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1. Define stimulus.
Changes in the environment that are recognised by in the body are called stimulus.
2. Name the parts of the hind brain.
The make up the hind brain.
3. What are the structures involved in the protection of brain?
connective tissue membranes protect the brain. The is the thick fibrous outermost membrane. The is a thin circulatory membrane that provides a web-like cushion. The innermost, thin, delicate membrane amply nourished with blood is known as the .