252.Cells in the layers labeled A and C in the figure below secrete plas-
minogen activator and collagenase that is required for which of the
following?
Reproductive Systems 371a. Dissolution of the zona pellucida to facilitate sperm penetration
b. pH regulation within the antral cavity
c. Breakdown of the basement membrane between the thecal and granulosa lay-
ers, facilitating ovulation
d. Diffusion of androgens between the thecal and granulosa cells
e. Facilitation of follicular atresia through breakdown of the basement membrane
between the theca interna and externa