OCR A Level PE 2.2 Adaptations Cardiovascular System 2.0 / 5 based on 1 rating ? Physical EducationExercise physiologyASOCR Created by: nclyamak1Created on: 13-03-18 20:34 Cardiac Hypertrophy Increased SV (at rest and during exercise) and CO (at rest) Due to the increased filling capacity and force of ventricular contraction Decreased resting HR (<60 bpm = bradycardia) and HR recovery after exercise 1 of 6 Increased Elasticity of Arterial Walls Increased efficiency of vascular shunt mechanism Increased vasoconstriction and dilation to redistribute CO Decreased resting blood pressure and increased blood pressure regulation 2 of 6 Increased Blood / Plasma Volume Lower blood viscosity Aids blood flow and venous return 3 of 6 Increased Number of Red Blood Cells / Haemoglobin Increase in oxygen-carrying capacity Increased gaseous exchange 4 of 6 Capillarisation Surrounding Alveoli and S.O Muscle Increased surface area for blood flow Increased gaseous exchange Decreased distance for diffusion 5 of 6 Overall Increased blood flow and oxygen transport to the muscle cells Decreased blood pressure Makes it easier to perform exercise, reduces the onset of fatigue, delays OBLA and increases the intensity and duration of performance Lower risk of coronary heart disease, hypertension (chronic high blood pressure) and stroke 6 of 6
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