In the dark, 

membrane potential of a rod cell is about −30 mV (Depolarized state)

Rod cells release neurotransmitters (glutamate) constantly

TLS Online TPP Program

#Id: 7011

#Unit 5. Developmental Biology

Regulation is highly influenced by the microenvironment that surrounds a stem cell and is known as the stem cell niche.

TLS Online TPP Program

#Id: 7012

#Unit 5. Developmental Biology

All tissue types possess a unique stem cell niche, and despite many differences among the niche architecture of different tissues

TLS Online TPP Program

#Id: 7013

#Unit 5. Developmental Biology

All tissue types possess a unique stem cell niche, and despite many differences among the niche architecture of different tissues.

TLS Online TPP Program

#Id: 7014

#Unit 5. Developmental Biology

The types of the intracellular mechanisms used by a given stem cell are in part the downstream net result of the extracellular stimuli in its niche.

TLS Online TPP Program

#Id: 7015

#Unit 5. Developmental Biology

Physical mechanisms of influence, including Structural & adhesion factors within the extracellular matrix that support the cellular architecture of the niche. 

TLS Online TPP Program

#Id: 7016

#Unit 5. Developmental Biology

Differences in cell-to-cell and cell-to-matrix adhesions as well as the cell density within the niche can alter the mechanical forces that influence stem cell behavior.