Term 3
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B2 Biological responses
The human nervous system
Students will study the principles of homeostasis, details of the human nervous system and its structure and function and be able to describe a reflex arc, with detail of synaptic transmission.
Students will study the brain, linking each area with its function. There is a higher-tier topic of investigating the brain and the treatment of brain damage.
Students will study the structure and function of the human eye and the process of accommodation. Students should be able to describe common defects of the eye including myopia, hyperopia, and the role of new technology in the treatment of these conditions.
Hormonal communication
Students will study the principles of hormonal control, the endocrine system and the hormones they produce. They will learn how blood-glucose concentration is controlled, including the role of insulin and glucagon, and clearly distinguish between glucose, glycogen, and glucagon. All students should be aware of the causes and treatments of both type 1 and type 2 diabetes.
Students will study the process of negative feedback, particularly as applied to the hormones adrenaline and thyroxine. Students will study hormones in human reproduction, in bringing about puberty, the menstrual cycle in females, testosterone in males,
contraception and infertility treatments.
Students will study the role of hormones in plants, and the tropism responses they cause and the use of plant hormones in agriculture and horticulture.
Required practical: The effect of light or gravity on the growth of newly germinated seedlings.
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End of topic tests
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