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Science / Year 9 / Science understanding / Biological sciences

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View on Australian Curriculum website Australian Curriculum, Assessment and Reporting Authority
Curriculum content descriptions

compare the role of body systems in regulating and coordinating the body’s response to a stimulus, and describe the operation of a negative feedback mechanism (AC9S9U01)

Elaborations
  • exploring the body’s observable responses to external stimuli (such as changes in light or temperature, or presence of danger or pathogens) or internal stimuli (such as dehydration or hunger)
  • using models, flow diagrams and virtual simulations to explore and represent the relationships between body systems that are necessary to coordinate a response to stimuli
  • comparing the role and function of electrical impulses and hormones in the body’s responses to external stimuli
  • modelling how the process of regulation is monitored and adjusted by connections between the receptor, command centre and effector
  • describing how negative feedback mechanisms maintain the direction of a stimulus and accelerate its effect
  • examining how negative feedback mechanisms serve to maintain balance in internal systems, such as body temperature, blood sugar, iron levels or extracellular pH
  • examining the effects of a disorder in a feedback system, such as diabetes-induced blindness or hypothermia
  • considering how understanding of feedback mechanisms has enabled the development of pharmaceuticals and other products to address issues or enhance performance, such as insulin or electrolytes in sports drinks
General capabilities
  • Critical and creative thinking Critical and Creative Thinking
ScOT terms

Nervous system,  Endocrine system,  Homeostasis,  Immune system,  Plant metabolism

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