Puberty and hormones

Question 1

At the onset of puberty, what in the brain produces a hormone called ____?

Answer 1

The hypothalamus produces a hormone called gonadotropin releasing hormone (GRH)

Question 2

1. GRH stimulates what part of the brain to releases FSH and LH?
2. What does FSH and LH stand for?

Answer 2

1. pituitary gland

2. follicle stimulating hormone, lutenizing hormone

Question 3

1. How do these hormones travel?
2. What happens when they reach the ovaries?
3. What happens when they reach the testes?

Answer 3

1. through the bloodstream
2. trigger the release of progesterone and estrogen
3. trigger the release of testosterone

Question 4

1. When does puberty start for females?

2. For males?

Answer 4

1. (8-13)

2. (9-14)

Question 5

What are the 7 physical changes that happen to women during puberty?

Answer 5

1. lengthening of face
2. milk ducts start to grow in breasts
3. pubic + underarm hair grow
4. fat develops on hips, butt, thighs
5. pelvic bones grow + hips widen
6. menstruation begins
7. sexual feelings and desire

Question 6

What are the 6 physical changes that happen to boys during puberty?

Answer 6

1. bones of forehead, nose, jaw grow
2. growth of facial, pubic, underarm hair
3. changes in structure of voice box, voices deepen
4. penis, testicles, scrotum grow
5. sperm production begins
6. erections develop

Question 7

What are the 3 effects of LH in females?

Answer 7

1. Acts on ovaries to stimulate them to produce estrogen
2. Ovaries respond to increasing estrogen, causing the mature follicle to burst
3. Inhibited by progesterone

Question 8

What is the effect of LH in males?

Answer 8

Triggers production of testosterone in testicles

Question 9

What are the two effects of FSH in females?

Answer 9

1. Acts on ovaries to produce estrogen

2. Stimulates development of follicles in ovary

Question 10

What are the 3 effects of FSH in males?

Answer 10

1. Makes spermatogonia sensitive to testosterone
2. Aids in spermatogenesis
3. Inhibited by inhibin thus slowing down spermatogenesis

Question 11

Effects of estrogen in females

1. Where is it manufactured and what is it stimulated by?
2. What does it do to the lining of the uterus?
3. When does the release of this hormone drop?
4. Where are the levels of this hormone high and low?

Answer 11

1. ovaries, FSH
2. makes the lining of the uterus thicken
3. after ovulation
4. Low=pituitary, High=hypothalamus

Question 12

Effects of progesterone in females

1. What does it regulate?
2. What does it maintain?

Answer 12

1. the menstrual cycle

2. pregnancy and lactation

Question 13

Effects of testosterone in males

1. Where is it manufactured and what is it stimulated by?
2. What des it stimulate?

Answer 13

1. testes, LH

2. spermatogenesis

Question 14

Effects of inhibin in males

1. What is it secreted by ______ when enough spermatozoa have been manufactured and stored in the epididymis
2. Stops _____ from releasing ______

Answer 14

1. gonads

2. Stops the pituitary gland from releasing FSH