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Mastery Test
Ch.13 Cardiovascular System
| Question | Answer |
|---|---|
| Visceral Pericardium is also known as ___________________. | Epicardium |
| Three layers of the heart ____________, ____________, ____________. | Epicardium, Myocardium, Endocardium |
| Upper & lower heart chambers | upper-atria, lower-ventricles |
| Vessels that empty into upper right chamber of heart are ______________. | Superior & inferior venae cavae and Coronary Sinus |
| Valve between the chambers of the left side of the heart is _____________. | bicuspid (mitral) valve |
| Strong fibrous strings attached to the cuops of the tricuspid and bicuspid valved and the papillary muscle are the ________________. | chordac tendineac |
| Atrial contraction, while the ventricles relax, followed by ventricular contraction, while the atria relax, is known as the _________________ __________________. | Cardiac Cycle |
| A mass of merging cells that function as a unit is called ____________. | functional syncytium |
| The cells that initiate the stimulus for contraction of the heart muscle are located in the ____________ ____________. | Sinoatrial Node |
| A recording of the electrical changes that occur in the myocardium during the cardiac cycle is a ___________. | Electrocardiogram EKG |
| In the EKG, atrial contraction is represented by the _______. | P wave |
| The effect of an increase of parasympathetic nerve impulses on the heart is to increase or decrease the heart rate? | decrease |
| Abnormalities in the concentration of the ___________ and __________ ions is likely to interfere with contraction of the heart | Potassium and Calcium |
| When the smooth muscles of the artery contracts, the action is called _____________________. | Vasoconstriction |
| Fatty materials, particularly cholesterol, form deposits called ___________ on the innter walls of the arteries when the condition ______________ occurs. | plaque, atherosclerosis |
| The vessel that participates directly in the exchange of substances between the cell and the blood is the _____________. | capillary |
| The amount of blood that flows into capillaries is regulated by ____________ ______________. | precapillary sphincters |
| The transport mechanisms used by the capillaries are __________, ______________ and ________________. | Diffusion, osmosis, filtration |
| blood pressure is highest in ______________. | an artery |
| plasma proteins help retain water in the blood by maintaining __________ _____________. | osmotic pressure |
| The middle layer of the walls of veins differs from that of the arteries in that it contains ______________. | less smooth muscle |
| blood in veins is kept flowing in one direction by the presence of ______________________. | valves |
| The maximum pressure in the artery, occurring during ventricular contraction, is ____________________. | Systolic pressure |
| The amount of blood pushed out of the ventricle with each contraction is called _______________. | stroke volume |
| Four factors that influence blood pressure | blood volume, heart action, viscosity (fluid thickness), peripheral resistance |
| Peripheral resistance is maintained by increasing or decreasing the size of _______________. | arterioles |
| Which vessel carries deoxygenated blood? | pulmonary artery |
| The pulmonary veins enter the ________________. | left atrium |
Created by:
n2biology
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