Some of these incoming fibers go to the motor nucleus of the trigeminal nerve (V), bypassing the pathways for conscious perception. The jaw jerk reflex is an example; tapping the jaw elicits a reflex closure of the jaw in the same way that tapping the knee elicits a reflex kick of the lower leg.
FSH stimulates the production of eggs and LH stimulates the release of the egg. FSH and LH are produced by the pituitary gland in the brain. There are four stages in the menstrual cycle. Stage 1. Days 1-4. Menstruation (bleeding) occurs. The lining of the uterus disintegrates and is shed. This is due to low levels of progesterone. Stage 2. Days 4-14. The uterine lining grows back.
The corpus luteum secretes progesterone & other hormones to maintain early pregnancy which maintains the uterine lining during the first months of pregnancy. The corpus luteâ¦um in the ovary results from the release of an egg. It now produces progesterone to maintain the endometrium of the uterine walls. The corpus luteum is a yellow body. Before it released the egg, it was white and referred to as the corpus albicans (white body).