Health Science Practice Pack – Body
Systems & Homeostasis
Level: High school/ Year 11
This pack includes:
Concise study notes
Key definitions & relationships
Practice quiz
Fully worked / explained solutions
1. Key Study Notes
What is Health Science?
Health Science focuses on understanding how the human body functions,
how it maintains balance, and how lifestyle choices affect health.
Homeostasis
Homeostasis: The process by which the body maintains a stable
internal environment
Maintains factors such as:
o Body temperature
o Blood glucose levels
o Water balance
o pH levels
Feedback Mechanisms
Negative feedback: Reverses a change to return conditions to
normal (most common)
Positive feedback: Amplifies a change (rare, e.g. childbirth)
Major Body Systems
Nervous System
Controls rapid responses
Uses electrical signals
Includes brain, spinal cord, nerves
Endocrine System
Systems & Homeostasis
Level: High school/ Year 11
This pack includes:
Concise study notes
Key definitions & relationships
Practice quiz
Fully worked / explained solutions
1. Key Study Notes
What is Health Science?
Health Science focuses on understanding how the human body functions,
how it maintains balance, and how lifestyle choices affect health.
Homeostasis
Homeostasis: The process by which the body maintains a stable
internal environment
Maintains factors such as:
o Body temperature
o Blood glucose levels
o Water balance
o pH levels
Feedback Mechanisms
Negative feedback: Reverses a change to return conditions to
normal (most common)
Positive feedback: Amplifies a change (rare, e.g. childbirth)
Major Body Systems
Nervous System
Controls rapid responses
Uses electrical signals
Includes brain, spinal cord, nerves
Endocrine System
