Nervous System to Hormone

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Comparing the nervous system to the hormonal system http://www.scienceclarified.com/He-In/Hormones.html 1. What are hormones? Hormones are chemicals messages produced by one tissue in an organism and then secreted to other tissues in the organism, which produce a response; 2. Describe the ways that a hormone brings about a change in the activity of its target cell. Plant hormones; auxins are regulated in order to release chemicals to coordinate growth due to the lack of the nervous system using the process phototropism. However mammalian hormones are secreted by endocrine glands, also known as ductless glands. Examples of endocrine glands include the hypothalamus, pituitary gland, pineal gland, thyroid, parathyroid, thymus, adrenals, pancreas, ovaries, and testes. Hormones are secreted from these glands directly into the bloodstream. They then travel to target tissues and regulate digestion, growth, maturation, reproduction, and homeostasis. 3. Give examples of hormones within animals and plants and state their function. Animal hormones | Function | Plant hormones | Function | Vasopressin in pituitary gland | It is produced in the pituitary gland at the base of the brain and excreted into the bloodstream. It is transported to the kidneys causing an increase in water retention which increases blood pressure. They reduce loss of water from kidneys. | Auxins | They alter the rate at which various cells in the plant grow so that it always bends towards the light. | Adrenalin in adrenal gland | Initiates emergency fight or flight responses in the nervous system | | | Testosterone in testes | Develop and maintain sex organs and male secondary sex characteristics | | | Cortisone in adrenal gland | Control the metabolism of carbohydrates and proteins producing energy and to maintain proper balance of electrolytes regulating the

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