Final answer:
The synovial membrane lines the capsule surrounding a joint and produces synovial fluid for lubrication, facilitating smooth joint movements. It is not located in the mouth, lungs, or bladder.
Step-by-step explanation:
Location of Synovial Membranes
The synovial membrane is a specialized type of connective tissue membrane that serves a critical function in joint mobility. This membrane can be found lining the capsule surrounding a joint, such as those in the shoulder, elbow, and knee. The primary role of the synovial membrane is to produce synovial fluid, which is crucial for lubricating the joints to allow smooth, pain-free movement.
The synovial fluid is a thick, stringy fluid that is secreted by the synovial membrane and contains hyaluronan. This substance helps to trap water, forming a viscous solution that reduces friction between the articulating surfaces of bones within a joint. Consequently, the correct answer to where a synovial membrane can be found is 'lining the capsule surrounding a joint'. It is not found in the mouth, lining the lungs, or covering the bladder.