Daily Review of class notes. Human Reproduction Packet due Friday Date: March 15th, 2017 Aim # 58: How can hormones influence the reproductive cycles in humans? HW: Daily Review of class notes. Human Reproduction Packet due Friday Test next week Do Now: How many eggs are released by the female each month? Where does fertilization occur? Where does development of the embryo take place?

Aim #58: How can hormones influence the reproductive cycles in humans?

What is puberty? Our bodies change. You grow taller & bigger. Our sexual organs mature. Hair appears where there was no hair before. You may begin to feel attracted to another individual.

1) Control of Reproductive Systems The Hypothalamus & Pituitary Gland produce hormones that influence the gonads to produce sex hormones

2) Hormonal Control of the Female Reproductive System: Beginning at puberty, female reproductive organs undergo a cycle of changes that prepare the body for the possibility of pregnancy. Menstrual Cycle The hypothalamus, the pituitary gland, and the ovaries produce hormones that control this cycle of change. What is this cycle of change called?

3) Menstrual Cycle (28 Days) Follicular Phase (14 Days) Ovulation (1 Day) Corpus Luteum Phase (14 Days)

a) Follicular Stage (14 days) FSH (follicle stimulating hormone) secreted from pituitary gland stimulates the ovary to produce estrogen FSH also causes egg to mature inside a follicle Estrogen causes the lining of uterus to begin to thicken 10-14 days

How does a woman get ready to get pregnant? An egg is produced & the lining of the uterus thickens to receive the embryo

b) Ovulation (1 day) Around day 14 LH (luteinizing hormone)secreted by the pituitary gland increases and the follicle bursts Release of an egg into the oviduct (This is when a woman can get pregnant)

c) Corpus Luteum (10 days)- Broken follicle is now a corpus luteum Secretes estrogen & progesterone to further thicken the lining of the uterus 10-14 days

4) What is menstruation? Occurs if there is NO fertilization Hormones decrease Uterine lining sheds 3-7 days

5) Uterine Lining A woman gets rid of the old uterine lining & the unfertilized egg (if the egg is NOT fertilized)

6) Hormones & the menstrual cycle Which hormones peak before ovulation? Which hormone peaks after ovulation?

Daily Review of class notes. Human Reproduction Packet due Friday Date: March 16th, 2017 Aim # 58: How can hormones influence the reproductive cycles in humans? HW: Daily Review of class notes. Human Reproduction Packet due Friday Test next week Do Now: What are hormones? How do they travel around the body? What is the name of the GLAND in the brain? What hormones does it secrete? What hormones are produced by the gonads? Hormones CONTROL the reproductive cycle. Which life function does this describe?

Brain Pop: Puberty ~3 minutes https://www.brainpop.com/health/geneticsgrowthanddevelopment/puberty/

7) Girls’ Secondary Sex Characteristics: Hips widen Pubic hair Breasts enlarge Due to hormones estrogen and progesterone.

8) Hormonal Regulation of the Testes: Beginning at puberty, the pituitary gland secretes FSH & LH. The rising levels of these hormones stimulate the testes to produce testosterone. Testosterone stimulates the production of sperm.

9) Boys Secondary Sex Characteristics: Voice Deepens Facial Hair Muscular Development Pubic Hair Due to the hormone Testosterone.

10) What mechanism is involved in the control of reproduction? FEEDBACK MECHANISM

Summary Glands secrete _____________(chemical messengers). These structures are part of the _________________ system which are part of the life function R_____________. What is the name of the glands in the brain? What do they secrete? What organs does it affect? What is the name of the chemical messengers produced by the gonads? The menstrual cycle prepares the female body for…. What mechanism is involved in the control of reproduction?