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B3 > B3.2 > Flashcards

B3.2 Flashcards

1
Q

Adrenaline

A

hormone released during stress. It causes changes which make the body ready for action

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2
Q

Auxin

A

plant hormone responsible for growth through cell elongation

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3
Q

Contraception

A

technique used to prevent pregnancy

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4
Q

Endocrine gland

A

gland which produces and secretes a hormone

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5
Q

Endocrine system

A

all the endocrine glands and the hormones they produce

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6
Q

Ethene

A

plant hormone that causes plant fruits to ripen by stimulating the conversion of starch into sugar

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7
Q

fertility treatment

A

technique used to increase a woman’s chance of getting pregnant

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8
Q

FSH

A

Follicle stimulating hormone - female hormone that causes an egg to mature and stimulate the ovaries to produce oestrogen

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9
Q

Gibberellins

A

plant hormones that promote growth (particularly stem elongation) and end the dormancy period of seeds and
buds

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10
Q

Gravitropism

A

growth in response to gravity (also known as geotropism)

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11
Q

Homeostasis

A

maintenance of a constant internal environment

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12
Q

Hormone

A

chemical messenger which travels in the blood

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13
Q

luteinising hormone (LH)

A

female hormone which triggers ovulation

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14
Q

negative feedback

A

a system that detects a change in a condition. The system then acts to return conditions to the desired level

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15
Q

Oestrogen

A

female hormone that causes the lining of the uterus to build up

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16
Q

Ovulation

A

release of a mature egg from an ovary

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17
Q

Period

A

Loss of uterus lining

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18
Q

Phototropism

A

Growth in response to light

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19
Q

Progesterone

A

female hormone that maintains the uterus lining

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20
Q

Target organ

A

Organ a hormone has an effect on

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21
Q

Thyroxine

A

Hormone that controls metabolism

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22
Q

Tropism

A

Growth in response to an external stimulus

23
Q

How is the brain involved in Homeostasis?

A

Coordinates response to external and internal stimuli

24
Q

How are the lungs involved in Homeostasis?

A

Control amount of o2 and co2 in blood

25
Q

How are the muscles involved in Homeostasis?

A

Can respond to environment (external), blood sugar level (internal)

26
Q

How is the skin involved in Homeostasis?

A

Can control temperature and sense external environment (internal and external)

27
Q

How is the pancreas involved in Homeostasis?

A

Can increase / decrease amount of glucose in blood (internal)

28
Q

How are the kidneys involved in Homeostasis?

A

Can control amount of water in blood (internal)

29
Q

How do thyroid hormones influence the metabolic rate ? (2)

A
  • by stimulating almost every tissue in the body to produce proteins
  • by increasing the amount of oxygen that cells use
30
Q

Uterine lining

A

Builds up each month to prepare for a fertilised egg

31
Q

Fimbriae

A

Catch the released egg and move it down the fallopian tubes

32
Q

Cervix

A

Directs sperm into the uterus, allows flow of menstrual blood from uterus to vagina, and closes the entrance to uterus during pregnancy

33
Q

Vagina

A

Receives the penis during intercourses, acts as a birth canal during birth

34
Q

Uterus

A

Nurturing the fertilised ovum as it develops into a foetus until birth, muscular organ that contracts during childbirth

35
Q

Ovary

A

Contains the eggs which a female is born with, gland with secretes oestrogen and progesterone

36
Q

Uterine wall

A

Muscular wall to help push the baby out during childbirth

37
Q

Fallopian tube

A

Transports egg from ovary to uterus each month

38
Q

When does menstruation occur?

A

Between day 1 and 4

39
Q

When does the lining of the uterus build up?

A

Between day 4 and 14

40
Q

When is the lining maintained

A

Between day 14 and 28

41
Q

When does the lining of the uterus break down

A

Day 28

42
Q

Shoots are ….. phototropic and …….. gravitropic

A

Positively
Negatively

43
Q

Roots are ….. phototropic and …….. gravitropic

A

Negatively
Positively

44
Q

Which plant hormone is used to grow cuttings?

A

Rooting powder containing auxin stimulate root growth

45
Q

Which plant hormone is used in tissue culture?

A

Auxin is added to induce the cluster to develop a shoot and root

46
Q

Which plant hormone is used to kill weeds?

A

Auxin is used to grow the weeds too quickly so they are unable to sustain the high growth rate, causing them to die

47
Q

Which plant hormone is used to ripen fruit

A

Ethene is sprayed on the fruit to encourage it to ripen

48
Q

Which plant hormone is used to control seed dormancy?

A

Gibberellins

49
Q

Which plant hormone is used to grow seedless fruit?

A

Gibberellins can be sprayed to stimulate fruit growth

50
Q

What hormone stimulates the ovaries to produce oestrogen ?

A

FSH stimulates the ovaries to produce oestrogen

FSH

51
Q

What happens as oestrogen levels rise?

A

As oestrogen levels rise they inhibit FSH, prevents more than one egg maturing

52
Q

What does oestrogen stimulate?

A

The pituitary gland to release LH

53
Q

What inhibits LH?

A

Progesterone

B3 (1 decks)

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