Phys. Facts Flashcards
Boyle’s law
At constant temperature, gas volume is inverse to pressure
Charles Law
At constant pressure, gas volume is proportional to absolute temperature
Chronaxie Law
Minimum interval of time necessary to electrically stimulate a muscle or nerve fiber using twice the minimum current to elicit threshold response
Goldman Law
Membrane potential on the inside of a membrane when 2 univalent positive ions, Na+ and K+ and one univalent negative ion, chloride are involved
Henri Law
Gas solubility in a liquid is proportional to gas pressure
*Hering Breuer Law
Limits respiratory excursion (travels via *Vagus nerve)
LaPlace’s law for arteries
The tension in an artery will be proportional to the radius of the vessel
LaPlace’s law for the heart
Ventricular pressure depends on muscular tension, size and shape of the heart
Nernst Law
Potential level across a membrane exactly opposes net diffusion of particles thru the membrane
Rheobase Law
Minimum electrical current of infinite duration to elicit a threshold response
*Starling’s Law
Cardiac output is equal to venous return
(The greater the heart is filled during systole, the greater will be the force during systole)
(If venous return exceeds cardiac output=CHF)
Haldane Effect
Hemoglobin becomes more acidic binding with oxygen. Causes carbon dioxide and H+ protons to be expelled into the alveoli on expiration
*Transpulmonary Pressure=
And aka?
(Aka-“recoil pressure”)
=difference between alveolar pressure and pleural pressure. Measures elastic forces in lung
Bell Magende
Anterior spinal roots are motor, posterior are sensory
