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True or False
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1
All parasympathetic nerve fibers to the heart innervate the sinoatrial node.
A)True
B)False
2
Cardiac control centers in the medulla oblongata receive input from baroreceptors located in some of the arteries.
A)True
B)False
3
Stroke volume is directly proportional to end-diastolic volume.
A)True
B)False
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
5
The sympathetic nervous system has no significant effect on the ventricular contractility.
A)True
B)False
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
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
8
Something with a positive chronotropic effect on the heart increases the contractility of the muscle fibers.
A)True
B)False
9
Since arteries are more muscular than veins, they are said to have a greater compliance.
A)True
B)False
10
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
11
About 80% of the body's extracellular fluid is in the cells.
A)True
B)False
12
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
13
The oncotic pressure of the blood tends to promote uptake of water from the tissue fluid into the blood plasma.
A)True
B)False
14
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
15
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
16
Liver disease tends to reduce the blood pressure and lead to edema.
A)True
B)False
17
All of the fluid filtered by the capillaries of the kidneys is ultimately excreted as urine.
A)True
B)False
18
Less urine is excreted when the ADH level is low.
A)True
B)False
19
Decreased osmolality of the blood leads to decreased secretion of ADH.
A)True
B)False
20
Both ADH and aldosterone promote retention of water when one is dehydrated, but aldosterone does not lower the blood osmolality.
A)True
B)False
21
Angiotensinogen is secreted by the kidneys and then converted in the lungs to the vasoconstrictor named angiotensin II.
A)True
B)False
22
Parasympathetic fibers innervating blood vessels are always cholinergic and stimulate vasodilation.
A)True
B)False
23
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
24
The sympathetic nervous system is much more important than the parasympathetic system in regulating arterial blood flow.
A)True
B)False
25
A drop in arterial blood pressure causes cerebral arteries to constrict.
A)True
B)False
26
Blood flow through the coronary arteries is greatest during ventricular disatole and drops during systole.
A)True
B)False
27
Coronary blood flow is reduced during systole so the myocardium must temporarily rely on anaerobic respiration.
A)True
B)False
28
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
29
During heavy exercise, blood circulation to the skin increases to dissipate the excess body heat.
A)True
B)False
30
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
31
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
32
Cerebral arteries constrict when blood pressure rises to about 200 mmHg.
A)True
B)False
33
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
34
Total peripheral is controlled by vasomotor control centers in the medulla oblongata.
A)True
B)False
35
The baroreceptor reflex responds to changes in blood pressure to increase or decrease heart rate and total peripheral resistance.
A)True
B)False
36
Orthostatic hypotension is due to a defect of the baroreceptor reflex.
A)True
B)False
37
The sounds of Korotkoff are created by turbulent blood flow through an occulded blood vessel.
A)True
B)False
38
Laminar blood flow through the brachial artery cannot be heard with the stethoscope.
A)True
B)False
39
In the auscultatory method of taking blood pressure, no sound is heard above the systolic pressure because laminar flow of blood is silent.
A)True
B)False
40
Pulse pressure is the difference between systolic and diastolic blood pressures.
A)True
B)False
41
If a person had an arterial blood pressure of 102/62, the mean arterial pressure would be 82 mmHg.
A)True
B)False
42
Essential hypertension is high blood pressure of unknown cause.
A)True
B)False
43
Hypertension should inhibit the production of renin, so it follows that most hypertensive patients have lower than normal plasma renin levels.
A)True
B)False
44
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
45
Hypertension can be treated with anti-diuretic drugs.
A)True
B)False
46
Hypovolemic shock results from an infection.
A)True
B)False
47
Hypovolemic shock tends to cause a patient to have a rapid pulse and cold, clammy skin.
A)True
B)False





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