Answer:
12 chromosomes
Explanation:
In mitosis the daughter cells finish up with exactly the same number of chromosomes as the parent cell. This is called the diploid condition where the nucleus of each cell contains a pair of each type of chromosome.
The sister chromatids of each chromosome separate at the centromere forming two distinct daughter cells. The eukaryote has 12 chromosomes and exists in diploid state therefore after mitosis, the number of chromosomes will be retained as that of the parent.
I think the correct answer would be HIV infections. Vaccines of such infection are recently discovered and there are already trials done to a number of people. With the aid of this, there would surely be a decrease in the number of people who would have HIV.
Connective tissue supports the framework of the liver, and epithelial tissue protects the liver. Connective tissue holds the liver in place during movement, and epithelial tissue forms the lining of the liver. Connective tissues are mainly used in forming support networks within tissues and Epithelial tissue tend to line the organs and form protective cell layers.
Answer:
Excitation-contraction coupling
Explanation:
The T-tubules are located between the terminal cistern adjacent to the RS, forming a triad consisting of two terminal cisterns and the T-tubule. The RS-tubule-T junctions and their associations with myofibrils develop in a series of consecutive steps, where the formation of junctions between the two membrane systems is done concurrently, initiating molecular changes in both membrane systems.
When the potential for nervous action reaches the muscular membrane, it undergoes depolarization that is transmitted to the depths of the cell by the membranes of the tubular-T system. When the action potential of the tubules is detected by a dihydropyridine receptor located at the junction of the tubule with the sarcoplasmic reticulum cistern, a mechanism not yet elucidated produces the opening of the receptors to ryanodine, which function as channels for the calcium. When these channels open, as the concentration of calcium ions within the RS is much higher than in the cell's cytosol, these ions leave their deposit to begin the process of interaction between thick and thin filaments, muscle contraction.
This series of events is called the '<u>excitation-contraction coupling</u>' (e-c) and several proteins specifically located in the RS-tubule-T junction have essential roles in them. The dihydropyridine receptor (DHPR) in the T-tubule detects the voltage across the membrane and its activation causes the release of Ca2 + from the RS, while the RyR / Ca2 + release channel is located in the junction RS and is responsible for the release of Ca2 + from its storage locations. Both RyR and DHPR are necessary for proper muscle development, although none of them are necessary for T-RS anchoring or the search and / or association of CLQ and tradin in the binding RS.
unsaturated fat is a fat or fatty acid in which there is at least one double bond within the fatty acid chain.