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Biology GCSE > Topic 7 > Flashcards

Topic 7 Flashcards

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1
Q

Where are hormones produced

A

Endocrine glands

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2
Q

How hormones go around body

A

Release into blood
Travel to target organs
Target organs respond

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3
Q

Adrenaline

A

Brings about fight or flight due to stress

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4
Q

Impacts of adrenaline

A

Increase HR
blood pressure
Blood flow
(All for oxygen flow)

Increase blood sugar levels

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5
Q

What does thyroxine do

A

Control metabolic rate

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6
Q

What is negative feedback

A

Restoring to normal level

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7
Q

What is metabolic rate

A

Rate at which cells respire or of energy transfers in body

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8
Q

Explanation of negative feedback of thyroxine

A

If too low, TRH from hypothalamus

Too high, inhibit TRH

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9
Q

MENSTRUAL CYCLE

A

Write out

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10
Q

2 types of contraception

A

Hormonal

Barrier methods

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11
Q

Hormonal contraceptives

A

Oestrogen or progesterone

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12
Q

Advantage and disadvantage of hormonal contraceptives

A

More effective than barrier

Doesn’t protect STI’s

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13
Q

2 examples of assisted reproductive therapy

A

Clomifene

IVF

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14
Q

What is clomifene

A

A fertility drug causing FSH and LH to stimulate eggs

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15
Q

What is IVF

A

1) fertility drug
2) eggs taken from ovaries
3) egged mixed with sperm
4) fertilised into embryos
5) place into womb

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16
Q

What is homeostasis

A

Maintains conditions at constant level in response to a change

17
Q

Osmoregulation

A

Control water levels to stop cells swelling or shrinking

18
Q

Thermoregulation

A

Keeps temp at 37

Hypothalamus triggers change in skin and muscle

19
Q

Impacts of thermoregulation

A 
Vasoconstriction 
Vasodilation
Sweat glands
Shivering
Erector muscles in body hair
20
Q

Blood glucose regulation

A

Insulin from pancreas

Glucagon

21
Q

What happens if rose in glucose

A

More insulin
Less glucagon
Liver and muscle cells remove glucose and store as glycogen

22
Q

What happens if decrease in glucose

A

Less insulin
More glucagon
Cause liver cells to convert glycogen to glucose and release to blood

23
Q

BMI calculation

A

Weight/height2

Biology GCSE (8 decks)

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