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EZ-Anat Ch. 15
Barron's E-Z Anatomy and Physiology Chapter 15 review
Question | Answer |
---|---|
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 |