Science (Puberty and hormones)

Question 1

1. What part of the brain releases the hormone that regulates the secretion of LH and FSH?
2. What is this hormone?

Answer 1

1. the hypothalamus

2. GRH (gonandotropin releasing hormone)

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. in the blood
2. release of progesterone and estrogen
3. 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

Effects of LH…in females:
-Acts on ovaries to stimulate them to produce ________
-Ovaries respond to increasing estrogen, causing the mature follicle to _______
-Inhibited by _________
Effects of LH…in males:
-Triggers production of ______ in ________

Answer 7

• to produce estrogen
• mature follicle to burst
• inhibited by progesterone
• testosterone in testicles

Question 8

Effects of FSH...in females:
-Acts on ovaries to produce \_\_\_\_\_\_\_\_\_
-Stimulates development of \_\_\_\_\_\_\_\_\_
Effects of FSH...in males:
-Makes \_\_\_\_\_\_\_\_\_ sensitive to \_\_\_\_\_\_
-Aids in \_\_\_\_\_\_\_\_\_\_\_\_\_\_
-Inhibited by \_\_\_\_\_\_ thus slowing down spermatogenesis

Answer 8

• estrogen
• follicles in ovary
• spermatogonia sensitive to testosterone
• spermatogenesis
• inhinbin

Question 9

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 9

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

Question 10

Effects of progesterone in females

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

Answer 10

1. the menstrual cycle

2. pregnancy and lactation

Question 11

Effects of testosterone in males

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

Answer 11

1. testes, LH

2. spermatogenesis