OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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What does the synovial membrane secrete?

Hormones
Minerals
Synovial fluid
Blood cells

The correct answer is: Synovial fluid

The synovial membrane's primary function is to secrete synovial fluid, which plays a crucial role in joint health and function. This fluid acts as a lubricant for joints, reducing friction between the articular cartilage of synovial joints during movement. Additionally, synovial fluid nourishes the cartilage, providing it with essential nutrients and facilitating waste removal. The presence of this fluid is vital for maintaining joint integrity and mobility, making the secretion of synovial fluid by the synovial membrane essential for proper joint function.