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TLS Online TPP Program

#Id: 5215

Plasminogen is converted to active plasmin when t-PA hydrolyzes the bond between Arg 560 and Val 561. plasmin also activated by urokinase-type plasminogen activator (u-PA).



#Unit 7. System Physiology – Animal #Blood and circulation #Part B Pointers
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TLS Online TPP Program

#Id: 7361

#Unit 5. Developmental Biology

On the left side of Hensen’s node, Sonic hedgehog (Shh) activates Cerberus, which stimulates BMPs to induce the expression of Nodal
TLS Online TPP Program

#Id: 7362

#Unit 5. Developmental Biology

In the presence of Nodal, the Pitx2 gene is activated
TLS Online TPP Program

#Id: 7363

#Unit 5. Developmental Biology

On the right side of the embryo, activin is expressed, along with activin receptor IIa. This activates Fgf8, a protein that blocks expression of the gene for Cerberus.
TLS Online TPP Program

#Id: 7364

#Unit 5. Developmental Biology

In the absence of Cerberus, Nodal is not activated and thus Pitx2 is not expressed
TLS Online TPP Program

#Id: 7365

#Unit 5. Developmental Biology

Drosophila eggs undergo Superficial cleavage.
TLS Online TPP Program

#Id: 7366

#Unit 5. Developmental Biology

In the Drosophila egg, karyokinesis occurs without cytokinesis to create a syncytium.