All-or-none action potentials

the minimal intensity of stimulating current (threshold intensity) that, acting for a given duration, will just produce an action potential. The thresholdintensity varies with the duration; with weak stimuli it is long, and with strong stimuli it is short

TLS Online TPP Program

#Id: 10371

#Unit 4. Cell Communication and Cell Signaling

A given MHC molecule can bind numerous different peptides, and some peptides can bind to several different MHC molecules. Because of this MHC molecule is often referred to as “promiscuous”.

TLS Online TPP Program

#Id: 10372

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 10373

#Unit 4. Cell Communication and Cell Signaling

MHC-Peptide Interaction

TLS Online TPP Program

#Id: 10374

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 10375

#Unit 4. Cell Communication and Cell Signaling

One individual, however, expresses only a small number of these molecules—up to six different class I molecules and 12 or more different class II molecules.

TLS Online TPP Program

#Id: 10376

#Unit 4. Cell Communication and Cell Signaling

MHC molecules in mouse