KINE 3012 Study Guide - Final Guide: Renal Function, Stroke Volume, Edema
19 Apr 2018
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Local control of blood flow: active or reactive hyperemia within tissue, no hormones or nerves needed. In reactive where there is lack of blood flow. Brings in fresh 02 and washes away excess metabolites. ^ h+ (ex. decrease ph, lactic acid) important in heart, skeletal muscle/brain. In brain mri, images functional hyperemia response to neuronal activity to map out regions of brain activated during certain tasks. Researches able to identify/diagnose with increased blood flow and metabolites to certain areas. Coronary artery blood flow reactive hyperemia (lack of blood flow: period of reduced flow caused by ventricular contraction (accumulation of metabolites, period of flow recovery during vent. Relaxation (reactive huperemia reacting to period of reduced blood flow) mostly in endocardium (inner layer of lv) Able to makeup for deficit in blood flow during systole: flow autoregulation myogenic response. A. increase map > passive distension of arteriole wall (opening it up) > ^ blood flow.
