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.
Pituitary and ovary: The pituitary hormones FSH and LH help the egg sac, or follicle grow and mature. A sudden surge of LH induces ovulation. The ovary produces estradiol, to prepare the pelvic organs and progesterone, after ovulation, to stabilize the endometrial lining for pregnancy. ...Read more.