Take a look at the pictures below. The black and white one shows the "basic" levels, which the colorful one goes a bit deeper.
I hope that helps! :)
The correct option is A.
The use of antibacterial drugs can cause modifications in the genetic material of the concerned bacteria. If the genetic material of the bacteria are modify, that means they have undergone mutation. Because the base sequence of the normal and that of the mutated gene is different, antibiotic will not be able to recognize the bacteria again and thus will not be able to attack it.
Answer:
B. atrioventricular (AV) valve
Explanation:
The function of the conduction system of the heart is to spread the electric signal and make the heart contract in coordinated timing. Conduction starts at SA node, then the AV node then will spread by bundle branches.
The atrioventricular valve is not part of the conduction system. The valve function is to keep the blood flow back. If the valve is broken and blood did flow back, it can make the heart need to do more work than usual.
Is there a multiple choice? It will be easier for me to answer it to you that way.
Answer:
Función. Las células de Schwann funcionan como aislante eléctrico, mediante la mielina. Este aislante, que envuelve al axón, provoca que la señal eléctrica lo recorra sin perder la intensidad, facilitando que se produzca la denominada conducción . saltatoria.
