Read each questions carefully. Write your answers at the reply box below. 1. The coronary arteries arise from the : a. Aorta near the origin of the left ventricle b. Pulmonary artery at the apex of the right ventricle c. Pulmonary vein near the left atrium d. Superior vena cava at
Read each questions carefully. Write your answers at the reply box below.
1. The coronary arteries arise from the :
a. Aorta near the origin of the left ventricle
b. Pulmonary artery at the apex of the right ventricle
c. Pulmonary vein near the left atrium
d. Superior vena cava at the origin of the right atrium.
2. The pacemaker for the entire myocardium is the: _____
a. Atrioventricular junction c. Purkinje fibers
b. Bundle of His d. Sinoatrial nodes
3. So that blood may flow from the right ventricle to the pulmonary artery, which of the following conditions is NOT required?
a. The Atrioventricular valves must be closed
b. The pulmonic valve must be open
c. Right ventricular pressure must be less than pulmonary atrial pressure.
d. Right ventricular pressure must rise with systole.
4. Heart rate is stimulated by all of the following except:
a. Excess thyroid hormone
b. Increase levels of circulating catecholamines
c. Sympathetic nervous system
d. Vagus nerve
5. The first heart sound is generated by:
a. closure of the aortic valve
b. closure of the atrioventricular valves
c. opening of the atrioventricular valves
d. opening of the pulmonic valves
6. The transport system of the body responsible for carrying oxygen and nutrients to the body and carrying away carbon dioxide and other wastes
a. Respiratory System
b. Cardiovascular System
c. Musculoskeletal System
d. Neurovascular System
7. The outermost layer of the heart wall, or visceral layer of serous pericardium
a. Endocardium
b. Epicardium
c. Myocardium
8 - 9. The unoxygenated blood that enters the Superior and Inferior vena cava flows to the right atrium, then goes to the _______________ via the tricuspid valve, and enters the pulmonary artery via the _________________ valve.
a. Mitral valve
b. Left atrium
c. Right ventricle
d. Pulmonary valve
e. Left ventricle
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