GRK–β-arrestin pathway, suppress signaling by GPCRs, actually functions as a switch, turning off signaling by G proteins and turning on other signaling pathways.

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#Id: 5479

#Unit 7. System Physiology – Animal

Ca2+ uptake into the terminal causes release of the neurotransmitter acetylcholine (ACh), which has been previously synthesized and stored in synaptic vesicles.

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#Id: 5675

#Unit 7. System Physiology – Animal

When the shorter stereocilia are pushed toward the taller ones, the open time of cation channels is increased

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#Id: 6047

#Unit 10. Ecological Principles

Major Types of Terrestrial biome 

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#Id: 386

#Unit 2. Cellular Organization

The H32.H42 tetramer bound to DNA recruits two copies of the H2A.H2B dimer to complete the assembly of the final nucleosome

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#Id: 7819

#Unit 10. Ecological Principles

Many organisms minimize heat loss to the environment via countercurrent heat exchange