Menstrual Cycle
Cards (33)
- Is the maintenance of an internal environment of the body from the harm and fluctuation of the external environment and helps in maintaining body stability.
- It is the process through which the level of one substance influences the level of another substance.
- The response that strengthens the change in a controlled condition.
- Clotting factors released to seal a wound.
- The dilation of the walls of the uterus at the time of birth causes contraction and encourages further stretching (continues until childbirth).
- In menstruation, the estrogen hormone promotes the secretion of other hormones that will lead to ovulation.
- Affects the production of hormones in the menstrual cycle.
- High levels of one hormone may inhibit the production of another hormone.
- reverses a change in a controlled condition
- Blood sugar regulation
- thermoregulation in endotherms
- Menstrual Cycle
- Fluid-filled pockets called follicles develop on the ovaries. Each follicle contains an egg.
- One follicle continues growing while the others stop growing and are absorbed back into the ovary; levels of the hormone estrogen from the ovaries continue to rise.
- the follicle puts out increasing levels of estrogen and grows larger, usually, period bleeding has stopped.
- higher estrogen levels from the follicle make the lining of the uterus grow and thicken
- higher estrogen levels from the follicle make the lining of the uterus grow and thicken
- The uterine lining is rich in blood and nutrients and will help nourish the embryo if a pregnancy happens.
- Estrogen helps boost endorphins, which are the "feel good" brain chemicals that are also released during physical activity.
- A woman may have more energy and feel relaxed or calm.
- Estrogen levels peak and cause a sharp rise in the level of luteinizing hormone (LH).
- LH causes the mature follicle to burst and release an egg from the ovary, called ovulation.
- A woman is most likely to get pregnant if she had sex on the day of ovulation or even three days before ovulation.
- In the few days before ovulation, estrogen levels are at their highest. A woman may feel best around this time, emotionally and physically.
- The fallopian tubes help the newly released travel away from the ovary toward the uterus.
- The ruptured follicle on the ovary makes more of the hormone progesterone, which also helps the uterine lining thicken even more.
- If a sperm joins with the egg in the fallopian tube (this is called fertilization), the fertilized egg will continue down the fallopian tube and attach to the lining of the uterus (womb).
- Pregnancy begins once a fertilized egg attaches to the womb.
- If the egg is not fertilized, it breaks apart.
- Estrogen and progesterone levels drop if the woman is not pregnant.
- This rapid change in levels of estrogen and progesterone can cause moods to change.
- Some women are more sensitive to these changing hormone levels than others.
- Some women feel irritable, anxious, or depressed during the premenstrual week but others do not.