Feedback systems (HT only)

Biology (Combined Science) · GCSE · AQA · AQA GCSE Combined Science: Trilogy (8464) — Biology — Higher · Specification point · 4.5.3.6 · Homeostasis and response · Hormonal coordination in humans

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Learning Objectives

4.5.3.6 Feedback systems (HT only)

Content	Key opportunities for skills development
$Students should be able to explain the roles of thyroxine and adrenaline in the body. Adrenaline is produced by the adrenal glands in times of fear or stress. It increases the heart rate and boosts the delivery of oxygen and glucose to the brain and muscles, preparing the body for ‘flight or fight’. Thyroxine from the thyroid gland stimulates the basal metabolic rate. It plays an important role in growth and development.$
$Thyroxine levels are controlled by negative feedback.$	$WS 1.2, MS 2c Interpret and explain simple diagrams of negative feedback control.$

Content

Key opportunities for skills development

Students should be able to explain the roles of thyroxine and adrenaline in the body. Adrenaline is produced by the adrenal glands in times of fear or stress. It increases the heart rate and boosts the delivery of oxygen and glucose to the brain and muscles, preparing the body for ‘flight or fight’. Thyroxine from the thyroid gland stimulates the basal metabolic rate. It plays an important role in growth and development.

Thyroxine levels are controlled by negative feedback.

WS 1.2, MS 2c Interpret and explain simple diagrams of negative feedback control.

Feedback systems (HT only) (4.5.3.6) | AQA GCSE Combined Science: Trilogy (8464) — Biology — Higher | KnowledgeSet