Veins a. carry blood away from the heartb. carry blood under very high pressurec. may contain valves and are lined with endothelium d. are described as strong, rigid vessels that always carry oxygenated blood e. have thick, many layered walls Veins that return blood directly to the heart include the a. brachiocephalic veinb. superior vena […]
Identify structure “A” on the heart diagram. a. left atrium b. aortic semilunar valve c. bicuspid (mitral) valve d. right atrium e. pulmonary semilunar valve Systemic blood vessels transport blood a. from the left ventricle through the body to the left atriumb. from the left ventricle through the body to the right atriumc. from the […]
Which of the following is mismatched? a. opening of sodium fast channels – depolarizationb. closing of calcium slow channels – plateau phasec. opening of potassium channels – rapid repolarization d. closure of sodium channels – early repolarization e. opening of calcium slow channels – plateau phase 8. Turbulence of blood flow through the aortic valve […]
The heart a. is a four-chambered muscular pump b. is posterior to the trachea c. is lined with an epithelial layer called epicardium d. lies mostly to the right of the midline of the sternum e. has a superior apex and an inferior base Blood in the superior vena cava will enter the _____. a. […]