ZIMSEC O-Level Biology
8.16.2Homeostasis
Homeostasis in ZIMSEC O-Level Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic46 practice questions2 lessons
Overview
Form 4.
Learning objectives
What the syllabus expects you to be able to do.
- 8.16.2.1Define homeostasis, identify the parts of the skin and relate them to temperature regulation (temperature receptors, sweating, shivering, vasodilation, vasoconstriction), including the role of the brain (hypothalamus) and negative feedback.
- 8.16.2.2Define excretion and state the substances excreted by the kidneys, lungs and skin.
- 8.16.2.3Describe the structure and functions of the urinary system and the kidney (cortex, medulla, pelvis; urine formation, osmoregulation, pH regulation), and explain how a dialysis machine works.
Lessons
- Full access
Excretion: the kidneys and the liver
21 min
- Full access
Skin and body temperature control
18 min
Join to read every lesson, or see what Full access includes.
Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
Turn Homeostasis into a strength.
Practise with instant marking, see your mastery grow and get a study plan built around your exam date.