The blood-brain barrier requires special transporters to move amino acids and vitamins into the brain.
- The BBB divides membrane transport proteins into two groups: uptake transporters and efflux transporters.
- Multiple uptake transporters at the BBB are in charge of moving solutes from the bloodstream into the endothelial cells, where they eventually pass through the basolateral membrane into the brain.
- Passive yet saturable GLUT1 transporters that are present in both the luminal and abluminal membranes of endothelial cells mediate glucose transport across the blood-brain barrier.
- Abstract. AATs are membrane-bound transport proteins that facilitate the entry and exit of amino acids from cells or cellular organelles. AATs play a variety of physiological roles in intracellular energy metabolism, anabolic and catabolic processes, acid-base balance, neurotransmission, and other areas.
To learn more about transporters.
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It is the manipulated variable. It is changed in an experiment to see how it would effect another variable.
Answer:
24%
Explanation:
The given genetic trait is homozygous recessive and the frequency of homozygous recessive genotypes in the population is 2%.
Therefore, frequency of homozygous recessive genotypes (q2) = 2% = 0.02
Frequency of homozygous recessive allele (q) = square root of 0.02 = 0.141
Since p+q =1 (here, p = frequency of dominant allele).
So, p= 1-q = 1-0.141 = 0.859
The frequency of heterozygous carrier genotypes in the population = 2pq = 2 x 0.141 x 0.859 = 0.24 or 24%
Depending on where the population is, natural selection varies. Hope this helps :-)
Answer:
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