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Biology Obied > LOOK OVER THS > Flashcards

LOOK OVER THS Flashcards

1
Q

LOOK AT A BRAIN DIAGRAM

A

NOW

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2
Q

LOOK AT AN EYE DIAGRAM

A

NOW

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3
Q

What does the medulla do?

A

Controls unconscious activities like breathing and heart rate.

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4
Q

What does the hypothalamus do?

A

Maintains body temperature and produces hormones that control the pituitary gland

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5
Q

What does the cerebrum do?

A

Controls memory,consciousness,language and intelligence

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6
Q

What does the cerebellum do?

A

Responsible for muscle coordination

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7
Q

What does the pituitary gland do?

A

Produces many important hormones ( some involved in menstrual cycle)

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8
Q

Why does the pituitary gland work with in the brain?

A

The hypothalamus

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9
Q

What is the role of the cornea?

A

Refracts light into the eye

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10
Q

What is the role of the iris?

A

Controls how much light enters the pupil ( the hole in the middle)

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11
Q

What is the role of the lens?

A

Refracts light as well as the cornea and focuses it into the retina

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12
Q

What is the retina?

A

The light sensitive part and its covered in receptors called rods and cones which detect light

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13
Q

What type of light are rods in the eye sensitive to?

A

Rods are more sensitive in dim light but cant sense colour

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14
Q

What type of light are cones in the eye sensitive to?

A

Cones are sensitive to different colours but are not so good in dim light

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15
Q

What is the role of the optic nerve?

A

Carries impulses from the retinas receptors to the brain.

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16
Q

What is adrenaline?

A

A hormone released by the body that prepares the body for ‘fight or flight’

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17
Q

What gland produces adrenaline?

A

The adrenal gland

18
Q

How does the body control the levels of hormones in the body?

A

Negative feedback system

19
Q

What is thyroxine and what produces it?

A

A hormone released by the thyroid gland and it regulates the metabolic rate of the body.

20
Q

What is testosterone?

A

The main male sex hormone. It stimulates sperm production.

21
Q

Where is testosterone produced?

A

The testes

22
Q

What is oestrogen?

A

The main female sex hormone that is involved in the menstrual cycle and promotes female sexual characteristics

23
Q

Where is oestrogen produced?

A

The ovaries

24
Q

What is progesterone?

A

A hormone produced by the ovaries that helps to support pregnancy

25
Q

What is FSH? And what does it stand for

A
  • Follicle Stimulating Hormone

- Helps to control the menstrual cycle

26
Q

What is LH? What does it stand for?

A
  • Luteinising hormone

- Hormone that helps control the menstrual cycle

27
Q

What gland produces LH?

A

The pituitary gland

28
Q

What is FSHs role in the menstrual cycle?

A

Causes the egg to mature in on of the ovaries and stimulates the production of oestrogen.

29
Q

What is oestrogens role in the menstrual cycle?

A
  • Causes the lining of the uterus to thicken and grow.
  • Stimulates production of LH
  • Inhibits the production of FSH (so that one egg is released by cycle)
30
Q

What is the role of LH in the menstrual cycle?

A
  • Stimulates the release of an egg at day 14

- Indirectly stimulates progestrone production

31
Q

What is the role of progesterone in the menstrual cycle?

A
  • Maintains the lining of the uterus

- Inhibits production of FSH and LH

32
Q

Name 3 types of contraception that effects progesterone.

A

ANY THREE OF:

  • Implants
  • Injection
  • Mini pill
  • IUS (Intrauterine system)
33
Q

Name a contraception method that effects Progesterone AND oestrogen

A

ANY ONE OF:

  • Combined pill
  • Patch
34
Q

Name a barrier contraception method and how effective it is (%)

A

ANY ONE OF:

  • Condom (98%)
  • Female condom (95%)
  • Diaphragm (92-96%)
35
Q

What are auxins?

A

A plant hormone that controls growth at the tips of roots and shoots.

36
Q

Are shoots positively or negatively phototrophic?

A

Positively

37
Q

Are roots positively or negatively phototrophic?

A

Negatively

38
Q

What is gibberellin?

A

A plant hormone that stimulates seed germination, stem growth and flowering

39
Q

How does gibberellin stimulate stem growth?

A

Stem elongation

40
Q

What is ethene?

A

It is a plant hormone that is produced by aging leaves. It stimulates cells that connect the leaf to the rest of the plant. It also releases enzymes that help ripen fruit

Biology Obied (6 decks)

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