The Pituitary

Mindmap of the pituitary gland

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The Pituitary by Mind Map: The Pituitary

1. Anterior Pituitary

1.1. Growth Hormone

1.1.1. Stimulates growth and the breakdown of fat

1.1.2. Disorders Gigantism Acromegaly Pituitary Dwarfism

1.2. Prolactin

1.2.1. In females, stimulates breasts to produce milk and in males the maturation of sperm.

1.2.2. Disorders Females: infertility Males: sterility

1.3. Tropic Hormones

1.3.1. Adrenocorticotropic Hormone Stimulated by corticotropin releasing hormone from the hypothalamus Targets the cortex of adrenal glands Stimulates the release of glucocorticoid Disorders Hyposecretion leads to Addison's Disease Hypersecretion leads to Cushing's Disease

1.3.2. Thyroid-Stimulating Hormone Synthesis and release of a thyroid hormone Stimulates release of thyroid hormones T3 and T4 Stimulated directly by TRH from hypothalamus Disorders Hyposecretion can lead to hypothyroidism Hypersecretion can lead to hyperthyroidism

1.3.3. Follicle-Stimulating Hormone The Gonadotropin releasing hormone from the hypothalamus stimulates the Follicle- Stimulating Hormone Targets the ovaries in females and the testes in males Females Stimulates ovarian follicle to mature Stimulates production of estrogen Initiates development of the oocyte in the ovaries Estrogen inhibits FSH Males Stimulates sperm production Testosterone inhibits FSH

1.3.4. Luteinizing Hormonr Stimulated by the gonadotropin releasing hormone Inhibited by negative feed back Females Males Targets the ovaries and the testes Female Males

1.4. Made of glandular tissue

2. Posterior Pituitary

2.1. Made of nerve endings

2.2. Posterior pituitary does not produce any hormones

2.2.1. Hormones come from hypothalamus and are then stored and released when needed Oxytocin Stimulated by positive feed back Targets smooth muscle of the uterus Targets smooth muscle of the breasts Antidiuretic Hormone Release Actions Disorders