B1.2 Nerves and Hormones 0.0 / 5 ? BiologyNervous system, hormones and behaviourGCSEAQA Created by: alicetradewellCreated on: 11-04-16 18:32 Nervous system Allows humans to react to their surroundings and coordinates behaviour 1 of 26 Receptor Detect external stimuli 2 of 26 Sense organ Where receptors are found - the eye, ear, nose, tongue, and skin 3 of 26 Stimuli Changes in the environment 4 of 26 Impulse The signal that travels along the length of a nerve fiber 5 of 26 Neurons Specially adapted cells that carry electrical signals (e.g nerve impulses) 6 of 26 Central Nerve System (CNS) Made up of the brain and spinal cord. 7 of 26 Sensory neuron Carry impulses from receptors to the CNS 8 of 26 Motor neuron Carry impulses from the CNS to effector organs 9 of 26 Effector organ Create the response. Either muscles or glands 10 of 26 Reflex actions Rapid, automatic responses to a stimulus which protect us from damage 11 of 26 Synapse A gap or junction between two neurons 12 of 26 Reflex arc The sequence from receptor to effector 13 of 26 FSH Follicle stimulating hormone -made by the pituitary gland and causes the egg to mature and oestrogen to be produced 14 of 26 Pituitary gland Gland in the brain that produces FSH and LH. 15 of 26 Oestrogen Produced by the ovaries, and stops further production of FSH. Stimulates production of LH and the womb lining to develop to receive a fertilised egg 16 of 26 Ovulation When the egg is released from the ovary 17 of 26 Progesterone Inhibits further production of FSH. Used in contraceptive pills 18 of 26 Internal environment The conditions in our body that need to be controlled: water content, ion content, temperature and blood sugar level 19 of 26 Kidney Organ which produces urine 20 of 26 Urine How we control water and ion content 21 of 26 Enzyme A biological catalyst which help the body carry out a reaction. 22 of 26 Pancreas Controls our blood sugar level 23 of 26 Phototropism The response of plant shoots growing toward light 24 of 26 Gravitropism/Geotropism The response of plant roots growing down toward gravity 25 of 26 Auxin The hormone that controls phototropism and gravitropism 26 of 26
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