Biology keywords 2. 0.0 / 5 ? BiologyHomeostasisGCSEAQA Created by: Gbarritt2Created on: 02-02-16 16:12 Stimulus. Change in the environment, such as a temperature change, that you respond to. 1 of 19 Central Nervous System (CNS). The brain and spinal cord. 2 of 19 Receptor. Cell or sense organ that detects stimuli. 3 of 19 Peripheral nervous system (PNS). Nerves carrying information from sense organs in the body to the CNS, and from the CNS to the effectors. 4 of 19 Neurone. Cell specialised to carry electrical impulses. Nerve cells. 5 of 19 Reflex Action. Fast automatic response of the body to a potentially dangerous stimulus, coordinated by the spinal cord. 6 of 19 Synapse. Small gap between neurones, or between a neurone and effector. 7 of 19 Effector. Organ such as gland or muscle that responds to a stimuli. 8 of 19 Hormone. Chemical made by a gland and carried in the blood to its target organ(s). 9 of 19 Secrete. Produce a hormone in special cells of a gland. 10 of 19 Gland. Structure inside an organism that makes a useful substance, often a hormone. 11 of 19 Target organ. Organ or part of the body that responds to a particular hormone. 12 of 19 Ion. Charged particle, e.g. Na+, K+, Mg+. 13 of 19 Sex Hormones. Hormones produced in the sex organs (ovaries and testes). 14 of 19 Oestrogen. A female sex hormone involved in regulating the menstrual cycle. 15 of 19 Progesterone. A female sex hormone involved in maintaining the uterus lining. 16 of 19 FSH (follicle stimulating hormone). A female sex hormone, involved in making eggs mature in the ovaries. 17 of 19 LH (luteinizing hormone). A female sex hormone involved in triggering ovulation. 18 of 19 In vitro fertilization (IVF). Fertilization carried out outside the body, so the egg and sperm join in a glass dish to form an embryo that is injected back into the woman's uterus. 19 of 19
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