Term
|
Definition
artery away from heart
vein to heart |
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Term
|
Definition
| passage of blood or fluid through a vascular bed |
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Term
| parallel vs series vascular beds |
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Definition
| be able to locate and 3 advantages?? |
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Term
|
Definition
superior/inferior vena cava
right atrium
tricuspid atrioventricular valve
chordae tendinae
papillary muscles
right ventricle
pulmonary semilunar valve
r and l pulmonary arteries
r and l pulmonary veins
left atrium
biscupid AV valve
l ventricle
aorta |
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Term
|
Definition
endocardium
myocardium
ectocardium
pericardial fluid/space and pericardium
(secretory lining and outer fibrous covering) function to decrease friction due to beating heart |
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Term
|
Definition
| interatrial and interventricular septums |
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Term
| heart valves purpose and pressure |
|
Definition
purpose: to promote a one way direction of blood flow
pressure gradients induce opening nad closing |
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Term
|
Definition
sliding filaments
atp power
elevated Ca++ triggers contraction |
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Term
| cardiac similar to skeletal -5 |
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Definition
has sarcomeres
is striated
has troponin
t tubules
sr ca++ |
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Term
| cardiac is similar to smooth muscles-4 |
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Definition
has pacemaker cells
gap junctions (syncytium)
Ca++ entry from outside
autonomic/hormones modulate |
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Term
| DHPR and gain function in EC coupling |
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Definition
DHPR=Functional Ca++ receptor for Ca induced Ca release,
Gain function of 1:10
1 in from ECF and 10 out of SR. |
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Term
NCX- Role
And after Digitalis application? |
|
Definition
NCX is a 3 Na/ 1 Ca exchange that restores ca++ to the SR myoplasm in "forward exchange" Relies on ATP for forward exchange
DIGITALIS blocks ATP. therefore Na accumulates and Ca goes INTO the cell (reverse) |
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Term
|
Definition
| autorhythmic and determine HR |
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Term
cells responsible for rapidly spreading electrical stimulus throughout chambers.
FUNCTIONAL ROLE IN NORMAL HEARTBEAT |
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Definition
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|
Term
99% of cells in heart.
MAIN ACTIVITY DETERMINES STROKE VOLUME |
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Definition
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|
Term
Conduction System Heartbeat coordination connections
SA Node
AV node
Bundle of His/purkinje;ventricle |
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Definition
connected via gap junctions
TRUE PACEMAKER GETS TO THRESHOLD FIRST
DELAYS SIGNAL, AP PROPAGATION IS SLOW
AP PROPAGATION IS FAST |
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Term
|
Definition
ONLY EXPECTED ELECTRICAL CONNECTION BETWEEN ATRIA AND VENTRICLE
SLOW AP PROPAGATION BECAUSE OF CHAINS OF CELLS AND ION CHANNEL DENSITY |
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Term
PATH OF ELECTRICAL FLOW (CONDUCTION0
1-7 |
|
Definition
SA NODE
ATRIAL MUSCLE CELLS
AV NODE
BUNDLE OF HIS- CONDUCTING CELLS
BUNDLE BRANCHES - CONDUCTING CELLS
PURKINJE FIBERS- CONDUCTING CELLS
VENTRICULAR MUSCLE CELLS |
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