1.-Introduction-to-Hormones its a science

its introduction to harmones

1. Key Definitions Endocrine System– composed of glands that secrete hormones directly into the bloodstream. The Endocrine System’s effects are slower than the Nervous System but act for longer. Target Organ – the organ a particular hormone acts on. Pituitary Gland – the ‘master gland’ which secretes several hormones into the blood in response to body conditions. Hormone – a chemical, produced by a gland secreted into the blood, that has a biological effect on a target organ.

2. How does the Endocrine System work? As you watch the video, complete the worksheet TEDed – How do your hormones work?

3. Add labels to your blank body diagram

4. Add labels to your blank body diagram

5. Match the gland to the hormone Pituitary Gland… …produce adrenaline Pancreas… …produce testosterone Testes… …produces insulin Ovaries… …produce oestrogen Adrenal Glands… …produce thyroxine Thyroid Glands… …is the master gland that stimulates other glands

6. Compare and contrast the endocrine and nervous systems [6] Endocrine System Nervous System Type of signal Chemical Electrical How is signal carried? By the bloodstream By neurones Speed of response Slower Very Fast Duration of response Usually long Short Effectors Target Cells/Organs Muscles or glands Response Varied, usually chemical Contraction/secretion