Biology 1A - Human Biology: Hormones in Humans

HideShow resource information
Aside from the Nervous System, what other way can you send information around the body?
Hormones.
1 of 35
What are Hormones?
Hormones are chemicals released directly into the blood.
2 of 35
How do hormones get to other parts of the body?
They are carried in the blood.
3 of 35
What is the name of the particular cells that hormones affect?
Target Cells.
4 of 35
What are hormones produced in and secreted by?
Glands.
5 of 35
What is the full definition of a hormone?
Hormones are chemical messengers which travel in the blood to activate target cells.
6 of 35
What does the pituitary gland do?
It produces hormones including FSH and LH. They're involved in the menstrual cycle.
7 of 35
What do the ovaries do?
Ovaries produce oestrogen, which is involved in the menstrual cycle.
8 of 35
Which complete actions faster, Nerves or Hormones?
Nerves, nerves have a fast reaction whilst hormones have a slower reaction.
9 of 35
Which act for longer, Nerves or Hormones?
Hormones, nerves act for a short time whilst hormones act for a long time.
10 of 35
Which act in a more precise area, Nerves or Hormones?
Nerves, nerves act in a very precise area whilst hormones act in a more general way.
11 of 35
Describe the menstrual cycle in four stages.
Stage 1: The lining of the uterus breaks down and bleeding starts (Day 1) Stage 2: The lining of the uterus builids up, ready for a fertilised egg (Day 4) Stage 3: Egg released (Day 14) Stage 4: Lining of uterus maintained. (Day 14-28)
12 of 35
Which three hormones are involved in the menstrual cycle?
FSH, Oestrogen, LH.
13 of 35
What does FSH stand for?
Follicle-Stimulating Hormone
14 of 35
What does LH stand for?
Luteinising Hormone
15 of 35
Where is FSH produced?
The pituitary gland.
16 of 35
Name two things that FSH does.
Causes an egg to mature in one of the ovaries. Causes ovaries to produce Oestrogen
17 of 35
Where is Oestrogen produced?
The ovaries.
18 of 35
What hormone does Oestrogen stop being released?
FSH.
19 of 35
What does LH do?
LH causes the release of an egg from the ovaries.
20 of 35
The pill is what type of contraceptive?
Oral.
21 of 35
The first version of the pill contained high levels of what?
Oestrogen and Progesterone.
22 of 35
There were concerns about a link between oestrogen in the pill and side effects, like what?
Blood clots.
23 of 35
What happened to the pill to reduce the amount of side effects?
It now contains lower doses of oestrogen.
24 of 35
Name two pro's of using the pill.
1. It is very effective at preventing pregnancy. 2. It reduces the risk of getting some types of cancer.
25 of 35
Name three con's of using the pill.
1. There's still a very slight chance of getting pregnant. 2. It doesn't protect against STDs. 3. It can cause side effects like headaches.
26 of 35
Some women's bodies cannot cause their eggs to mature. Why?
Their levels of FSH are too low.
27 of 35
Which hormones do women inject to stimulate egg release in their ovaries?
FSH and LH.
28 of 35
Name one pro of injecting FSH and LH.
It helps a lot of women to get pregnant.
29 of 35
Name two cons of injecting FSH and LH.
1. It doesn't always work. 2. It can cause multiple pregnancies.
30 of 35
What does IVF stand for?
In Vitro Fertilisation
31 of 35
What does IVF involve?
Giving FSH and LH to a woman to stimulate egg production.
32 of 35
Within IVF, what happens after eggs are produced?
They are collected from the woman's ovaries and fertilised in a lab using the man's sperm. The fertilised eggs grow into embryos. Then the cells are transferred to the woman's uterus.
33 of 35
Name one pro of IVF.
It can give an infertile couple a child.
34 of 35
Name two cons of IVF.
1. Some women have a strong reaction to the hormones - e.g. Vomiting 2. Multiple births can happen - these are risky for the mother and babies.
35 of 35

Other cards in this set

Card 2

Front

What are Hormones?

Back

Hormones are chemicals released directly into the blood.

Card 3

Front

How do hormones get to other parts of the body?

Back

Preview of the front of card 3

Card 4

Front

What is the name of the particular cells that hormones affect?

Back

Preview of the front of card 4

Card 5

Front

What are hormones produced in and secreted by?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Nervous system, hormones and behaviour resources »