Look at me!
I am a ____ image. Name the heart structures that are visible on my borders.
What is a CT?
SVC border, RA, Aortic Arch, LV
I pump out three of these for every two of these I pump in.
I am most concentrated ion in the cell.
What is K+?
In general high concentrations of ions will lead to ____ frequent depolarization and present as muscle _____ in patients.
What is more and spasm?
The exception is Ca+ which has the opposite effect because it regulates opening of the Na+ Voltage Channel.
I am in the SA/AV node. I let in this ion and I am the reason your heart doesn't stop beating.
What is sodium and If?
I am a ____ image.
The structures shown by the green, pink and blue asterisk.
What is an MR?
Blue - Ascending Aorta
Pink - Aortic Valve
Green - LV
The only pump maintaining RMP.
What is a Na+/K+ pump?
As a result of the concentration gradient I have a tendency to flow this direction.
What is OUT?
The concentration gradient pushes K+ to flow OUT of the cell because it is already at a HIGH concentration inside from the Na+/K+ pump.
In general low concentrations of ions will lead to ____ frequent depolarization and present as muscle _____ in patients.
What is less and weakness?
The exception is Ca+ which has the opposite effect because it regulates opening of the Na+ Voltage Channel.
I am the reason for the platwo during the action potential in cardiac myocytes.
What is IL release of Ca+ into the cell?
Identify the four chambers.
1. RA
2. LA
3. RV
4. LV
This channel opens in response to a stimulus and begins to make the inside of the cell more positive.
What is Inat?
As a result of the electrical gradient I have a tendency to flow in this direction.
What is OUT?
As a result of K + flowing out from the concentration gradient, there is a buildup of negative charge inside, which eventually lead to more K + flowing in.
This ion leads to random opening of the Inat channel.
What is Ca+?
In your pacemaker cells found in the SA/AV nodes, these two channels lead to slow depolarization.
What are IL and IT?
In a three chamber view, the structures indicated by the two white circles.
What are the Aortic and Mitral valves?
During hyper polarization this channel brings us back up to RMP.
What is the K+ leak channel?
This electrolyte imbalance means cells cannot repolarize due to a small efflux of this ion.
What is hyperkalemia and K+?
There is too much K+ in the cell and not enough is leaving.
Which channel leads to the fast depolarization of myocytes?
What is Inat?
Why am I reviewing?
To pass ---- You got this :)
This channel leads to repolarization however, is rather slow in doing so.
What is Ik?
RMP for cardiac myocytes is at approximately this voltage.
**BONUS Why?
What is -85 mV?
There is higher solubility of K+ in cardiac cells thus the K+ gradient is stronger.
What is hyponatremia and Na+?
Hyperkalemia will _____ the membrane potential of the heart.
This can lead to deadly arrhythmias in patients.