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MINE > bio paper 2 short QandA > Flashcards

bio paper 2 short QandA Flashcards

1
Q

internal conditions that need to be maintained

A

body temp
water content
blood glucose concentration

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2
Q

homeostasis

A

maintaining stable internal environment

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3
Q

what changes the shape of the lens by contracting or relaxing?

A

ciliary muscles

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4
Q

what refracts light onto the retina?

A

cornea and then the lens

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5
Q

cerebral cortex

A

control consciousness, intelligence, memory and language

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6
Q

medulla

A

controls unconscious activities- heartbeat and breathing

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7
Q

cerebellum

A

concerned with coordiantion of muscular activity

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8
Q

sensory neurone

A

carries impulse from receptors to CNS

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9
Q

relay neurone

A

link neurones in CNS

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10
Q

motor neurone

A

carries impulses from CNS to effetor

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11
Q

nervous system order

A

stimulus
receptors
coordinator
effector
response

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12
Q

FSH

A

pituatary gland- makes egg mature

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13
Q

Oestrogen

A

ovaries-stimulates lining of uterus to grow again

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14
Q

LH

A

pituitory gland- causes ovulation

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15
Q

Progesterone

A

ovaries- maintains lining of uterus

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16
Q

Progesterone inhibits or causes FSH production?

A

inhibits

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17
Q

Progesterone inhibits or causes LH production?

A

inhibits

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18
Q

Oestrogen inhibits or causes FSH production?

A

inhibits

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18
Q

close focus

A

lens is thicker so light is refracted more strongly

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19
Q

distance focus

A

lens is thinner so light only slightly refracted

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20
Q

if object is near then ciliary muscles…

A

contract

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21
Q

if object is far then ciliary muscles…

A

relax

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22
Q

if object is near then suspensory ligaments are…

A

slack

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23
Q

if object is far then suspensory ligaments are…

A

tight

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24
Q

near object means…

A

rounder/ flatter lens

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25
Q

far object means…

A

stretched/thinner lens

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26
Q

DNA bases pairing

A

A-T
C-G

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27
Q

vasodilation

A

body temp too high

28
Q

vasoconstriction

A

body temp too low

29
Q

hypertonic

A

more sat/less water on outside of cell

30
Q

isotonic

A

same salt/water inside and outside cell

31
Q

hypotonic

A

lower salt/ more water outside cell

32
Q

osmoregulation

A

regulation of water levels

33
Q

polydactyl

A

extra fingers/toes
dominant allele

34
Q

cystic fibrosis

A

mucus in air passages
recessive allele

35
Q

genotype

A

genetic makeup in a nucleus

36
Q

phenotype

A

characteristic caused by genotype

37
Q

homozygous

A

chromosome pair made of same alleles

38
Q

heterozygous

A

pair of chromosomes made of different alleles

39
Q

species

A

group of organisms that can interbreed to produce fertile offspring

40
Q

central nervous system

A

brain and spinal chord

41
Q

peripheral nervous system

A

connects CNS to rest of body

42
Q

phototropism

A

response to light

43
Q

geotropism

A

response to gravity

44
Q

hydrotropism

A

response to water

45
Q

posotive tropism

A

towards stimulus

46
Q

negative tropsim

A

away from stimulus

47
Q

What hormone is responsible for growth in plants?

A

auxin

48
Q

hyperopia

A

long sighted
cant see up close
rays meet behind retina

49
Q

myopia

A

short sighted
cant see far away
rays meet in front of retina

50
Q

type 2 diabetes

A

body stops responding to insulin

51
Q

type 1 diabetes

A

pancreas doesnt make enough insulin

52
Q

synapse

A

gap between neurones

53
Q

effectors

A

muscles or glands that bring about a response

54
Q

receptors

A

cells that detect change in environment

55
Q

nerve

A

bundle of neurones

56
Q

stimuli

A

changes in environment

57
Q

coordination centres

A

areas that receive and process information and coordinate a response

58
Q

where is the thermoregulatory centre?

A

hypothaloumus of the brain

59
Q

neurone pathway

A

stimulus
receptor
sensory neurone
CNS-relay neurone
motor neurone
effectors
response

60
Q

if light intensity low then..

A

pupil dilated
circular muscles relaxed
radial muscles contracted

61
Q

if light intensity high then

A

pupil constricted
circular muscles contracted
radial muscles relaxed

62
Q

iris

A

has sets of muscles that control the size of the pupil and regulate the light reaching the retina

63
Q

ciliary muscles ans suspensory ligaments

A

hold lens in place and allow focusing of the light onto the retina

64
Q

retina

A

stimulates light sensitive cells and sends nerve impulses

65
Q

optic nerve

A

carries impulses from retina to brain

66
Q

sclera

A

stops eyeball being easily damaged

67
Q
A

MINE (6 decks)

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