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PEShare.co.uk Shared Resource PEShare.co.uk Shared Resource Document Transcript

  • KEYWORDS AND DEFINITIONS KEYWORD DEFINITION Cardiac muscle that makes up the heart The ability of the heart to produce its own impulses Emits a cardiac impulse approximately 72 times per minute Part of the brain that controls the heart and respiratory rate Transmits nerve impulses from the central nervous system to the heart, lungs and smooth muscle without our conscious control Receptors in the body that detect changes in blood acidity, particularly CO2 and lactic acid Receptors in the body that detect increases in blood flow and blood pressure in the blood vessels An increase in venous return leads to a stronger ventricular contraction and therefore an increase in stroke volume % of blood pumped out of the left ventricle per contraction Reduction of resting heart rate to below 60 beats per minute usually due to endurance training Volume of blood ejected from the heart per minute Volume of blood ejected from the heart per beat The number of cardiac cycles per minute Pre exercise response of the heart to the release of adrenaline, results in an elevated heart rate Oxygenated blood from the left ventricle to the whole body and back to the right atrium Deoxygenated blood form the right ventricle to the lungs and back to the left atrium Reduction in the diameter of artery/arteriole walls. Increases Blood Pressure and helps to speed the flow of blood Increase in the diameter of artery/arteriole walls. Decreases Blood Pressure Redistribution of blood around the body so the working muscles receive more
  • In the veins to prevent backflow of blood Volume of blood that returns to the right side of the heart A venous return mechanism where muscles contract during exercise squeezing and pumping blood back towards the heart Ring of muscle at the entrance to the capillaries to control the blood flow Force of blood against the walls of the arteries during ventricular contraction Force of blood against the walls of the arteries during ventricular relaxation Increases the Heart Rate Decrease Heart Rate Atria fill with blood Ventricles fill with blood Atria contract forcing blood into ventricles Ventricles contract forcing blood into the aorta/pulmonary artery Enlargement of the heart muscle in response to training Match the words below to the definitions above: Anticipatory Rise Atria Diastole Atrial Systole Automatic Nervous System Baroreceptors Bradycardia Cardiac Hypertrophy Cardiac Output Chemoreceptors Diastolic Blood Pressure Ejection Fraction Frank Starling’s Mechanism Heart Rate Medulla Oblongata Myocardium Myogenic Parasympathetic Nervous System Pocket valves Pre Capillary Sphincter Pulmonary Circulation SA Node Skeletal Muscle Pump Stroke Volume Sympathetic Nervous System Systemic Circulaton Systolic Blood Pressure Vascular Shunt Vasoconstrict Vasodilate Venous Return Ventricular Diastole Ventricular Systole
  • KEYWORDS AND DEFINITIONS KEYWORD DEFINITION Myocardium Cardiac muscle that makes up the heart Myogenic The ability of the heart to produce its own impulses SA Node Emits a cardiac impulse approximately 72 times per minute Medulla Part of the brain that controls the heart and respiratory rate Oblongata Automatic Transmits nerve impulses from the central nervous system to Nervous System the heart, lungs and smooth muscle without our conscious control Chemoreceptors Receptors in the body that detect changes in blood acidity, particularly CO2 and lactic acid Baroreceptors Receptors in the body that detect increases in blood flow and blood pressure in the blood vessels Frank Starling’s An increase in venous return leads to a stronger ventricular Mechanism contraction and therefore an increase in stroke volume Ejection % of blood pumped out of the left ventricle per contraction Fraction Bradycardia Reduction of resting heart rate to below 60 beats per minute usually due to endurance training Cardiac Output Volume of blood ejected from the heart per minute Stroke Volume Volume of blood ejected from the heart per beat Heart Rate The number of cardiac cycles per minute Anticipatory Pre exercise response of the heart to the release of Rise adrenaline, results in an elevated heart rate Systemic Oxygenated blood from the left ventricle to the whole body Circulaton and back to the right atrium Pulmonary Deoxygenated blood form the right ventricle to the lungs and Circulation back to the left atrium Vasoconstrict Reduction in the diameter of artery/arteriole walls. Increases Blood Pressure and helps to speed the flow of blood Vasodilate Increase in the diameter of artery/arteriole walls. Decreases Blood Pressure Vascular Shunt Redistribution of blood around the body so the working muscles receive more Pocket valves In the veins to prevent backflow of blood Venous Return Volume of blood that returns to the right side of the heart Skeletal Muscle A venous return mechanism where muscles contract during View slide
  • Pump exercise squeezing and pumping blood back towards the heart Pre Capillary Ring of muscle at the entrance to the capillaries to control Sphincter the blood flow Systolic Blood Force of blood against the walls of the arteries during Pressure ventricular contraction Diastolic Blood Force of blood against the walls of the arteries during Pressure ventricular relaxation Sympathetic Increases the Heart Rate Nervous System Parasympathetic Decrease Heart Rate Nervous System Atria Diastole Atria fill with blood Ventricular Ventricles fill with blood Diastole Atrial Systole Atria contract forcing blood into ventricles Ventricular Ventricles contract forcing blood into the aorta/pulmonary Systole artery Cardiac Enlargement of the heart muscle in response to training Hypertrophy View slide