

Without neurological involvement? what is a resting heart rate correct answers 60-100 bpm without the influence of the ________ nervous system resting heart rate would be 100 bpm correct answers parasympathetic what is considered a normal resting heart rate correct answers 60-80/100 bpm How does on predict maximal heart rate correct answers 220 - (age) 4 respiratory steps to continuously carry oxygen to and remove CO2 from all body tissues: correct answers 1. pulmonary ventilation (external respiration) 2. pulmonary diffusion (external respiration) 3. transport of gasses via blood 4. capillary diffusion (internal respiration) Describe the mechanisms of the SA node and the role it has in the heart- correct answers - fibers located in the upper posterior wall of the right atrium - known as the heart "pacemaker" - initiates the electric impulses to stimulate contraction to AV node Diastole correct answers occurs when the heart "relaxes" after contraction - chambers fill with blood - twice as long as systolic phase - lowest pressure in artery (bottom #) Systole correct answers occurs when the heart "contracts" to pump blood out - ventricles contract and expel blood into aorta & pulmonary arteries - highest pressure in artery (top #) T-wave on ECG correct answers ventricular repolarization P-wave on ECG correct answers atrial depolarization - occurs when the electrical impulse travels from the SA node through the atria to the AV node stimulates contraction 1st wave on ECG and positive wave heart conduction; order of activation correct answers 1. SA node: impulse for a normal heart contraction is initiated 2. AV node: conducts the electrical impulse from the atria to the ventricles 3. AV bundle: right & left branches, send impulse towards heart; branches subdivide into smaller & spread to ventricular wall 4. Purkinje fibers: terminal branches of AV bundle. transit impulse ion ventricles 6 times faster than rest of system