Answer:
Mitosis is the biological process by which cell division occurs
Explanation:
-in interphase the nucleolus and its cell membrane are differentiated, and the chromosomes are in the form of chromatin
- in prophase the chromosomes are condensed, and the chromatin is no longer visible
-in <em>metaphase</em> the rolled chromosomes each with their chromatids line up in the metaphase plate
in anaphase the chromatids of each chromosome separate and move towards the poles
in telophase the chromosomes are in each pole, the cell membrane forms again and the cytoplasm is divided.
Finally in cytokinesis cell division is completed
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:
Electron microscopes differ from light microscopes in that they produce an image of a specimen by using a beam of electrons rather than a beam of light. Electrons have much a shorter wavelength than visible light, and this allows electron microscopes to produce higher-resolution images than standard light microscopes.
Explanation:
hope this helps!
Answer:
Due to the density, it should sink further down.
Explanation: