Answer:
the electrical impulses get sent through the conduction pathways which cause ventricles to contract and this allows heart to pump blood.
Explanation:
The electrical impulse starts in a small bundle of specialized cells located in the right atrium, called the SA node. The electrical activity spreads through the walls of the atria and causes them to contract. This forces blood into the ventricles.
And it should be understood that, an electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node). The electrical stimulus travels down through the conduction pathways and causes the heart's ventricles to contract and pump out blood.
Antlions are an insect under the order of Net-Winged insects, under the family of Myrmeleontidae. They dig pits to trap passing ants and other insect larvae, like caterpillars. They are carnivorous; more specifically, they are insectivores, in that they eat insects.
Answer:
The answer is D) Another biopsy from a distinct site may show a different result.
Explanation:
In molecular biology southern blot is used to detect a specific sequence of DNA. Mitochondria are energy producing organelles in the cell and they possess DNA that is inherited only from the mother. Although Southern blot is the classic method used to detect large deletions in mitochondrial DNA, it is not always sensitive enough to detect heteroplasmic deletions at low levels leading to results that are not always reliable. Heteroplasmy refers to the presence of more than one mitochondrial DNA in an individual. The presence of a mutation in the mitochondrial DNA can create an intracellular heteroplasmic mix of mutant and normal mitochondrial DNA. Cells with a higher rate of cell division like blood can yield inconclusive results in southern analysis because heteroplasmy favors wild type mitochondrial DNA. Thus, non-dividing cells such as muscle cells are preferred for the analysis.
