# Disorders of the CNS

> This section covers the causes and symptoms of two disorders of the central nervous system: Alzheimer's disease and multiple sclerosis. A disorder of the central nervous system is a condition that…

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## More in RESPONDING TO THE ENVIRONMENT (Humans)

- [The simple reflex arc](https://www.hlayiso.com/grade-12/life-sciences/notes/responding-to-the-environment-humans/the-simple-reflex-arc) — Previous section
- [Receptors](https://www.hlayiso.com/grade-12/life-sciences/notes/responding-to-the-environment-humans/receptors) — Next section
- [All RESPONDING TO THE ENVIRONMENT (Humans) sections](https://www.hlayiso.com/grade-12/life-sciences/notes/responding-to-the-environment-humans)

## Frequently asked questions

### What will I learn in "Disorders of the CNS"?

This section covers Disorders of the CNS as part of RESPONDING TO THE ENVIRONMENT (Humans) in Grade 12 Life Sciences. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

### Is this section aligned with the CAPS curriculum?

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Continue with the next section in RESPONDING TO THE ENVIRONMENT (Humans), or test your understanding with the interactive quiz linked to this section.

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