Hormones (Reproductive System) Flashcards
Where Gondotrophin Releasing Hormone (GnRH) secreted and its functions
Secreted by hypothalamus
Function: stimulates the production of LH and FSH
Where is Oestrogen secreted and its functions
Secreted by ovary (follicle)
Function: Rebuilds the uterine lining, stimulates release of LH
Where is Progesterone secreted and its functions
Secreted by ovary (corpus luteum)
Function: inhibits the production of FSH, maintaining the line of uterus
Where is Luteinising Hormone (LH) secreted and its functions?
Secreted by anterior pituitary gland
Function: stimulates ovulation and production of corpus luteum
Where is Testosterone secreted and its functions
Secreted by testis
Function: stimulates the development of male characteristics
Where is Androgen- binding hormone secreted and its functions
Secreted by seminiferous tubules
Function: maintains high levels of testosterone
Where is Prostaglands secreted and its functions
Secreted by most cells- including uterus and Copus luteum
Function: Aid with uterine contractions (blood clotting)
Where is Oxytocin secreted and its functions
Secreted by posterior pituitary gland
Function: stimulates uterine contractions
(Let down of milk for lactation)
Where is Cortisol secreted and its functions
Secreted by adrenal gland
Function: ‘stress hormone’ linked to increased maternal interest in offspring
Where is Prolactin secreted and its functions
Secreted by pituitary gland
Function stimulates lactation (production of milk)
Where is Insulin secreted and its functions
Secreted by pancreas
Function: reduces blood glucose
Where is Glucagon secreted and its functions
Secreted by pancreas
Function increases blood glucose
Where is Follicle stimulating hormone (FSH) secreted and its functions
Secreted by ovaries
Function: produces follicle ready for egg to be released
Where is Antidiuretic hormone ADH secreted and its functions
Secreted by hypothalamus
Function: controls osmoregulation
Where is Relaxin secreted and its functions
Secreted by ovaries
Function: relaxes the pelvis ligaments and opens birth canal
What hormone is responsible for uterine contractions during parturition
- Oxytocin
Name the hormone important in rebuilding the uterine lining
- Oestrogen
State how the following hormones change when an animal is giving birth:
1. Oestrogen
2. Oxytocin
3. Progesterone
4. Prostaglandin
- Oestrogen- increases
- Oxytocin- increases
- Progesterone- decreases
- Prostaglandin- increases
What is a hormone?
- Chemical messenger
What is the function of oestrogen
- Rebuilds the uterine lining after menstruation
- Stimulates reproductive behaviours
Where is GnRH secreted
- Hypothalamus
What does spermatogenesis
- (Genesis) -creation
- In male mammals, sperm are created continuously
What does oogenesis mean?
- (Oo)- ovum
- In females, ova are produced as part of the menstrual/oestrous cycle
What does gametogenesis mean?
- The formation of gametes (ovum and sperm) is controlled by follicle stimulating hormone (FSH) and luteinising hormone (LH)
What is the function of cortisol?
- The “stress hormone”- maternal instinct
What is the function of oxytocin?
- Stimulates uterine contractions and the let-down of milk
What is the function of testostrone?
- Make male characteristics
- Production of sperm
What is the function of LH?
- Stimulates ovulation