click below
click below
Normal Size Small Size show me how
HW/ ch 19
Anatomy and Physiology = Bio 2020; CH 19
Term | Definition |
---|---|
Oxygen-poor blood enters which chamber of the heart? | Right atrium |
The right atrioventricular valve is also called the | Tricuspid valve |
The only arteries in the body that carry oxygen-poor blood are the coronary arteries. | False |
Left ventricular contraction propels blood through which valve? | Aortic valve |
How many pulmonary veins are there? | Four |
The right atrioventricular valve is also called the | tricuspid valve |
The only arteries in the body that carry oxygen-poor blood are the coronary arteries. | False |
Left ventricular contraction propels blood through which valve? | Aortic valve |
Which of the following is not true for ventricular systole? | The ventricles relax |
The ventricles begin to fill during ventricular diastole. | True |
The semilunar valves close during | ventricular diastole |
The atrioventricular valves open during | ventricular diastole |
The ventricles begin to fill during ventricular diastole. | True |
Atrial contraction accounts for most of the ventricular filling. | False |
Which of the following is not true for ventricular systole? | The ventricles relax |
The ventricles begin to fill during ventricular diastole. | True. |
During which event of the cardiac cycle does aortic pressure reach its maximum? | Ventricular ejection |
During which event of the cardiac cycle do the atria both relax and contract? | Ventricular filling |
During which event of the cardiac cycle do both the atria and ventricles relax? | Isovolumetric relaxation |
The audible heart sounds are caused by the contraction of the atria and ventricles. | False |
Pulmonary arteries carry highly oxygenated blood. | False |
Which of the following is the region of the thoracic cavity where the heart is located? | Mediastinum |
Function of pericardium | Aid the heart in the strength of contractions |
The external layer of the heart wall is the | epicardium |
In the right atrium, the auricle and anterior wall exhibit obvious muscular ridges called | pectinate muscles |
Characteristics of cardiac muscle | Cells are long and cylindrical; Cells have multiple nuclei at the periphery of the cell |
The cells of the ___________ act as the heart's pacemaker, which establishes the pace for cardiac activity. | sinoatrial (SA) node |
Check all that occur during ventricular systole |