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Biology Paper 2 > B5 > Flashcards

B5 Flashcards

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1
Q

What is negative feedback?

A

Negative feedback is the process by which optimal conditions are returned after a stimuli and is used in homeostasis

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2
Q

What 3 things make up the nervous system?

A

Brain, Spinal Chord and neurones (nerve cells)

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3
Q

What is the function of neurones?

A

To carry electrical impulses between, and receptors, CNS and effectors

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4
Q

What are neurotransmitters?

A

Chemicals that diffuse across the synapse and bind to receptors on the next neurone

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5
Q

What two factors can decrease reaction time?

A

Caffeine
Exercise

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6
Q

What does Ethene do?

A

Gas that controls cell division and ripening of fruits

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7
Q

What dies Auxin do?

A

Changes the direction roots grow in to move towards or away from a stimulus

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8
Q

What are responses to stimuli involving directional growth called?

A

Tropisms
Phototropism
Gravitropism or Geotropism

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9
Q

What do Gibberellins do?

A

Stimulate seed germination (sprouting process)

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10
Q

What is Deamination?

A

Process undergone by excess amino acids
Waste product is ammonia

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11
Q

What are Nephron

A

Small structures that are a functional part of the Kidney

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12
Q

What are the two parts of Urine Production?

A

Ultrafiltration
Selective reabsorption

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13
Q

What are immunosuppressant drugs?

A

Drugs which prevent the immune system from destroying foreign cells of the transplanted kidney

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14
Q

What is the Endocrine system?

A

Made up of glands that release hormones which are transported through the bloodstream
Helps with Growth
Releases hormones

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15
Q

3 Contraceptive Options

A

Contraceptive Patch
Contraceptive implants (lasts 3 years)
Contraceptive injection (last 3 months)

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16
Q

Other contraceptive Methods?

A

Diaphragms (tampon)
IUD’s (T-shaped)

17
Q

Examples of STI’s

A

Chlamydia
Gonorrhea
HIV

18
Q

Ads of IVF

A

Chance to start a family even if you cannot conceive naturally

19
Q

Dis of IVF

A

Expensive
Multiple Pregnancy’s
Success rate is low

20
Q

What is Myopia?

A

Light focusses in front of retina
Short Sightedness

21
Q

What is Hyperopia?

A

Rays of Light focus behind the retina
Long Sightedness

22
Q

What is the Pill and Combined Pill

A

Pill contains Progesterone
Combined Pill contains both Progesterone and Oestrogen

23
Q

Plant Growth Practical

A

10 Cress seeds into 3 different petri dishes
Lined with moist filter paper
Shine light directly above one and from different directions for the other two
Leave for 1 week
Seeds grow towards the the light

Biology Paper 2 (5 decks)

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