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1 | | All parasympathetic nerve fibers to the heart innervate the sinoatrial node. |
| | A) | True |
| | B) | False |
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2 | | Cardiac control centers in the medulla oblongata receive input from baroreceptors located in some of the arteries. |
| | A) | True |
| | B) | False |
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3 | | Stroke volume is directly proportional to end-diastolic volume. |
| | A) | True |
| | B) | False |
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4 | | The heart's contractility is adjusted so that normally each ventricle expels all the blood contained in it, leaving none behind in the chamber. |
| | A) | True |
| | B) | False |
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5 | | The sympathetic nervous system has no significant effect on the ventricular contractility. |
| | A) | True |
| | B) | False |
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6 | | If the ventricles did not fill with blood at all, but the electrical conduction system stimulated them to contract anyway, the contraction would be very weak. |
| | A) | True |
| | B) | False |
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7 | | In spite of the fact that the systemic vessels cover substantially more total length than the pulmonary vessels, the same amount of blood must flow through both of these systems in a given time. |
| | A) | True |
| | B) | False |
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8 | | Since arteries are more muscular than veins, they are said to have a greater compliance. |
| | A) | True |
| | B) | False |
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9 | | Since the veins contain most of the body's blood at any one time, they have a higher blood pressure than any other type of vessel. |
| | A) | True |
| | B) | False |
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10 | | About 80% of the body's extracellular fluid is in the cells. |
| | A) | True |
| | B) | False |
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11 | | The net filtration pressure of the capillaries is mathematically equal to the hydrostatic pressure that tends to promote filtration minus the osmotic pressure than tends to promote absorption. |
| | A) | True |
| | B) | False |
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12 | | The oncotic pressure of the blood tends to promote uptake of water from the tissue fluid into the blood plasma. |
| | A) | True |
| | B) | False |
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13 | | If the Starling forces formula, (Pc + pi) - (Pi + pp), yields a positive number, it means the net Starling forces promotes absorption of fluid into a capillary. |
| | A) | True |
| | B) | False |
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14 | | All fluid that is filtered at the arteriolar end of a capillary and percolates through the tissues must be reabsorbed at the venular end in order to maintain plasma fluid balance. |
| | A) | True |
| | B) | False |
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15 | | Liver disease tends to reduce the blood pressure and lead to edema. |
| | A) | True |
| | B) | False |
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16 | | All of the fluid filtered by the capillaries of the kidneys is ultimately excreted as urine. |
| | A) | True |
| | B) | False |
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17 | | Less urine is excreted when the ADH level is low. |
| | A) | True |
| | B) | False |
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18 | | Decreased osmolality of the blood leads to decreased secretion of ADH. |
| | A) | True |
| | B) | False |
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19 | | Both ADH and aldosterone promote retention of water when one is dehydrated, but aldosterone does not lower the blood osmolality. |
| | A) | True |
| | B) | False |
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20 | | Angiotensinogen is secreted by the kidneys and then converted in the lungs to the vasoconstrictor named angiotensin II. |
| | A) | True |
| | B) | False |
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21 | | Parasympathetic fibers innervating blood vessels are always cholinergic and stimulate vasodilation. |
| | A) | True |
| | B) | False |
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22 | | All blood vessels receive both sympathetic and parasympathetic nerve fibers so their diameters can be regulated by a balanced "push-pull" homeostatic control mechanism. |
| | A) | True |
| | B) | False |
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23 | | The sympathetic nervous system is much more important than the parasympathetic system in regulating arterial blood flow. |
| | A) | True |
| | B) | False |
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24 | | A drop in arterial blood pressure causes cerebral arteries to constrict. |
| | A) | True |
| | B) | False |
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25 | | Blood flow through the coronary arteries is greatest during ventricular disatole and drops during systole. |
| | A) | True |
| | B) | False |
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26 | | Coronary blood flow is reduced during systole so the myocardium must temporarily rely on anaerobic respiration. |
| | A) | True |
| | B) | False |
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27 | | Sustained muscle contractions will cause faster onset of fatigue than a series of short contractions because the blood flow through a skeletal muscle is diminished or shut off during strong contractions. |
| | A) | True |
| | B) | False |
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28 | | During heavy exercise, blood circulation to the skin increases to dissipate the excess body heat. |
| | A) | True |
| | B) | False |
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29 | | During heavy exercise, the heart beats faster and has less time to fill between beats, so the end-diastolic volume is reduced. |
| | A) | True |
| | B) | False |
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30 | | Cerebral blood flow remains fairly constant at about 750 ml/min, in spite of changes in brain activity, blood pressure, and blood flow to other organs. |
| | A) | True |
| | B) | False |
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31 | | Cerebral arteries constrict when blood pressure rises to about 200 mmHg. |
| | A) | True |
| | B) | False |
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32 | | The skin is vital to thermoregulation of the body and therefore cannot tolerate a reduced flow of blood for very long. |
| | A) | True |
| | B) | False |
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33 | | The baroreceptor reflex responds to changes in blood pressure to increase or decrease heart rate and total peripheral resistance. |
| | A) | True |
| | B) | False |
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34 | | Orthostatic hypotension is due to a delay in the onset of the baroreceptor reflex. |
| | A) | True |
| | B) | False |
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35 | | The sounds of Korotkoff are created by turbulent blood flow through an occulded blood vessel. |
| | A) | True |
| | B) | False |
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36 | | Laminar blood flow through the brachial artery cannot be heard with the stethoscope. |
| | A) | True |
| | B) | False |
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37 | | In the auscultatory method of taking blood pressure, no sound is heard when the cuff is inflated above the systolic pressure because laminar flow of blood is silent. |
| | A) | True |
| | B) | False |
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38 | | Pulse pressure is the difference between systolic and diastolic blood pressures. |
| | A) | True |
| | B) | False |
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39 | | If a person had an arterial blood pressure of 102/62, the mean arterial pressure would be 82 mmHg. |
| | A) | True |
| | B) | False |
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40 | | Essential hypertension is high blood pressure of unknown cause. |
| | A) | True |
| | B) | False |
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41 | | "Most patients with hypertension will have low levels of renin secretion via a negative feedback loop inhibition." |
| | A) | True |
| | B) | False |
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42 | | By the time a patient shows any symptoms of hypertension, there usually has already been considerable damage to the circulatory system. |
| | A) | True |
| | B) | False |
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43 | | Hypertension can be treated with anti-diuretic drugs. |
| | A) | True |
| | B) | False |
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44 | | Hypovolemic shock results from an infection. |
| | A) | True |
| | B) | False |
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45 | | Hypovolemic shock tends to cause a patient to have a rapid pulse and cold, clammy skin. |
| | A) | True |
| | B) | False |
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