The Frank-Starling law of the heart states that 

The volume of blood ejected by the ventricle depends on the volume present in the ventricle at the end of diastole. The volume present at the end of diastole depends on the volume returned to the heart, or the venous return.

TLS Online TPP Program

#Id: 1342

#Unit 4. Cell Communication and Cell Signaling

HER3 lacks a functional kinase domain

TLS Online TPP Program

#Id: 1343

#Unit 4. Cell Communication and Cell Signaling

RAS is a small monomeric G-proteins.

TLS Online TPP Program

#Id: 1344

#Unit 4. Cell Communication and Cell Signaling

RAS is connected to the membrane by a prenylated (lipid) tail.

TLS Online TPP Program

#Id: 1345

#Unit 4. Cell Communication and Cell Signaling

All Ras have the CAAX motifs at the C-terminus.

TLS Online TPP Program

#Id: 1346

#Unit 4. Cell Communication and Cell Signaling

Post-translational modifications of the CAAX motifs determine the subcellular localization and correct biological function of Ras proteins.

TLS Online TPP Program

#Id: 1347

#Unit 4. Cell Communication and Cell Signaling

SOS – Ras GEF

NF1 - Ras GAP