Biology Revision – CHAPTER 5 – Coordination and Control Part 1 Responding to change The nervous system uses electrical ………………………. to enable you to react to your surroundings and ………………………… what you do. Specialised cells called ………………………. detect changes in the environment known as stimuli. Impulses from receptors pass along …………………… neurones to the brain. Impulses are sent from the brain to the effector organs along ……………………… neurones. Sensory and motor Neurones Describe the differences between Sensory and motor neurones? Sensory Neurone Motor Neurone Reflex arc Label the diagram below: Endocrine System Hormones Hormones are ……………… messengers that help to control and co-ordinate processes in your body. They are secreted by ……………………. and carried around your body to their target (effector) organs in the ………………… They act slowly but their effects are …………… lasting. The ………………… gland is often called the master gland as it controls the other glands in the …………………… system. Label the glands in the endocrine system 1 5 2 6 3 7 4 8

Controlling blood glucose Spread of scientific data Biology Revision – CHAPTER 5 – Coordination and Control Part 2 Controlling blood glucose If blood glucose levels increase the ………………………… detects it and releases the hormone ………………………. into the blood. Insulin causes cells to ……………………… glucose from the blood. In muscle and liver cells it is often converted into …………………… If blood glucose levels drop the hormone …………………………… is released to cause cells to release ………………….. back into the blood. Menstrual Cycle Contraception Describe how barrier method contraception works. How do oral contraceptives work? Hormone Where it is made? What does it do? What other hormones does it affect? FSH Oestrogen LH Progesterone Method Advantages Disadvantages Condoms Diaphragm IUD Diabetes What is the difference between type 1 and type 2 diabetes? How can type 1 and type 2 diabetes be treated? Spread of scientific data Calculating a …………… reduces the effect of random errors and gives a best …………………… of the true value. It is calculated by ………………… all the values and …………………. by the number of values. The ………………. is a measure of the spread of the data. It is calculated by finding the difference between the ………………… and ……………………… values.