When a ligand activates the G protein-coupled receptor, it induces a conformational change in the receptor that allows the receptor to function as a guanine nucleotide exchange factor ( GEF ) that exchanges GDP for GTP on the G < sub > α </ sub > subunit.

When an electric current is passed through the coil it generates a magnetic field that activates the armature, and the consequent movement of the movable contact ( s ) either makes or breaks ( depending upon construction ) a connection with a fixed contact.

When V < sub > 2 </ sub > is " on ", it activates V < sub > 4 </ sub >, driving low voltage ( logical " 0 ") to the output.

When the user activates the link ( e. g. by clicking on it with the mouse ) the browser will display the target of the link.

When Hayata activates the capsule, Ultraman does not have to appear precisely where Hayata was standing, but he usually does appear very close to that location, and often, but not always, in a similar pose.

When the organist activates the stop control, the action allows wind to flow into the selected rank.

When the inducer binds the receptor, it activates transcription of certain genes, including those for inducer synthesis.

When the fire alarm activates on a floor, audio instructions tailored to each floor of the building sound.

When such a processor reaches a temperature level deemed too high for safe operation, the thermal control circuit activates, automatically decreasing the clock and CPU core voltage until the temperature has returned to a safe level.

When the transmission from a marker beacon is received it activates an indicator on the pilot's instrument panel and the tone of the beacon is audible to the pilot.

When a temperature variation is detected the probe sends an electrical signal to the control box, which consists of an electrical circuit board that then activates or deactivates the burner system.

When the telephone is taken off-hook, it appears to the exchange as a low-value resistor, completing the circuit for the DC signal which activates the F relay.

When he callously refuses, Ben activates the camera that puts Big Ben unknowingly on live TV, where he ends up revealing his true nature on the news, even mooning the camera.

When Batman goes to rescue the child, Scarecrow activates a Venom implant, causing the boy to attack Batman.

When the machine is rocked or tilted in an attempt to gain a product, the mercury switch activates, sounding an alarm.

When Ian accidentally activates the machine, it takes them to a petrified jungle on a world devastated by an ancient nuclear war fought between the Daleks and the Thals.

When a ligand ( the neurotransmitter ) binds to the receptor ( the transducer ) the latter activates a primary effector via the G-protein, which can go on to activate secondary messengers or have other effects.

When light activates the melanopsin signaling system, the melanopsin-containing ganglion cells discharge nerve impulses that are conducted through their axons to specific brain targets.

When metarhodopsin activates transducin, the GDP bound to the α subunit ( T < sub > α </ sub >) is exchanged for GTP from the cytoplasm.

When UTP activates a substrate, UDP-substrate is usually formed and inorganic phosphate is released.

When Red Volcano activates the volcano, Zatanna uses her magic to give the illusion of Kid Flash multiplies.

When cells have reached sufficient size during G2, the phosphatase Cdc25 removes the inhibitory phosphorylation, and thus activates Cdk1 to allow mitotic entry.

When the physician is ready to record diagnostic views, which are saved and can be more carefully scrutinized later, he activates the equipment to apply a significantly higher X-ray dose, termed cine, in order to create better quality motion picture images, having sharper radiodensity contrast, typically at 30 frames per second.

When applicator activates the 2K aerosol by breaking the accessory container, the two components mix.

When the user activates the bottom of the inhaler, the energy from the spring is released and imposes pressure on the flexible liquid container, causing liquid to spray out of 2 nozzles, thus forming a soft mist to be inhaled.

`` When the husband becomes passive in the face of his wife's aggressiveness '', Dr. Linden says, `` the wife, in turn, finds him inadequate.

When the plague strikes, he finds himself trapped in a city with which he feels he has no connection.

When it finds prey, it pounces and punches through the snow to catch its victim.

When he arrives at the Necronomicon's location, he finds three books instead of one.

When Eadgils ' mound ( to the left in the photo ) was excavated in 1874, the finds supported Beowulf and the sagas.

When Mordechai finds out about the plans he and all Jews mourn and fast.

When a shipment of family heirloom restored portraits arrives at the castle, Laura finds one of her ancestors, " Mircalla, Countess Karnstein ", dated 1698.

When one society finds itself forced to relinquish power entirely to another society that in itself is a form of underdevelopment .... During the centuries of pre-colonial trade, some control over social political and economic life was retained in Africa, in spite of the disadvantageous commerce with Europeans.

When Rachel Summers leads a group of X-Men in a fight against Wolverine and the Avengers in Indonesia, Rachel finds Hope, but her mind is drawn to the psychic plane where she meets Professor X.

When he returns home, he finds that he has been so affected by the war that he cannot relate to his friends, including his wife and lover.

When Elijah finds her and asks to be fed, she says that she does not have sufficient food to keep her and her own son alive.

When he wakes he finds bread and a jar of water.

When Lee returns to Roper, he finds that most of Han's men have been defeated and rounded up but in a bittersweet moment, Roper also finds Tania's lifeless body lying amongst the wreckage.

Le Laboratoire des Hallucinations, by André de Lorde: When a doctor finds his wife's lover in his operating room, he performs a graphic brain surgery rendering the adulterer a hallucinating semi-zombie.

When they arrive, Teg finds Odrade and Sheeana and their giant worm.

When Poseidon finds out that Odysseus has escaped, he wrecks the raft but, helped by a veil given by the sea nymph Ino, Odysseus swims ashore on Scherie, the island of the Phaeacians.

When a despairing Mayerson chooses death, he finds himself apparently forced into Eldritch's body right at the point in the timeline where Bulero is ready to shoot a torpedo at Eldritch's ship.

When Polyphemus returns home with his flocks and finds Odysseus and his men, he blocks the cave entrance with a great stone, trapping the remaining Greeks inside.

When Ben finds a television, the emergency broadcaster reports that the recently deceased have become reanimated and are consuming the flesh of the living.

When McKay finds out about Julie, for whom his own feelings have been becoming increasingly obvious, he rides to the Hannassey place with Ramon.

When he wakes, he finds himself held captive in a mysterious seaside " village " that is isolated from the mainland by mountains and sea.

When Ruth returns to Sheffield, she goes first to the Kemps ' house and finds Mrs. Kemp's body in their shelter.

When Estragon finally succeeds in removing his boot, he looks and feels inside but finds nothing.

When a rooster finds food, he may call other chickens to eat first.