Maintaining internal environments (B3.3) | OCR GCSE Combined Science A (Gateway Science) — Biology — Higher (J250) | KnowledgeSet

Maintaining internal environments

Biology (Combined Science) · GCSE · OCR · OCR GCSE Combined Science A (Gateway Science) — Biology — Higher (J250) · Specification point · B3.3 · Organism level systems

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Learning Objectives

B3.3 Maintaining internal environments

Summary Homeostasis is crucial to the regulation of internal environments and enables organisms to adapt to change, both internally and externally. Internal temperature, blood sugar levels and osmotic balance are regulated by a number of organs and systems working together. Underlying knowledge and understanding Learners will build on the knowledge and understanding gained in section 3.1 about coordination and control when considering the topics in this section.

Reference	Mathematical learning outcomes	Maths skills
$BM3.3i$	$extract and interpret data from graphs, charts and tables$	$M2c$

Learning outcomes	To include	Maths	Working scientifically	Practical suggestions

$B3.3a explain the importance of maintaining a constant internal environment in response to internal and external change$	$allowing metabolic reactions to proceed at appropriate rates$		$WS1.4a$	$Research into hypothermia.$
$B3.3b explain how insulin controls blood sugar levels in the body$		$M2g$
$B3.3c explain how glucagon interacts with insulin to control blood sugar levels in the body$		$M2c$	$WS2a, WS2b, WS2c, WS2d$	$Investigations into the glucose content of fake urine to diagnose diabetes, using e.g. Clinistix. (PAG B5)$
$B3.3d compare type 1 and type 2 diabetes and explain how they can be treated$