Posterior Pituitary Hormones

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Decrease in ADH

Diabetes insipidus

Oxytocin

Effects: Stimulates powerful uterine contractions during birth and stimulates milk ejection (let down) in lactating mothers

ADH

Effects: Stimulates the kidneys to reabsorb more water, reducing urine output and conserving body water

Hypothalamic Hypophyseal Tract

Provides for the transport of hormones from the hypothalamus to the posterior pituitary via neurons

Oxytocin

Stimulus for Release: Nerve impulses from the hypothalamic neurons in response to cervical/uterine stretch

ADH

Stimulus for release: Nerve impulses from hypothalamic neurons in response to increased blood solute concentration or decreased blood volume

Where are the hormones secreted by the posterior pituitary made?

Synthesized in the hypothalamus and stored and released by the posterior pituitary

Oxytocin

Taget: Uterus and Mammary glands

ADH

Target: Kidneys

Which hormones are secreted by neurons?

Oxytocin and ADH

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