Anatomy review quiz 3
In a ECG pattern, the T wave is caused by
depolarization of ventricular muscle fibers
A molecule of hemoglobin A. Consist of 4 globulin proteins: each bond to a molecule heme B.contains 4 glycoprotein unit studded with oxygen C. is shaped like a biconcave disk packed with almost entirely iron D. can carry up to 120 molecules of O2
A
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 AV node C. the left atrium and left ventricle act as a syncytium D. all above
a
true about the heart? A. apex is just above the diaphragm B. approximately size of fist C. posterior to sternum D.all
all
Which of the following is true about RBC? A. they develop from progranulocytes in red blood marrow B. each contain millions of hemoglobin molecules C. they have many mitochondria D. all above
b
blood moving towards the pulmonary trunk A. will enter the sinoatrial node B. will enter the pulmonary arteries C. will enter the left atrium D. A then B then C
b
pulmonary circuit
brings oxygenated blood from lungs to the heart
Prothrombin is converted to thrombin during the ________. A. intrinsic pathway B. extrinsic pathway C. common pathway D. formation of the platelet plug
c
Which of the following is true for WBC? A. eosinophils are the most common B. neutrophils protect against disease caused by parasitic worms C.basophils release histamine and heparin D. all above
c
The systemic veins: A. carry oxygenated blood away from heart B. carry oxygenated blood towards heart C. carry deoxygenated blood away from heart D. carry deoxygenated blood towards heart
d
When the ventricular walls 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
what happens during atrial diastole?
the atria relax
The first heart sound (S1) or lubb occurs during
ventricular systole
