The light-absorbing/ emitting center of GFP (its chromophore) comprises an oxidized form of the tripeptide –Ser65–Tyr66–Gly67

TLS Online TPP Program

#Id: 5327

#Unit 7. System Physiology – Animal

Isovolumetric Ventricular Relaxation

begins after the ventricles are fully repolarized, marked by the end of the T wave on the ECG.

TLS Online TPP Program

#Id: 5328

#Unit 7. System Physiology – Animal

Rapid Ventricular Filling

ventricular pressure falls to its lowest level (below atrial pressure), the AV valve opens.

TLS Online TPP Program

#Id: 5329

#Unit 7. System Physiology – Animal

Rapid Ventricular Filling

Ventricular pressure remains low, because the ventricle is still relaxed and compliant.

TLS Online TPP Program

#Id: 5330

#Unit 7. System Physiology – Animal

Rapid Ventricular Filling

The rapid flow of blood from the atria to the ventricles produces the third heart sound (S3).

TLS Online TPP Program

#Id: 5331

#Unit 7. System Physiology – Animal

Third heart sound (S3) 

normal in children but is not heard in normal adults

indicates volume overload, as in congestive heart failure or advanced mitral or tricuspid regurgitation.

TLS Online TPP Program

#Id: 5332

#Unit 7. System Physiology – Animal

Rapid Ventricular Filling

aortic pressure decreases as blood runs off from the aorta into the arterial tree, to the veins, and then back to the heart.