Please answer all questions.

1			A dilation in a vein is called a varicosity.
			A)	True
			B)	False
2			Atrial natriuretic peptide is a hormone released from the heart in response to low blood pressure.
			A)	True
			B)	False
3			Since atria always receive blood, the vessels attached to them are all termed veins.
			A)	True
			B)	False
4			An infection in an arm could spread directly to the heart.
			A)	True
			B)	False
5			The chordae tendineae are fibrous strings that attach the papillary muscles to the semilunar valves.
			A)	True
			B)	False
6			The tricuspid valve prevents a back flow of blood into the right atrium.
			A)	True
			B)	False
7			During the contraction of the ventricles, all of the valves attached to the skeleton of the heart close.
			A)	True
			B)	False
8			The blood in the pulmonary arteries has a relatively high carbon dioxide concentration.
			A)	True
			B)	False
9			Patients complain of diaphoresis, which is difficulty breathing, during a myocardial infarction.
			A)	True
			B)	False
10			The coronary circulation has a rich array of anastomoses between its arteries and veins.
			A)	True
			B)	False
11			Pressure within the atria is greatest when the ventricles are relaxing and the atria are contracting.
			A)	True
			B)	False
12			As the ventricles contract, the pressure in them exceeds the pressure in the atria.
			A)	True
			B)	False
13			A murmur is a heart sound heard when the valves do not close sufficiently.
			A)	True
			B)	False
14			A functional syncytium occurs when one cardiac muscle cell causes the ones around to inhibit their beat.
			A)	True
			B)	False
15			An injection of acetylcholine into the heart could decrease the rate of the heart.
			A)	True
			B)	False
16			The sympathetic nervous system usually has the effect of increasing heart rate.
			A)	True
			B)	False
17			The electrocardiogram tracing is a measurement of the contraction sequences of the heart.
			A)	True
			B)	False
18			Either hyperkalemia or hypokalemia could cause an irregular heart rhythm.
			A)	True
			B)	False
19			An increase in blood calcium or hypercalcemia can cause the heart to increase its pressure and have a prolonged QRS interval.
			A)	True
			B)	False
20			A slow heart rate that is diagnosed as a bradycardia condition always is abnormal and should be treated.
			A)	True
			B)	False
21			The technique called defibrillation is the application of an electric current to the chest wall with the desired effect of directly stabilizing the abnormal heart rhythm.
			A)	True
			B)	False
22			Vasoconstriction of a blood vessel causes an increase in blood pressure.
			A)	True
			B)	False
23			The control of blood flow to a specific area is related to the amount of oxygen present.
			A)	True
			B)	False
24			Normally the hydrostatic pressure of the blood exceeds its osmotic pressure which causes a loss of fluids into the tissue spaces.
			A)	True
			B)	False
25			Ankle edema or ascites is caused by an abnormal increase in blood osmotic pressure.
			A)	True
			B)	False
26			A decrease in stroke volume will cause a drop in blood pressure and a drop in heart rate will also result in a pressure decrease.
			A)	True
			B)	False
27			Starling's law of the heart states that the force of a heart chamber decreases when the chamber is full.
			A)	True
			B)	False
28			The vasomotor center in the medulla regulates blood pressure by altering the diameters of blood vessels throughout the body.
			A)	True
			B)	False
29			Hypertension is related to an increased risk for developing a heart attack, stroke or obesity.
			A)	True
			B)	False
30			Pulmonary edema may be caused by damage to the heart that has weakened the left ventricle.
			A)	True
			B)	False
31			The circle of Willis represents an anastomosis of blood vessels supplying the cranial cavity and brain.
			A)	True
			B)	False
32			Most of the average adult heart lies to the left of the midline.
			A)	True
			B)	False
33			Pericardial fluid is serous and allows the heart to beat without friction in the pericardial sac.
			A)	True
			B)	False
34			The right and left sides of the heart are separated by the interventricular septum.
			A)	True
			B)	False
35			Blood in all veins is relatively low in oxygen.
			A)	True
			B)	False
36			When an atrium is in systole the ventricle is in diastole.
			A)	True
			B)	False