ch. 13 Homework

What is the innermost layer of an artery wall called?

endothelium

This flow diagram illustrates the effects of an increased cardiac output and the role of baroreceptors in controlling changes in blood pressure. Place the labels in the correct location based on the hints provided.

1. Cardiac output increases 2. blood pressure rises 3. baroreceptors in aortic arch and carotid sinuses are stimulated 4. Sensory impulses to cardiac center 5. Parasympathetic impulses to heart 6. SA node inhibited 7. Heart rate decreases 8. Blood pressure returns to normal

Label the waves, or deflections, seen in the normal ECG pattern.

1. P wave 2. QRS wave 3. T wave

1. The heart is located in the BLANK 2. The heart is situated between the BLANK on either side, in front of the BLANK , and behind the BLANK. 3. The BLANK of the heart, which is more superior, is the point of attachment for the major vessels. 4. The BLANK of the heart points inferiorly and to the left, and sits at the level of the BLANK intercostal space.

1. Thoracic activity 2. lungs, vertebral column, sternum 3. base 4. apex, fifth

Place the following structures in order through which the blood flows.

1. right atrium 2. right ventricle 3. pulmonary artery 4. lungs 5. pulmonary veins 6. left atrium 7. left ventricle 8. aorta

1. The tricuspid valve, associated with the BLANK ventricle, and the bicuspid valve, associated with the BLANK ventricle, are also called BLANK 2. Attached to these valves are fibrous strings called BLANK, which in turn are attached to the BLANK. 3. The papillary muscles BLANK with the ventricles, which makes the chordae tendineae BLANK. 4. As a result, the chordae tendineae BLANK

1. right, left, atrioventricular valves 2.chordae tendineae, papillary muscles 3. contract, taut 4. prevent the valves from opening into the atrium.

1. pericardium 2. fibrous pericardium 3. parietal pericardium

Covering of the hearts

The ventricles and atria can be in systole at the same time.

False

What is the sequence of travel by an impulse through the cardiac conduction system?

sinoatrial node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers

1. epicardium 2. myocardium 3. endocardium

wall of the heart