Answer:
Those capillaries that have endothelial cells tightly attached have an increase in cell-to-cell junctions, such as desmosomal junctions that are poorly permeable to substances.
These capillaries generally function as conductors or collectors and not as permeabilizers like the pulmonary capillaries that are fenestrated and allow a high passage of substances and gases.
The capillaries are waterproof and prevent the passage of substances or fluids such as in the blood-brain barrier that is very selective
Explanation:
The blood-brain barrier is too selective since it is not favorable for the organism that many fluids, drugs, substances or chemical compounds enter the brain space.
This is the reason why the vessels are waterproof and why pharmacology was challenged to invent drugs that could cross this barrier since it was considered impossible.
An example is dopamine, which in parkynson's disease the levo group is added to dopamine, thus forming levodopamine as a product, this is the only way that the drug crosses the blood-brain barrier and can pass the impermeable barrier generated by capillaries with endothelial cells that are close to each other or closely linked
Answer:
1 goes with b. 2 goes with a 3 goes withd 4 goeswith c
Explanation:
Recombination occurs when two molecus of dna exchange pieces of their genetic material with each other .
Step by step
Answer:
D.
Explanation:
People with younger individuals will experience great future growth.
The farmer can use variation in the height of the corn plants to cross them and produce taller corn plants. The farmer's work will be most effective if height is determined by codominance.
<h3>Codominance</h3>
Codominance refers to the fact that different alleles of a given gene locus can affect a phenotype.
The farmer's work will be most effective if height is determined by codominance because he/she will need to select hybrid plants in a generation to breed them.
The farmer can observe the proportion of taller offspring that are affected by the disease in order to analyze if heigh and disease resistance genes are linked.
If these genes are linked, then it is required to cross plants and then select recombinant offspring with desired features (in this case, taller and disease resistance plants).
Learn more about codominance here:
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