Term
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Definition
| The action potential of these cells is marked by a plateau or flattened phase |
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Term
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Definition
| Only 1% of the myocardial cells are this type. |
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Term
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Definition
| The make-up of these myocardial cells resembles that of skeletal muscle cells because they are packed with contractile proteins. |
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Term
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Definition
| The muscle cells of the heart are called ___ cells. |
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Term
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Definition
| These muscle cells are found the in wall of blood vessels. |
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Term
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Definition
| The opening of If channels is the starting point for generating an action potential in these cells |
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Term
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Definition
| These cells are also referred to as autorhythmic or pacemaker cells. |
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Term
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Definition
| The resting membrane potential of these cells is about -90 mV. |
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Term
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Definition
| These cells make up the electrical conduction system of the heart. |
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Term
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Definition
| These fine fibers of specialized myocardial cells direct the action potential through the largest area of the ventricle walls. |
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Term
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Definition
| As the name suggests, the fibers of this segment of the electrical conduction pathway are designed to spread the action potential across the right and left atria. |
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Term
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Definition
| In order to affect heart rate, the neurons of the autonomic nervous system release neurotransmitter to the cells of this structure. |
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Term
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Definition
| After the Bundle of His, the electrical conduction pathway splits into the right and left: |
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Term
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Definition
| The depolarization wave through the electrical conduction system is temporarily delayed at this step |
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Term
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Definition
| This segment of the electrical conduction system directs the action potential into the septum between the ventricles. |
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Term
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Definition
| The collection of blood vessels that direct the blood to, through, and back from the body tissues is called the ____ circuit. |
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Term
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Definition
| The strongest wall of the heart can be found at the ___ ventricle because it has to pump the blood the furthest. |
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Term
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Definition
| Increasing total blood volume will ___ blood pressure. |
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Term
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Definition
| Deoxygenated blood can be found in this side of the heart. |
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Term
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Definition
| Dilation of arterioles will lead to a/an ___ in blood pressure |
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Term
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Definition
| Blood moves through the blood vessels from a place of higher to lower pressure, indicating that flow will only occur when there is a pressure ___. |
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Term
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Definition
| The collection of blood vessels directing blood into, through and out of the lungs is called the ____ circui |
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Term
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Definition
| Increasing cardiac output will ___ blood pressure. |
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Term
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Definition
| The contraction phase of the cardiac cycle |
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Term
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Definition
| The number of cardiac cycles per minute |
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Term
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Definition
| The resting/filling phase of the cardiac cycle. |
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Term
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Definition
| The amount of blood in the entire circulatory system. |
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Term
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Definition
| The process of getting the blood back to the heart after it has passed through the tissues. |
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Term
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Definition
| Heart rate x stroke volume = |
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Term
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Definition
| One complete series of events in the heart that includes the alternating contraction/filling phases of the atria and ventricles |
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Term
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Definition
| The volume of blood in the left ventricle when it has finished filling |
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Term
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Definition
| The narrowing of the diameter of arteries and arterioles |
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Term
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Definition
| The resistance the blood faces as it leaves the left ventricle and enters the aorta. |
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Term
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Definition
| The volume of blood pumped out of the heart per minute. |
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Term
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Definition
| The enlargement of the diameter of the arteries and arterioles. |
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Term
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Definition
| The opposition to blood flow in the arteries and arterioles. |
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Term
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Definition
| The percentage or ratio of the volume of blood that leaves the left ventricle during a contraction. |
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Term
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Definition
| The volume of blood remaining in the left ventricle at the end of its contraction. |
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Term
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Definition
| The volume of blood pumped out of the heart per contraction |
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