Final answer:
The response of a follicular cast in dermatological conditions involves inflammation, either due to infection in cases like folliculitis or blockages in acne. In ovarian cycles, follicular development leads to ovulation, with tertiary follicles producing estrogen, affecting hormone regulation.
Step-by-step explanation:
The level of response of a follicular cast can be understood in the context of dermatological conditions such as folliculitis and acne, which are inflammatory responses of hair follicles. In folliculitis, hair follicles become inflamed due to infection, resulting in raised lesions. Acne involves inflammation due to hair follicles being clogged with lipids, fatty acids, and dead skin cells, creating an environment conducive to bacterial growth.
In the context of the ovarian cycle, secondary follicles are structures with a primary oocyte and multiple layers of granulosa cells, important in the development of secondary sex characteristics. The maturation of follicles, including folliculogenesis, culminates in ovulation, where a dominant follicle ruptures to release its oocyte. The large tertiary follicles produce significant amounts of estrogen in response to LH stimulation, influencing systemic plasma estrogen concentrations and, through negative feedback, the regulation of GnRH, LH, and FSH.