Barrier

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Related to placental barrier: Blood brain barrier

Barrier

1. See: Trade barrier.

2. See: Barrier Option.
References in periodicals archive ?
Meanwhile, 62 genes were identified with cell adhesion-related terms relating to GO "biological process" categories (Table 1) that are likely to play important roles in maintaining the integrity of the placental barrier [22, 23].
In a study that evaluated endocrine disruptors, heavy metals are cited as substances capable of crossing the placental barrier and accumulating in breast milk (Bila & Dezotti, 2007).
Along with nutrients and oxygen, caffeine passes across the placental barrier but is not easily inactivated by the developing foetus.
"Mercury emits vapors that are colorless and odorless, which when inhaled, is absorbed into the bloodstream and cross the blood-brain and placental barrier. More often than not, human exposure to mercury occurs at such a low level that is ignored and forgotten," he said.
Due to morphine cationic lipophilic property, it easily crosses the placental barrier and causes many defects on the embryonic and neural tube development and cerebellum as well [5, 6].
It is a pregnancy category-B drug, capable of crossing the placental barrier and has the potential to cause hypersensitivity reaction.8
t sy n At the scientists did not believe drug taken by a woman could pass across placental barrier the developing foetus.
Alcohol crosses the placental barrier and can stunt foetal growth.
It readily passes both the placental barrier and the blood-brain barrier, therefore exposures during pregnancy are of highest concern.
For example, the safety of many substances is the result of the substances not being absorbed in the intestine or prohibited from traversing conventional barriers such as the blood‐brain barrier, placental barrier, gonadal barrier, etc.