| Statement I: | The contraction of both atria delivers about 80% of the total volume of blood to the ventricles for subsequent ejection. |
| Statement II: | Normally, both atria contract at the same time, followed shortly by both ventricles contracting at the same time. |
| Statement I: | A muscular wall called a septum prevents the mixture of blood between the left and right sides of the heart. |
| Statement II: | The left ventricle has a thicker musculature when compared to the musculature of the right ventricle. |
| 1. | Statement I is correct: Statement II is incorrect |
| 2. | Statement I is incorrect: Statement II is correct |
| 3. | Statement I is correct: Statement II is correct |
| 4. | Statement I is incorrect: Statement II is incorrect |
| Statement I: | People who are blood type O have both anti-A and anti-B antibodies present in their plasma. |
| Statement II: | People who are blood type AB do not produce either anti-A or anti-B antibodies. |
| I: | pulmonary arteries carry oxygen-poor blood |
| II: | pulmonary veins carry blood towards the lung capillaries |
| III: | blood returning to the left atrium of the heart is oxygen-poor |
| IV: | oxygen from the blood diffuses into the air sacs (alveoli) of the lungs |
| I: | Basophil |
| II: | Eosinophil |
| III: | Lymphocyte |
| IV: | Monocyte |
| 1. | will not be able to make white blood cells |
| 2. | will not be able to make red blood cells |
| 3. | will have a reduced ability to prevent blood loss |
| 4. | will not be able to defend against bacteria |
| 1. | SA node, AV bundle, AV node, Purkinje fibers |
| 2. | SA node, AV node, AV bundle, Purkinje fibers |
| 3. | AV node, AV bundle, SA node, Purkinje fibers |
| 4. | AV node, SA node, Purkinje fibers, AV bundle |
| 1. | The ventricles are also in systole. |
| 2. | The atrioventricular valves are closed. |
| 3. | Blood is being pumped into the aorta and pulmonary trunk. |
| 4. | Blood is being pumped into the ventricles. |
| 1. | P wave | 2. | QRS complex |
| 3. | ST segment | 4. | T wave |