Cette leçon contient 21 diapositives, avec quiz interactif et diapositives de texte.
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Reproduction
Hormones part 1
Slide 1 - Diapositive
Learning objectives
Describe what hormones are and how they are transported through the body
Describe the hormonal system in males and females related to reproduction
Describe the effect and importance of negative feedback
Describe what happens during the phases of the menstrual cycle and how it is regulated by hormones
Slide 2 - Diapositive
What do you know about hormones?
Slide 3 - Diapositive
Hormones
Chemical messengers (proteins or steroid molecules) that are secreted by hormone glands and transported with the blood. Therefore each hormone ends up everywhere in the body.
They connect to receptors on or inside of the cells of the target organ(s) and trigger a response.
Slide 4 - Diapositive
Hormone gland
Blood
Target organ
Produce and secrete the hormone. Can be far from target organ. They always produce small amounts.
Blood travels throughout the entire body, therefore the hormones will end up everywhere.
The cells of the target organ have receptors the hormones can bind to and trigger a response
Example:
Pancreas produces insuline
Transported everywhere in the body
Mainly liver and muscle cells to stimulate the uptake of glucose
Slide 5 - Diapositive
Slide 6 - Diapositive
How come organs don't respond to all hormones that pass by with the blood?
Slide 7 - Question ouverte
Male hormone cycle
Slide 8 - Diapositive
Location
Slide 9 - Diapositive
Negative feedback
The hormone that is produced inhibits (decreases) its own production.
This creates a balance in hormone levels.
Testosterone inhibits the hypothalamus and pituitary gland which slows down its own production
Slide 10 - Diapositive
Questions
What do FSH and LH stimulate in men?
What are their respective target cells and where are they situated?
What hormones are produced by these target cells and what is their effect?
Because of an inflammation one of the sperm ducts in a male is closed off. What happens with the testosterone levels?
Slide 11 - Diapositive
Slide 12 - Diapositive
Location
Slide 13 - Diapositive
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Slide 16 - Diapositive
Questions
When does the menstrual cycle start?
In which part of the female reproductive system do the ova (egg cells) develop?
On which day in the cycle does ovulation on average occur and what hormone is causing ovulation?
Why is it on average?
What is shed during the menstruation of a female?
Slide 17 - Diapositive
Questions
Luteinizing Hormone (LH) is produced by the ..?
The effects of estrogen on the production of follicle stimulating hormone (FSH) is an example of...?
The corpus luteum is mainly responsible for the production of..?
Progesterone inhibits ...... and stimulates......?
Which hormone is secreted in large quantities by the follicle in the follicular phase?
Slide 18 - Diapositive
Write down for yourself and learn:
Different stages of the menstrual cycle.
FSH, LH, estrogen and progesterone.
Produced where, target organ?
Functions for each hormone.
At what moment in the menstrual cycle are the levels high?
What are the positive effects and what are the negative (feedback) effects?
Slide 19 - Diapositive
Learning objectives
Describe what hormones are and how they are transported through the body
Describe the hormonal system in males and females related to reproduction
Describe the effect and importance of negative feedback
Describe what happens during the phases of the menstrual cycle and how it is regulated by hormones
Slide 20 - Diapositive
Work to be done
Biozone pg 239 and 240 (Treating infertility and human reproductive technology)
