chapter 3 previous quiz review

Which of the following is true? A. the pacemaker of the heart is the sinoatrial node B. bundle branches carry excitation from the SA node to the AV node C. the left atrium and left ventricle act as a syncytium D.all the above

a

Which of the following is TRUE about the heart? A. its apex is just below the diaphragm B. it is. approximately the size of a persons fist C. it is anterior to the sternum D.all the above

B

which of the following is TRUE for red blood cells? A. they develop from progranulocytes in red bone marrow B. each contains millions of hemoglobin molecules C. they have many mitochondria D. all the above

B

Blood moving through the pulmonary veins A. will enter the sinoatrial node B. will enter pulmonary trunk C.will enter left atrium D. B, a, THEN c

C

Which of the following is true for WBC? A. eosinophils are the most common type B.neutrophils protect against disease caused by parasitic worms C. basophils release histamine and heparin D. all the above

C

The systemic veins: A. carry oxygenated blood away from the heart B. carry oxygenated blood towards heart C. carry deoxygenated blood away from heart D. carry deoxygenated blood towards the heart

D

The systemic circuit A. sends deoxygenated blood to lungs B. sends oxygenated blood to body tissue C. brings oxygenated blood to heart D. brings deoxygenated blood to body tissues

b

Which blood type can be given to a person with type B blood? A. A and B B. B and O C. B and AB D. B, AB, and O

b

blood moving through the pulmonary truck __________________. A. will enter the sinoatrial node B.will enter the pulmonary arteries C. will enter the left atrium D. will enter a, then b, then c

b

A molecule of hemoglobin ________. A. is shaped like a biconcave disk packed almost entirely with iron B. contains four glycoprotein units studded with oxygen C. consists of four globin proteins, each bound to a molecule of heme D. can carry up to 120 molecules of oxygen

c

The visceral pericardium of the heart is also called A. myocardium B. parietal pericardium C. epicardium D. endocardium

c

Prothrombin is converted to thrombin during the ________. A. intrinsic pathway B. extrinsic pathway C. common pathway D. formation of the platelet plug

common pathway

When the ventricular walls are contracting, A. all 4 heart valves are open B. all 4 heart valves are closed C. both A-V valves are open and both semilunar valves are closed D. both semilunar valves are open and both A-V valves are closed

d

Which of the followings true about the heart? A. its apex is just above the diaphgram B. approximately size of a persons fist C. it is posterior to sternum D. all the above

d

mitral valve prolapse is a disorder of the heart in which the mitral valve? A. missing as a result of aboard development B. has an extra cusp C. bulges into the aorta during ventricular relaxation D. bulges into the left atrium during ventricular contaction

d