AP activates a  voltage gated Ca2+ channel in the T-tubule membrane, it triggers the opening of a Ca2+ -release channel in the closely associated SR membrane

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#Id: 7893

#Unit 2. Cellular Organization

A human cell has about 1000–2000 mtDNA molecules

A human egg has about 500,000 mtDNA molecules

A sperm has only about 100 mtDNA molecules

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#Id: 5215

#Unit 7. System Physiology – Animal

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).

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#Id: 728

#Unit 3. Fundamental Processes

DnaA is an ATP-binding protein and its binding to DNA is affected depending on whether ATP

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#Id: 5804

#Unit 7. System Physiology – Animal

Hypothyroidism Autoimmune thyroiditis TSH deficiency

I- deficiency

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#Id: 1328

#Unit 4. Cell Communication and Cell Signaling

β-adrenergic receptors are deactivated by, β-adrenergic receptor kinase (BARK)