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RGS Fourth Form Biology > Hormones > Flashcards

Hormones Flashcards

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1
Q

Role of Insulin

A

Regulate blood sugar levels

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2
Q

Source of Insulin

A

Pancreas

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3
Q

Effect of Insulin

A

stimulates the liver and muscles to turn glucose into glycogen

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4
Q

Role of Adrenaline

A

Readies the body for flight or flight response

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5
Q

Source of Adrenaline

A

Adrenal Gland (above the kidneys)

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6
Q

Effect of adrenaline

A

Increase of heart rate and breathing rate, increases sugar level in blood and redirects blood flow to muscles and heart (away from digestive system)

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7
Q

Role of Testosterone

A

Main male sex hormone

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8
Q

source of Testosterone

A

Testes

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9
Q

Effect of Testosterone

A

Promotes Male secondary sexual characteristics

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10
Q

Role of Progesterone

A

Control of menstrual cycle and Support Pregnancy

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11
Q

source of progesterone

A

Ovaries

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12
Q

Effect of Progesterone

A

Maintains lining of uterus

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13
Q

Role of Oestrogen

A

Main Female sexual hormone

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14
Q

Source of Oestrogen

A

Ovaries

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15
Q

Effect of Oestrogen

A

Controls menstrual cycle (inhibits FSH production and causes uterus lining to thicken) and promotes Female secondary sexual characteristics

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16
Q

Do roots have a negative or positive geotropic response, explain why?

A

Positive, because they grown down (with gravity), to ensure the plant is anchored in the soil

17
Q

Do shoots have a negative or positive geotropic response, explain why?

A

Negative, they grow upwards (away from gravity), to ensure the leaves are exposed to light

18
Q

Do shoots have have a negative or positive phototropic response, explain why?

A

Positive, they grow towards the light, to maximise the exposure of leaves to Iight for photosynthesis

19
Q

What is a hormone?

A

Chemical messenger, controls a response in a particular tissue or organ

20
Q

What is the name of a structure which produces and releases a hormone?

A

(endocrine) gland

21
Q

How are hormones transported to their target hormones?

A

in the blood

22
Q

What hormone is released in the growing tips of plants, and brings about tropic responses?

A

auxin

23
Q

Where does auxin accumulate in a shoot?

A

shaded side of the shoot

24
Q

What effect does auxin have on the cells in a shoot?

A

causes more rapid cell elongation on shaded side, so shoot bends towards the light

RGS Fourth Form Biology (15 decks)

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