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TLS Online TPP Program

#Id: 5662

The basilar membrane is relatively permeable to perilymph in the scala tympani, and tunnel of the organ of Corti and the bases of the hair cells are bathed in perilymph





#Unit 7. System Physiology – Animal #Sense Organs #Part B Pointers
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TLS Online TPP Program

#Id: 182

#Unit 5. Developmental Biology

Epithelial-Mesenchymal Transition
An orderly series of events whereby epithelial cells are transformed into mesenchymal cells.
TLS Online TPP Program

#Id: 183

#Unit 5. Developmental Biology

Morphogen is a diffusable biochemical molecule that can determine the fate of a cell by its concentration.
TLS Online TPP Program

#Id: 184

#Unit 5. Developmental Biology

Morphogens can be:
Transcription factors
Paracrine factors
TLS Online TPP Program

#Id: 185

#Unit 5. Developmental Biology

A morphogen specifies cells in a quantitative (“more or less”) manner.
TLS Online TPP Program

#Id: 186

#Unit 5. Developmental Biology

A morphogenetic determinant specifies cells in a qualitative (“present or absent”) way.
TLS Online TPP Program

#Id: 187

#Unit 5. Developmental Biology

In the frog (Xenopus laevis)
A gradient of the paracrine factor activin (a morphogen), causes concentration-dependent expression differences of two genes in unspecified cells.