Physiology to Remember Flashcards
S1
- isovolumetric contraction
- closure of mitral and tricuspid valves
S2
- isovolumetric relaxation
- closure of aortic and pulmonic valves
P wave
- atrial depolarization
- the wave of depolarization that spreads from the SA node throughout the atria
P-R interval
- period of time from the onset of the P wave to the beginning of the QRS complex
- represents the time between the onset of atrial depolarization and the onset of ventricular depolarization
What does it mean if the P-R interval is greater than .20 seconds?
AV conduction block = first degree heart block
QRS
- ventricular depolarization
ST segment
- the isoelectric period following the QRS and ending at the beginning of the T wave
- this is the time at which both ventricles become completely depolarized
- plateau phase
- important with diagnosis of ischemia or hypoxia
T waves
- ventricular repolarization
U wave
- sometimes following the T wave
- the last remnants of ventricular repolarization
Q-T interval
- represents the time for both ventricular depolarization and repolarization to occur
Meissners corpuscle
Light touch
Pacinian corpuscle
Vibration
Ruffini endings
Constant touch/pressure
Meckels disc
Pressure/texture
How does insulin effect amino acids and protein synthesis?
It improvise AA uptake and protein synthesis
How does cortisone affect amino acids?
Releases amino acids from muscle tissue
CN 1
Olfactory — senses smell
CN 7
Facial nerve — chorda tympani
- mediates taste to the anterior 2/3 of the tongue and soft palate
CN 8
Vestibulocochlear nerve responsible for hearing and balance
CN 9
Glossopharyngeal nerve meditates taste to the posterior 1/3 of the tongue
CN 10
Vagus nerves, mediates taste from the upper esophagus and epiglottis
