Hormones In The Male Reproductive System Flashcards
At puberty how many hormones are produced by the male pituitary gland?
Two
What two hormones are produced by the male pituitary gland at puberty?
FSH (follicle stimulating hormone)
LH (Luteinising hormone)
When is FSH and LH produced by the male pituitary gland?
At puberty
What gland produces FSH and LH at puberty?
The pituitary gland
What does FSH stand for?
Follicle stimulating hormone
What does LH stand for?
Luteinising hormone
What is the function of FSH in males?
It causes the diploid sperm-producing cells in the testes to divide by meiosis and produce haploid sperm
What is the function of LH in males?
It stimulates the testes to produce testosterone
What hormone causes the diploid sperm-producing cells in the testes to divide by meiosis and produce haploid sperm?
Follicle stimulating hormone (FSH)
What hormone stimulates the testes to produce testosterone?
Luteinising hormone (LH)
What are male hormones called?
Androgens
What are androgens?
Male hormones
What is the main androgen?
Testosterone
When is testosterone produced by males?
It is produced in small amounts by the testes before puberty but its production increases enormously at puberty
When does testosterone production in males increase enormously?
At puberty
What produces testosterone in males?
The testes
What produces testosterone in females?
The ovaries
When is testosterone produced in females?
It is produced throughout life
What amounts of testosterone is produced in females and pre-pubescent males?
Small amounts of testosteron
What does testosterone cause in males early in life?
It causes the primary male characteristics
What are the primary male characteristics?
2
The growth of the penis and other male reproductive parts
The descent of the testes into the scrotum
What does testosterone bring about at puberty?
2
It brings about the enlargement of the penis, testes and other reproductive parts
It causes the secondary male characteristics
What are secondary sexual characteristics?
Secondary sexual characteristics are those features that distinguish males from females, apart from the sex organs themselves
List the secondary male characteristics.
6
Growth of pubic, underarm, facial and body hair
Enlargement of the larynx, causing the voice to break and deepen
Increased muscular and bone development
Widening of the shoulders
Growth spurt (body weight may double)
Increased secretion of sebum in the skin
What causes the voice to break and deepen in males?
The enlargement of the larynx
What does the enlargement of the larynx cause?
It causes the voice to break and deepen
