Homeostasis And Response

Question 1

What do hormone cause during puberty?

Answer 1

Secondary sexual characteristics

Question 2

What is the main sex hormone in women?

Answer 2

Oestrogen

Question 3

What is ovulation?

Answer 3

When during puberty and after a women releases mature eggs

Question 4

What is the main male sexual hormone?

Answer 4

Testosterone

Question 5

What are the four hormones involved in the menstrual cycle?

Answer 5

FSH
Oestrogen
LH
Progesterone

Question 6

Where is FSH produced and what is its function ?

Answer 6

Pituitary Gland
Causes eggs to mature in ovaries at the start of cycle
Stimulates oestrogen production

Question 7

Where is oestrogen produced and what is it’s role in the menstrual cycle?

Answer 7

Ovaries
Inhibits FSH
Stimulates LH release
Makes lining of uterus grow again after the cycle

Question 8

What does LH do and where is it produced?

Answer 8

Pituitary Gland

Stimulates the release of the egg from the ovary during ovulation

Question 9

What does progesterone do in the menstrual cycle and where is it produced ?

Answer 9

Empty follicle in ovaries
Maintains lining of uterus during second stage of the cycle
Inhibits FSH and LH release

Question 10

What can reduce fertility?

Answer 10

Contraception

Question 11

What are the types of contraception and some more examples?

Answer 11

Hormonal: the pill, an injection

Non-hormonal: condoms, diaphragms, intrauterine devices, spermicide, surgery

Question 12

What does the fertility drug do?

Answer 12

Gives FSH and LH when a woman’s levels are too low which stimulates eggs to mature

Question 13

What does IVF do?

Answer 13

• Gives Woman FSH and LH which matures eggs
• collecting the eggs
• fertilising the eggs with sperm from father
• inserting 1-2 embryos into the uterus

Question 14

What are the problems with fertility treatments?

Answer 14

• it is emotionally and physically stressful
• the success rate is low
• can lead to multiple births which are high risk

Question 15

What is tropism?

Answer 15

A plants physical response to the surroundings

Question 16

What are the three stimuli for tropism?

Answer 16

Water
Light
Gravity

Question 17

What is gravity tropism called?

Answer 17

Gravitropic

Question 18

What is light tropism called ?

Answer 18

Phototropic

Question 19

What group of plant hormones control tropism?

Answer 19

Auxins

Question 20

What do auxins cause in shoots?

Answer 20

Growth

Question 21

What do auxins cause is roots?

Answer 21

Less growth

Question 22

What are gibberellins ?

Answer 22

A group of plant hormones which are important in initiating seed germination

Question 23

What is Ethene in plants?

Answer 23

Controls cell division and ripening of fruits

Question 24

Required practical- Plant Hormones

Answer 24

1. Take a few plastic boxes and make equal holes in the side
2. Put some soil in the boxes and plant in 10 seeds each
3. Put lids on containers
4. Place the containers in even lighting in different directions
5. Water and leave for a few days

Question 25

What are used of auxins?

Answer 25

Used as weed killers to encourage too much growth which means they die from malnourishment
Root powders to make cuttings make roots when planted
Promoting growth in tissue culture

Question 26

Use of ethene?

Answer 26

Used In the food industry to control fruit ripening during storage and transport

Question 27

Uses of gibberellins?

Answer 27

End seed dormancy
Promote flowering
Increase fruit size