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EZ-Anat Ch. 15

Barron's E-Z Anatomy and Physiology Chapter 15 review

The heart is enclosed within an area of the thorax known as the: mediastinum
The double sac membrane that covers the heart is the: pericardium
The heart has three layers of tissue; the middle and thickest layer is called the: myocardium
The layer of the heart tissue lining the heart chambers and covering valve tissue is the: endocardium
The heart chambers are separated longitudinally by a body of tissue known as the: cardiac septum
The blood receiving chambers of the heart are the: atria
The pumping chambers of the heart are the: ventricles
Blood returns to the heart from the lungs by means of the: pulmonary veins
The large artery carrying blood to the body from the left ventricle of the heart is the: aorta
Those blood vessels that carry blood away from the heart are: arteries
Those blood vessels that carry blood toward the heart are: veins
On the right side of the heart, the valve between the right atrium and right ventricle is the: tricuspid valve
The valves leading to the pulmonary trunk and aorta are both referred to as the: semilunar valves
Arteries supplying blood to the tissue of the heart are the: coronary arteries
A blockage in vessels supplying heart muscle may cause a(n): myocardial infarction
Because the sinoatrial node sets the pace for the autorhythmic cardiac muscle activity of the heart, it is commonly known as the: pacemaker
The specialized cardiac muscle fibers in the interventricular septum, which distribute nerve impulses to tissues of the ventricles, are the: Purkinje fibers
The QRS wave of an EKG represents the electrical activity of: ventricles contracting
The autorhythmic activity of the heart can be modified by a branch of the nervous system known as the: autonomic nervous system
Heart contraction is known by the alternate term of: systole
Relaxation periods of the heart when contractions are not occurring are known as: diastole
The heart normally beats each minute approximately: 70-75 times
Unusual heart sounds, such as those emitted by poorly functioning valves, are called: heart murmurs
The smallest vessels, which carry blood to the cells of the tissues are the: capillaries
An artery's lumen may be narrowed by: vasoconstriction
Dilated veins with pooled blood cause a condition known as: varicose veins
The pressure of the blood can be measured by an instrument known as a(n): sphygmomanometer
A typical blood pressure reading contains two numbers of which the first number is the systolic pressure and the second number is the: diastolic pressure
A rapid pulse reflects a rapid heart rate and a condition called: tachycardia
A slow pulse reflects a slow heart rate and a condition called: bradycardia
The regulatory center of the brain that maintains the flow of blood is a cluster of sympathetic neurons known as the: vasomotor center
Insufficient oxygen and nutrients delivered to the body cells may induce a condition known as: shock
The only artery of the body that carries oxygen-poor blood is the: pulmonary artery
The only vein of the body that carries oxygen-rich blood is the: pulmonary vein
The pattern of blood vessels within the brain is known as the: circle of willis
Created by: alhobonoah



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