Ch. 19
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| What are the four major structures that compose the conduction system of the heart? | show 🗑
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| show | SA node- initiates each heartbeat and sets its pace
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| show | SA node and AV node
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| What generates contraction in ventricles? | show 🗑
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| What is a graphic record of the hearts electrical activity (its conduction of impulses)? | show 🗑
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| What is a normal EKG comprised of? | show 🗑
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| What is another word for contraction? | show 🗑
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| show | diastole
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| What is a complete heartbeat consisting of systole and diastole of both atria and both ventricles? | show 🗑
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| What consists of a later, longer period of slow ventricular filling at the end of ventricular diastole lasting approximately 0.2 second; characterized by a gradual increase in ventricular pressure and volume? | show 🗑
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| What is the first sound, believed to be caused primarily by the contraction of the ventricles and by vibrations of the closing AV valves? | show 🗑
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| What consists of short, sharp sound; thought to be caused by vibrations of the closing of SL valves? | show 🗑
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| P1-P2 is the symbol used to stand for what? | show 🗑
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| show | P1 (P2 represents the lower pressure)
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| show | Perfusion pressure
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| Volume of blood pumped out of the heart per unit of time is called what? | show 🗑
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| show | stroke volume and heart rate
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| show | volume pumped per heartbeat
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| show | Within limits, the longer, or more stretched, the heart fibers at the
beginning of contraction, the stronger the contraction
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| show | cardiac pressoreflexes
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| What are the two types cardiac pressoreflexes? | show 🗑
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| show | Peripheral resistance
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| What are two factors that influence peripheral resistance? | show 🗑
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| What are muscles in the walls of arteriole that may constrict or dilate, thus changing diameter or arteriole? | show 🗑
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| show | Regulating blood pressure
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| What is the the thickness of blood as a fluid called? | show 🗑
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| What, in high concentration, can slightly increase blood viscosity? | show 🗑
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| What can increase blood viscosity? | show 🗑
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| show | Vasomotor chemoreflexes
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| show | venous return
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| What structure in veins prevents backflow of blood? | show 🗑
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| show | mechanisms that change total blood volume most quickly are those that cause water to quickly move into or out of the plasma
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| show | ADH
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| show | Renin
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| What is an intermediate compound that causes vasoconstriction, which complements the volume-increasing effects of renin and promotes an increase in overall blood flow? | show 🗑
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| What is the combination of Renin and Angiotensin II called when it changes total blood volume? | show 🗑
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| What adjusts venous return from an abnormally high level by promoting the loss of water from plasma, causing a decrease in blood volume; increases urine sodium loss, which causes water to follow osmotically? | show 🗑
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| What is systolic blood pressure? | show 🗑
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| show | Lowest pressure (force) of the blood pushing against the Aorta (when ventricles are relaxed)
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| show | difference between systolic and diastolic blood pressure
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| show | alternate expansion and recoil of an artery
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