Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
|
efferent vs. afferent?
|
arteries vs. veins
|
|
|
sac surrounding heart?
|
pericardial cavity
|
|
|
inflamation of pericardial cavity?
|
pericarditis
|
|
|
when left ventricle contracts...(2)
|
1.base-apex distance decreases
2.ventricular chamber diameter decreases |
|
|
backflow of blood into atria?
|
regurgitation
|
|
|
systole?
diastole? |
blood pushed out
blood fills up |
|
|
pre-start condition
|
chambers relaxed; ventricles filled passively;
|
|
|
end diastolic volume (EDV)
|
blood in ventricle at start of contraction
|
|
|
Ends systolic volume (ESV)
|
blood in ventricle after contraction
|
|
|
stroke volume
|
blood pumped out by ventricle
|
|
|
ejection fraction
|
% EDV pumped out
|
|
|
Cardiac output
formula? factors affecting? (3) |
blood pumped by each ventricle per minute
=heart rate x stroke volume 1.autonomic control 2. hormones 3. EDV and ESV |
|
|
2 cells involved in heartbeat?
|
1. cells of conducting system
2. contractile cells |
|
|
prepotential?
|
gradual depolarization of membrane
|
|
|
brachycardia
|
slow heart rate
|
|
|
tachycardia
|
faster heart rate
|
|
|
P wave (represents?
|
depolarization of atria
|
|
|
QRS complex (represents?)
|
depolarization of ventricles
|
|
|
T wave (represents?)
|
ventricular repolarization
|
|
|
cardiac cycle
|
start of heartbeat to beginning of next (includes systole and diastole)
|
|
|
isovolumetric contraction
|
valves closed, ventricle relaxing, blood does not flow into ventricles.
|
|
|
ventricular ejection
|
pressure in ventricles higher than in arterial trunks
|
|
|
isometric relaxation
|
valves closed, ventricle relzxes, blood doesnt flow into ventricles
|
|
|
resistance is ..... proportional to vessel radius
RESISTANCE= |
inversely
1/RADIUS^4 |
