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It is a peculiarity of the cardiac circulation that there are channels that pass from coronary arterioles, from the capillary bed, and from the cardiac veins directly into the lumen of the heart. Irregular thin-walled channels of larger than capillary size, which are called "myocardial sinusoids," also receive blood from the coronary arterioles or the capillary bed and communicate with the smallest cardiac veins that open directly into the chambers of the heart, particularly into the atria. It has been assumed that the stream in these veins can be reversed and thus help in nourishing the ischemic myocardium in case of coronary obstruction. Some of these openings in the cardiac cavity can be seen with naked eye by inspection of the endocardial lining. They vary from pinpoint size to almost 1 mm in diameter.
Primary transcripts produced by RNA polymerases are generally faithful copies of the DNA template. However, most final/functional forms of these RNAs vary substantially from the primary transcript.Give an instance of an RNA class.
find if the individual had been exposed to this disease.
A mammal uses only 1 to 2 percent of its energy in ventilation while a fish must spend about 15 percent of its energy to move water over its gills. Describe this huge difference in their efforts to collect oxygen.
Which condition is best described while the ovaries shut down their production of eggs and hormones like estrogens and progesterone approximately 30 years after they started.
Why is energy from fusion reactors, dissimilar that from fission reactors, so attractive from an environmental perspective. Consider the HIV enzyme called protease. The amino acid residues at the active site are highly hydrophobic.
In pea plants, genes A,B,C,D and E are located on separate chromosomes, A plant with genotype AABBccDDee is mated with a plant with genotyoe AAbbCCDDEE.
If I wanted to test the drug to see if it made mice run faster, how could I test that and what would be my control?
describe the processes and stages of human embryogenesis.What factors will disrupt this normal growth and cause problems?
What is the connection among ribosomes, endoplasmic reticulum, golgi apparatus and the plasma membrane? How do they work together in the system.
You are studying 2 wetlands in eastern Ohio - one that has become highly invaded by purple loosestrife. These wetlands typically contain over one hundred species.
Discuss how do you counter the same person who says that if the process does occur in nature, there is no such thing as natural selection, but it requires a designer to carry out those specific steps?
Map of the Drosophila melanogaster X chromosome given, Assume that a female is heterozygous for an inversion of the exact entire region from v to wy.
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