When there is too much thyroid hormone, the TSH will be low.

When hyperthyroidism does appear in dogs, it tends to be due to over-supplementation of the thyroid hormone during treatment for hypothyroidism.

When the larva is fully grown, hormones such as prothoracicotropic hormone ( PTTH ) are produced.

When the body requires fatty acids as an energy source, the hormone glucagon signals the breakdown of the triglycerides by hormone-sensitive lipase to release free fatty acids.

When traveling across a number of time zones, the body clock will be out of synchronization with the destination time, as it experiences daylight and darkness contrary to the rhythms to which it has grown accustomed: the body's natural pattern is upset, as the rhythms that dictate times for eating, sleeping, hormone regulation and body temperature variations no longer correspond to the environment nor to each other in some cases.

When there is an excess of hormone Y, gland X " senses " this and inhibits its release of hormone X.

When a peptide hormone binds to receptors on the surface of the cell, a second messenger appears in the cytoplasm, which triggers intracellular responses.

When plasma is diluted by excessive water intake ( or hyponatremia ), syndrome of inappropriate antidiuretic hormone secretion ( SIADH ), hemodialysis, or rapid reduction of blood glucose in hyperosmolar hyperglycemic state ( HHS ), formerly hyperosmolar non-ketotic acidosis ( HONK ), the brain osmolality will then exceed the serum osmolality creating an abnormal pressure gradient down which water will flow into the brain causing edema.

When levels of somatotropin are low in the body, a physican may prescribe human growth hormone as a drug — see Growth hormone treatment.

When growth hormone is deficient, blood sugar is low because insulin is not opposed by normal amount of growth hormone.

When GH deficiency ( usually with other anterior pituitary deficiencies ) is associated with posterior pituitary hormone deficiency ( usually diabetes insipidus ) the condition is termed panhypopituitarism.

When rearing mealworms, commercial growers incorporate a juvenile hormone into the feeding process to keep the mealworm in the larval stage and achieve an abnormal length of 2 cm or greater.

When insulin binds to its receptors on the surface of a cell, the hormone receptor complex undergoes endocytosis and is subsequently attacked by intracellular lysosomal enzymes.

When this hormone was mixed with cerebral endothelial cells as well as astrocytes, the pericytes grouped into structures that resembled capillaries.

When no binding hormone is present the carboxyl terminal inhibits transcription.

When dosages are high, the human body reacts by reducing the production of LH ( luteinizing hormone ), thinking endogenous testosterone production is too high ; this in turn eliminates further stimulation of Leydig cells in the testicles, causing testicular atrophy ( shrinking ).

When disruptive change has penetrated to the third level of social order, the process of disruption rapidly reaches a point of no return.

When this water level has been reached, inject steam into the wheel until the temperature reaches that shown in Column B of Table 2.

When gastric hydrochloric acid reaches the nerves in the gastrointestinal mucosa, they signal pain to the central nervous system.

Neurons generate electrical signals that travel along their axon s. When a pulse of electricity reaches a junction called a synapse, it causes a neurotransmitter chemical to be released, which binds to receptors on other cells and thereby alters their electrical activity.

When the child reaches skeletal maturity ( 18 to 25 years of age ), all of the cartilage is replaced by bone, fusing the diaphysis and both epiphyses together ( epiphyseal closure ).

When the total vapor pressure reaches the pressure surrounding the liquid, boiling occurs and liquid turns to gas throughout the bulk of the liquid.

When the process of escape and return reaches an equilibrium, the vapor is said to be " saturated ," and no further change in either vapor pressure and density or liquid temperature will occur.

) When the orthodromic stimulus reaches the muscle fiber, it elicits a strong M-response indicative of muscle contraction.

When the antidromic stimulus reaches the motor neuron cell bodies, a small portion of the motor neurons backfire and orthodromic wave travels back down the nerve towards the muscle.

When a particular substance, whether chemical or biotic — reaches unsafe levels in the bloodstream, the body can effectively dilute — or at least maintain equilibrium of — the offending substances by storing it in new fat tissue.

When a pilot moves the control column ( or sidestick ), a signal is sent to a computer ( analogous to moving a game controller ) the signal is sent through multiple wires ( channels ) to ensure that the signal reaches the computer.

When the actuator reaches the desired position, the two signals ( incoming and outgoing ) cancel each other out and the actuator stops moving ( completing a feedback loop ).

When he finally reaches the cables, Andoh tries to stop him from releasing them.

A Power stroke: When the piston reaches a point just before top dead center, the spark plug ignites the fuel mixture.

When it reaches the towns of Saugatuck and Douglas it stops and enters Lake Michigan.

When this news of his family ’ s execution reaches him, Macduff is stricken with grief and vows revenge.

When the voltage of C1 right-hand plate ( Q2 base voltage ) becomes positive and reaches 0. 6 V, Q2 base-emitter junction begins diverting a part of R2 charging current.

When the water reaches the coastline, the corresponding coastal ponds, both freshwater and brackish, fill to capacity and beyond, spilling over into the sea.

When the timer reaches 0: 00, the blinds go to a higher level.

When the air reaches a high altitude, where the temperature is low, water vapor condenses into clouds, which rain onto the Earth's surface, completing the water cycle.

When a neurotransmitter is released at a synapse, it reaches its highest concentration inside the narrow space of the synaptic cleft, but some of it is certain to diffuse away before being reabsorbed or broken down.

When the game score reaches three points each, the receiver chooses which side of the court ( advantage court or deuce court ) the service is to be delivered on the seventh and game-deciding point.

When the incident angle is increased sufficiently, the transmitted angle ( in air ) reaches 90 degrees.

# When a pair reaches 5 points in the final game, the pairs must switch ends of the table and the team that receives the service must switch receiver.

When the bus reaches its destination, the passengers on the bus — including the narrator — are gradually revealed to be ghosts.