embryo

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  • Created by: Gemma
  • Created on: 28-05-14 10:37
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:) of embryonic stem cells
Easy to grow + extract
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:( of embryonic stem cells
ethical issues - potential source of life+ so wrong in killing life, possible rejection by patients body, risk of infection when cells are received, risk of stem cells becoming cancerous in body
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:) Adult stem cells - e.g. bone marrow
fewer ethical issues than embryonic, rejection risk avoided if stem cells taken from the patient
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:( Adult stem cells
Difficult to extract, more difficult to produce different cell types, risk of rejection when cells are extracted + received
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:) Fused cells - therapeutic cloning
Rejection risk avoided if nucleus taken from patient, potential for treating genetic disorders
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Sources of stem cells?
cord blood/umbilical cord/placenta, fertilised egg/zygote/blastocyst/embryo - early, bone marrow, brain/connective/skin/liver cells, addition of adult nucleus to enucleated egg cell
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How can stem cells be used
treat medical conditions where there is a loss, shortage/reduced functioning of certain cell types
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Parkinsons' disease
progressive loss of nerve cells in the brain that are involved in muscle control
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Multiple sclerosis
Electrical inslutating layer surrounding nerve cells breakdown
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Type 1 diabetes
caused when cells in the pancreas produce less than the normal level of insulin in response to a rise in blood glucose concentration
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Burns
skin cells are damaged + so cant be replaced
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Why are regulatory authorities for embryo research needed?
Decide on max age of embryo allowed for research, considering ethical/legal aspects/judging what is acceptable/checking source of stem cells is acceptable, stopping of cloning of humans
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Why people who are involved in embryo research are in regulating authorities
being able to fully understand science/recognise possible benefits + risks
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Why people who aren't involved in embryo research are in regulating authorities
giving a balance/alternative/wider view
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Card 2

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:) of embryonic stem cells

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Easy to grow + extract

Card 3

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:( of embryonic stem cells

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Card 4

Front

:) Adult stem cells - e.g. bone marrow

Back

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Card 5

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:( Adult stem cells

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