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Why is the placenta not an effective barrier against substances that harm the fetus?
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The blood-brain barrier is effective against the passage of?
The blood-brain barrier is effective against the passage of ? Metabolic waste such as urea
The blood brain barrier is effective against the passage of?
The blood-brain barrier is effective against the passage of ? Metabolic waste such as urea
What is the blood brain barrier is effective against?
The blood brain barrier is effective again harmful chemicals in the blood and bacteria infections from reaching the brain. Many of the drugs on the street breach this barrier. K12 or bath salts is a very good example of the damage breaching this barrier can cause.
How can inflammation of the brain cause the blood-brain barrier to malfunction?
Inflammation may cause the blood-brain barrier to become less effective at preventing the passage of toxic substances into brain tissue.
Is stomach acid or mucus a barrier to infection that is most effective against cholera bacteria?
i think it is stomach acid
Which antibodies can cross placental barrier?
IgG is the only antibody small enough to cross he placenta.
Is the Thames Barrier effective?
The thames barrier is effective beacause it prevents floods and storms to affect London city.
What is the composition of galvanized pipe?
Galvanized pipe has been coated with a layer of zinc. The zinc provides a barrier against corrosion so that the pipe may be exposed to the outdoor environmental elements. The protective barrier proves equally effective against damage from indoor humidity
A barrier that allows some substances in while keeping other substances out is said to be?
Semipermeable membrane.
What protects the CNS from harmful substances and pathogens by preventing passage of these substances from blood into the interstitial fluid of brain tissue?
You're referring to the blood-brain barrier.
What is the main function of the placenta?
The placenta has several functions in development of the human embryo. # It is an endocrine organ, i.e an organ which secretes hormones from endocrine glands which are ductless. # It is involved in the exchange of substances between the maternal and fetal circulation, e.g. glucose, water, inorganic ions, antibodies, fatty acids, amino acids, etc. # It acts as a barrier bwtween the fetal and maternal circulation for the following reasons - firstly because the mother may have a different blood type to the fetus (i.e. Rhesus Negative when the baby is Rhesus positive) and this stops her from mounting an immune response against the fetus. Secondly because the higher blood pressure of the mother would damage the fetal capillaries, which are very fragile if the placenta wasn't there to act as a barrier. # The blood flow in maternal and fetal capillaries in the placenta is counter-current, in other words they flow in opposite directions, maximising the concentration gradient between them, which is essential for transport of substances by the mechanism of diffusion (e.g. of waste gases like CO2) and facilitated diffusion (e.g of glucose)
Can cultural differences be a barrier to effective communication?
yes
