Biology Key Word Definitions (O) 0.0 / 5 ? BiologyBiology Key Word Definitions (O)GCSEAQA Created by: Atlanta and JacobCreated on: 15-02-16 16:11 What is obese? Very overweight, with a BMI of over 30. 1 of 14 What is oestrogen? Female sex hormone which stimulate the lining of the womb to build up in preparation for a pregnancy. 2 of 14 What is oral contraceptive? Hormone contraceptive that is taken by mouth. 3 of 14 What is the organ system? A group of organs working together to carry out a particular function. 4 of 14 What is organic waste? Waste material from living organisms, e.g. garden waste. 5 of 14 What is osmosis? The net movement of water from an area of high concentration (of water) to an area of low concentration (of water) along a concentration gradient. 6 of 14 What is ova? The female sex cells, eggs. 7 of 14 What is an ovary? A female sex organ which contains the eggs and produces sex hormones during the menstrual cycle. 8 of 14 What is overweight? A person is overweight if their body carries excess fat and their BMI is between 25 and 30. 9 of 14 What is an ovipositor? A pointed tube found in many female insects which is used to lay eggs. 10 of 14 What is ovulation? The release of a mature egg from the ovary in the middle of the menstrual cycle. 11 of 14 What is oxygen debt? The extra oxygen that must be taken into the body after exercise has stopped to complete the aerobic respiration of lactic acid. 12 of 14 What does oxygenated mean? Containing oxygen. 13 of 14 What is oxyhaemoglobin? The molecule formed when haemoglobin binds to oxygen molecules. 14 of 14
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