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In prophase of mitosis, specialized regions on centromeres called kinetochores attach chromosomes to spindle fibers. The centromere links a pair of sister chromatids together during cell division. This constricted region of chromosome connects the sister chromatids, creating a short arm (p) and a long arm (q) on the chromatids.
The vessels that remove the deoxygenated blood from the heart muscle are the cardiac veins. These include the great cardiac vein, the middle cardiac vein, the small cardiac vein, the smallest cardiac veins, and the anterior cardiac veins. Cardiac veins carry blood with a poor level of oxygen, from the myocardium to the right atrium.
The bundle of His (BH) [1]: 58 or His bundle (HB) [1]: 232 (/ h ɪ s / "hiss" [2]) is a collection of heart muscle cells specialized for electrical conduction.As part of the electrical conduction system of the heart, it transmits the electrical impulses from the atrioventricular node (located between the atria and the ventricles) to the point of the apex of the fascicular branches via the ...
The cardiac conduction system (CCS, also called the electrical conduction system of the heart) [1] transmits the signals generated by the sinoatrial node – the heart's pacemaker, to cause the heart muscle to contract, and pump blood through the body's circulatory system.
The arrangement of chromatin within the nucleus may also play a role in nuclear stress and restoring nuclear membrane deformation by mechanical stress. When chromatin is condensed, the nucleus becomes more rigid. When chromatin is decondensed, the nucleus becomes more elastic with less force exerted on the inner nuclear membrane. This ...
chromatin immunoprecipitation (ChIP) chromocenter A central amorphous mass of polytene chromosomes found in the nuclei of cells of the salivary glands in Drosophila larvae and resulting from the fusion of heterochromatic regions surrounding the centromeres of the somatically paired chromosomes, with the distal euchromatic arms radiating outward ...
5- Allergy Placemats. If you have kids making sure no one gives them food they cannot have due to food allergens. Watching over them is a full time job at gatherings and parties with food.
Chromatin diminution (founding father: Theodor Boveri). In this process, found in some copepods and roundworms such as Ascaris suum , portions of the chromosomes are cast away in particular cells. This process is a carefully organised genome rearrangement where new telomeres are constructed and certain heterochromatin regions are lost.