Final answer:
The intermembrane space is between the inner and outer membranes of the mitochondrion, and the mitochondrial matrix is inside the inner membrane. ATP is synthesized on the inner membrane's cristae and exits the mitochondrion through transport proteins and channels into the cell's cytosol.
Step-by-step explanation:
The question pertains to the structure and function of the mitochondrion, specifically where ATP is synthesized and how it exits the inner and outer membranes. The intermembrane space is the area between the inner and outer mitochondrial membranes. The mitochondrial matrix is the space contained within the inner membrane, rich in enzymes, mitochondrial DNA, and ribosomes.
ATP synthesis occurs on the inner membrane of the mitochondrion, at a structure known as ATP synthase. The ATP produced then exits the mitochondrion by passing through transport proteins found in the inner membrane and subsequently through channels in the outer membrane to enter the cytosol, where it provides energy for the cell.
To label a diagram, you would draw an arrow at the folds (cristae) of the inner mitochondrial membrane to show where ATP is synthesized. The ATP travels from the inner membrane to the intermembranes space, and from there, it exits the outer membrane into the cytosol of the cell.