4. The two main factors for determining blood pressure are peripheral resistance and……….. A. Cardiac output B. Age C. Pulse pressure. D. Pulse deficit
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4. The two main factors for determining blood pressure are peripheral resistance and………..
A. Cardiac output
B. Age
C. Pulse pressure.
D. Pulse deficit
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- An electrical difference across the fibers of the heart is called the A. Absolute refractory period B. Resting membrane potential C. Action potential D. Depolarization32. In a blood pressure measurement of 110/70, the number70 is the ________.a. systolic pressureb. diastolic pressurec. pulse pressured. mean arterial pressure. Thanks17. Match the ECG wave information with the appropriate action potential in the following columns: a.P wave e.Depolarization of the AV node b.QRS complex f.Repolarization of ventricles c.PR segment g.Depolarization of ventricles d.T wave h.Depolarization of the atria Match the itmes in the left columns to the right columns.
- 2. Explain the pressure and volume changes in the ventricle during the following phases of the cardiac cycle; a. Isovolumetric contraction: b. Ejection: c. Isovolumetric relaxation: d. Rapid filling:25. Blood Volume affects blood pressure because it directly increases: A.Total Peripheral Resistance B.Stroke Volume C.End Systolic Volume D.Central Venous Pressure29. All of the followings are correct, except ---------------------. A. The mean blood pressure decreases with distance from the heart. B. The linear rate of blood flow is inversely proportional to total cross-sectional area. C. The highest blood velocity occurs at the capillaries. D. Capillaries consist of a single layer of endothelial cells surrounded by basement membrane and some contractile pericytes E. Substances move across walls of blood capillaries either through or between endothelial cells
- 1. The source of the electrical currents that you measured on the skin throughout a normal electrocardiogram is: a. regional differences in depolarization state between parts of the myocardium b. The SA node cells c. the opening and closing of the tricuspid and bicuspid valves d. depolarizations of the muscle and nerve cells close to the electrode site e. The AV node cells 2. Release or discharge from which of the following is likely to produce a slowing in the rate at which the AV node transmits a depolarization? a. Your coffee cup (caffeine) b. the posterior lobe of the pituitary gland (Oxytocin) c. the sympathetic nervous system d. the parasympathetic nervous system (vagus nerve) e. the medulla of the adrenal gland (epinephrine) 3.Which of the following is unlikely to affect the force of contraction of an individual ventricular myocyte (muscle cell)? a. the amount of…4. Define the following terms. a. Sinus rhythm b. systole c. diastole d. Ejection fraction e. Cardiac output33. In a blood pressure measurement of 110/70, the number70 is the ________.a. systolic pressureb. diastolic pressurec. pulse pressured. mean arterial pressure
- 7. State which of the 4 factors that affect resistance to blood flow changes the most on a minute to minute basis: 8. State in words AND in the simplified equation of Poiseuille's Law the relationship between blood vessel radius and resistance. a. Radius is directly related to resistance. (Insert either "directly" or "indirectly".) Thus ...1. Age-related changes in the heart’s electrical conduction system such as fibrosis and loss of specialized cells and fibers in the SA node and fibrosis of AV node and left anterior fascicle contribute to the development of (choose all that apply): a. Normal heart rate at rest b. Increase in atrial ectopy (irregular, rapid heartbeats) c. Increase in episodes of bradycardia (slow heart rate) d. Increased incidence of heart block. 2. Describe 3 age-related changes in the lungs that have a negative impact on preventing lung infections.6. What is the relationship between each of the following and the arterial blood pressure? a. Vasodilation in arterioles: b. Vasoconstriction in arterioles: c. Total peripheral resistance: d. Cardiac output: e. Stroke volume: f. Cardiac rate:
