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A control system that acts by secreting hormones directly into the bloodstream, which then travel to other parts of the body to act on effectors (cells, tissues, organs)

G-protein coupled

Receptor type is important for oxytocin, GHRH, somatostatin, dopamine?

Tyrosine kinase

Receptor type is important for insulin, IGF-1?


Receptor type is important for EPO, leptin, prolactin and GH?


Type of receptor is important for oestrogen


The state of equilibrium of the body that is maintained by dynamic processes of feedback and regulation

Blood brain barrier

Important process for protecting neurones from blood


Acts on alveolar epithelial cells in the breast to induce synthesis and secretion of milk


Acts on myoepithelial cells in the breast to induce contraction and ejection of the milk


Regulates and coordinates responses to changes in the external and internal environment

Posterior pituitary gland

Is made up of nerve terminals. Oxytocin and vasopressin are two important neurohormones released from

Anterior Pituitary Gland

Endocrine cells that secrete hormones into the general circulation


GH (growth hormone), stimulates growth


Prolactin - memory gland, lactation


LH (luteinising hormone)
FSH (follicle stimulating hormone), both stimulate gonads


TSH (thyroid stimulating hormone)


ACTH (adrenocorticotrophic hormone)


Releasing inhibitory factor for prolactin


Releasing inhibitory factor for growth hormone (GH)

Growth hormone

- Major determinant of growth
- Increase number and size of cells in soft tissues
- Increase thickness and length of long bones

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