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MassachusettsBiology

Module 4: Anatomy and physiology

5 dot points across 5 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How does the digestive system break food into usable molecules, and how does the immune system defend the body against pathogens?

Describe how the digestive system breaks food into absorbable molecules and how the immune system defends the body against pathogens, including the roles of white blood cells and antibodies (MA STE HS-LS1-2, HS-LS1-3, structure and function).
A standard-level answer on digestion and immunity for the Massachusetts High School Biology MCAS: how the digestive system breaks food into absorbable molecules and how white blood cells and antibodies defend against pathogens under HS-LS1.
11 min answer →

How does the body keep its internal conditions stable, and how does negative feedback correct a change?

Explain how feedback mechanisms, especially negative feedback, maintain homeostasis (a stable internal environment), using examples such as temperature and blood glucose regulation (MA STE HS-LS1-3, stability and change).
A standard-level answer on homeostasis for the Massachusetts High School Biology MCAS: what a stable internal environment means, how negative feedback corrects a change, and examples such as temperature and blood glucose regulation under HS-LS1-3.
12 min answer →

How do the body's organ systems interact as a larger system, and why does an organism depend on this cooperation?

Explain how multiple organ systems interact to carry out the functions of the body, using the model of a system of interacting subsystems, and connect this to the maintenance of homeostasis (MA STE HS-LS1-2, systems and system models).
A standard-level answer on interacting body systems for the Massachusetts High School Biology MCAS: how organ systems work together as a system of subsystems, with worked examples linking circulation, respiration, digestion, and control to homeostasis under HS-LS1-2.
11 min answer →

How do the nervous and endocrine systems detect changes and coordinate responses, and how do they differ in speed and duration?

Describe how the nervous system and the endocrine system detect stimuli and coordinate responses, and compare the two control systems in terms of signal type, speed, and duration (MA STE HS-LS1-3 supporting, structure and function).
A standard-level answer on the nervous and endocrine systems for the Massachusetts High School Biology MCAS: how each detects stimuli and coordinates responses, and how they compare in signal type, speed, and duration under HS-LS1.
11 min answer →

How do the circulatory and respiratory systems deliver oxygen and nutrients to every cell and remove wastes?

Describe how the circulatory and respiratory systems transport oxygen, carbon dioxide, and nutrients, and explain how their structures (such as alveoli and capillaries) suit gas exchange and delivery (MA STE HS-LS1-2, HS-LS1-3, structure and function).
A standard-level answer on transport and gas exchange for the Massachusetts High School Biology MCAS: how the circulatory and respiratory systems move oxygen, carbon dioxide, and nutrients, and how alveoli and capillaries suit their functions under HS-LS1.
11 min answer →