Heteronymous (opposite sides of the visual fields) Hemianopia 

A lesions in the optic chiasm

TLS Online TPP Program

#Id: 9705

#Unit 4. Cell Communication and Cell Signaling

The receptors for yeast α and a mating factors are coupled to the same trimeric G protein.

TLS Online TPP Program

#Id: 8022

#Unit 1. Molecules and their Interaction Relevant to Biology

TLS Online TPP Program

#Id: 5544

#Unit 7. System Physiology – Animal

The thick ascending limb has a sodium-hydrogen counter-transport

TLS Online TPP Program

#Id: 1488

#Unit 4. Cell Communication and Cell Signaling

The DNA damage checkpoint controlled by p53.

TLS Online TPP Program

#Id: 1890

#Unit 4. Cell Communication and Cell Signaling

Two distinct selection processes are required:

 • Positive selection, which selects for those thymocytes bearing receptors capable of binding self-MHC molecules, resulting in MHC restriction

• Negative selection, which selects against thymocytes bearing high-affinity receptors for self-MHC/peptide complexes, resulting in self-tolerance.