Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Physiology
Cardiovascular
| Concept | Definition |
|---|---|
| blood | a type of specialized connective tissue that flows through blood vessels |
| leukocytes | WBC |
| Thrombocytes | Platelets |
| Erythrocytes | RBC |
| (T/F) When anticoagulent is used the clotting factors stay suspended in plasma | True |
| (T/F) when anticoagulent is not used, the clotting factors get used up leaving serum | True |
| Serum | plasma without clotting factors |
| Blood Consists of | cells and fluid (serum, plasma) nutrients, electrolytes, antibodies, hormones, O2, & CO2 |
| pulmonary circulation | begins at the pulmonary valve and extends to the orifice of left atrium |
| Intercalated discs | interlocking borders that separate individual cardiac cells filled with gap junctions for fast ion flow |
| Cardiac syncytium | interconnected network of heart muscle cells |
| Diastole | heart relaxes and ventricles fill up |
| Systole | heart contracts and ventricles eject |
| (T/F) The left ventricle builds more pressure than right ventricle during cardiac cycle | True |
| Stroke volume | volume of blood ejected during each beat |
| Cardiac output | the total blood volume ejected by each ventricle in one minute |
| Cardiac output formula | SV * HR |
| Pulse pressure | difference between Systolic and Diastolic pressures |
| Cardiac events lead to | pressure changes in the cardiovascular system and is greater during systole |
| Factors that affect pulse pressure | Stroke volume output of the heart and compliance (total distensibility) of the arterial tree |
| The contraction of a cardiac muscle cell occurs... | after an action potential (AP) |
| The AP is initiated spontaneously in the heart by... | pacemaker cells |
| The AP is propagated throughout the heart by way of... | the conducting system and gap junctions |
| (T/F) Most cardiac muscle cells do not remain stable at a resting membrane potential | False |
| (T/F) Cells of SA node, AV node and conducting pathways depolarize spontaneously toward the threshold & form AP that will spread to muscle cells hence causing depolarization and contraction in the muscles | True |
| pacemaker cells | Cardiac cells that depolarize spontaneously toward threshold |
| primary pacemaker | The SA node |
| electrocardiogram (ECG) machine | a highly sensitive voltmeter that helps us monitor cardiac action potentials from the surface of the body |
| P wave | atrial depolarization |
| PR segment | AV nodal delay |
| QRS complex | ventricular depolarization (atria repolarizing simultaneously) |
| ST segment | Time during which ventricles are contracting and emptying |
| T wave | ventricular repolarization |
| TP interval | time during which ventricles are relaxing and refilling |
| Information gathered from ECG | Heart Rate, type of rhythm, A-V Conduction Defects, & Chamber enlargement |
| Dropped QRS | Second degree AV conduction block |
| Sinus bradycardia | a heart rhythm where the heart's natural/primary pacemaker fires electrical signals at a slower rate than normal |
| Sinus tachycardia | a condition where the heart's natural pacemaker (the SA node) sends electrical signals too quickly |
Created by:
satya.benoit