BYU PdBio 305 Rhees Cardiac Physiology
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
---|---|---|---|---|---|
Endocardium | show 🗑
|
||||
show | muscle layer (cardiac muscle)
🗑
|
||||
show | thin external layer covering the heart
🗑
|
||||
show | SA node or pacemaker;located within the posterior wall of the right atrium; rhythmic impulses originate in the SA node and spread through the atria
🗑
|
||||
show | AV node; located within the lower right interatrial septum; an impulse is delayed there for about 1/10 of a second to allow the atria to contract before ventricular contraction
🗑
|
||||
Atrioventricular bundle | show 🗑
|
||||
Purkinje fibers | show 🗑
|
||||
Factors that may alter the heartbeat rate | show 🗑
|
||||
show | the phase of contraction
🗑
|
||||
show | the phase of relaxation
🗑
|
||||
4 steps of cardiac cycle | show 🗑
|
||||
mid-diastole | show 🗑
|
||||
show | atria contract ad pump the additional 20-30% of the blood into the ventricles. As the atria contract, the vena cava and pulmonary veins narrow; there is some regurgitation. There is about 135 ml of blood in each ventricle.
🗑
|
||||
ventricular systole | show 🗑
|
||||
Isovolumetric ventricular contraction phase | show 🗑
|
||||
Stroke volume | show 🗑
|
||||
show | Amount of blood remaining in either ventricle at the end of systole, about 60ml
🗑
|
||||
Early diastole | show 🗑
|
||||
Pulse pressure | show 🗑
|
||||
factors that increase heart rate | show 🗑
|
||||
show | less than 60 beats/min-sleep, endurance athletes.
🗑
|
||||
tachycardia | show 🗑
|
||||
show | expiration, fear, grief
🗑
|
||||
inotropic | show 🗑
|
||||
franks starling's law of the heart | show 🗑
|
||||
show | epinephrine and norepinephrin
🗑
|
||||
digitalis | show 🗑
|
||||
factors that have a positive inotropic effect | show 🗑
|
||||
show | rate of contraction- Positive is anything speeding heart rate and Negative is anything slowing heart rate down
🗑
|
||||
show | chronotropic and inotropic
🗑
|
||||
show | increase rate and force of contraction, uses norepinephrine to increase permeability to Na and Ca
🗑
|
||||
show | decrease rate and force of contraction, S.A node-right vagus, A.V. node- left vagus, uses acetylcholine to increase permeability to K+
🗑
|
||||
show | Preload, contractility, and afterload. Increase preload or contractility = increase SV. Increased afterload = decreased SV
🗑
|
||||
cardiac output | show 🗑
|
||||
show | axiety, eating, exercies, increased body temperture, pregnancy
🗑
|
||||
show | sympathetic/parasympathetic impulses, hormones, body temperature, exercise, drugs, emotions, stimulation from exteroceptors
🗑
|
||||
show | deviations from normal heart rate or from normal electrical activity of the conduction system
🗑
|
||||
show | many ectopic pacemakers in atria; irregular p waves; decrease in cardiac output; QRST look normal
🗑
|
||||
show | caused by many ventricular ectopic pacemakers, uncoordinated, chaotic twitching, blood pressure drops, unless stopped, death will occur in short time
🗑
|
||||
myocardial infarction | show 🗑
|
||||
symptoms of myocardial infarction | show 🗑
|
||||
show | Right/left pulmonary veins
🗑
|
||||
What vessel sends deoxygenated blood to lungs from the heart | show 🗑
|
||||
What vessels sends deoxygenated blood to right atrium from the body | show 🗑
|
||||
Left ventricle | show 🗑
|
||||
What vessels send oxygenated blood to the rest of the body from the heart | show 🗑
|
||||
show | Revieves oxygenated blood from lungs. 4 pulmonary veins, Pumps blood to left ventricle from mitral/bicuspid valve (left AV)
🗑
|
||||
Right atrium | show 🗑
|
||||
show | Pumps deoxy blood through pulmonary semilunar valve to the lungs to become oxygenated (via pulmonary trunk)
🗑
|
||||
What does the Q-T interval represent | show 🗑
|
||||
What does the QRS complex represent | show 🗑
|
||||
P wave | show 🗑
|
||||
show | Ventricular repolarization
🗑
|
||||
show | Electrical depolarization and repolarization of the atrium
🗑
|
||||
Cardiac cycle | show 🗑
|
||||
What happens when you have Congestive Heart Failure on the right side of the heart | show 🗑
|
||||
show | Right side (pulmonary circuit) is pumping more blood to lungs causing fluid to fill the lungs
🗑
|
||||
show | Ventricles repolarize/relax, semi-lunar valves close, AV valves remain closed, 2nd heart sound occurs (dupp), T wave in ECG, no change in volume
🗑
|
||||
Coronary circulation | show 🗑
|
||||
Anastomoses in coronary circulation | show 🗑
|
||||
What causes constant and rapid action potentials/brief depolarization in cardiac muscle vs AP in neurons | show 🗑
|
||||
What is cardiac muscle's resting membrane potential vs. neuron's | show 🗑
|
||||
show | Slow Ca2+ channels open and let Ca2+ into cell while K+ channels close. Also called "absolute refractory period." 250msec long (only 1msec in neurons.)
🗑
|
||||
What happens to the heart during the plateau phase | show 🗑
|
||||
What happens during the repolarization of the AP in cardiac muscle | show 🗑
|
||||
show | Volume in ventricle at the end of the diastole, about 130ml
🗑
|
||||
show | Ventricle filling (atrial systole), isovolumetric contraction, ventricular ejection, isovolumetric relaxation
🗑
|
||||
show | The AV valves open
🗑
|
||||
show | Ach releases from Vagus nerve onto SA node causing K+ channels to open. So you have K+ and Na2+ leaking in at the same time causing it to take longer to get to threshold =slower heart rate
🗑
|
||||
Norepinephrine with the sympathetic NS and heart rate | show 🗑
|
||||
show | 1. SA node sets rate of depolar. & generates impulses for contraction, 2. Impulse pauses at AV node to let atria finish contracting, 3. Impulse passes through bundle of his, R/L bundle branches, and perkinje fibers, 4. Ventricular depolar. complete
🗑
|
||||
show | Regular, spontaneous depolarization from SA node
🗑
|
||||
Automaticity of cardiac muscle | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Created by:
droid
Popular Physiology sets