Which protective membranes cover and protect the brain and spinal cord?

Which organ produces bile that aids in the digestion of fats?

Which fluid cushions and protects the brain and spinal cord from mechanical shock?

Which respiratory condition involves inflammation and narrowing of the airways causing difficulty in breathing?

Which biological process allows water to move across a cell membrane from a region of low solute concentration to high concentration?

Which common everyday substance is classified as a strong acid frequently used in car batteries?