In an animal cell, the cytoplasm is a semi-liquid substance that holds all the cell's organelles except the nucleus. It also acts as a repository for amino acids, sugars and other important nutrients used in the regular life of the cell. Finally, the cytoplasm stores a cell's waste until it is flushed from the cell.
The cytoplasm comprises three main parts. The main part, which makes up more than 50 percent of a cell's volume, is the cytosol. This gel-like substance is composed of water, dissolved enzymes and salts. The second major component of the cytoplasm is the cell's organelles. These structures, such as the mitochondria, the endoplasmic reticulum and the Golgi apparatus, perform important metabolic and reproductive parts of the cell's life cycle. The organelles are suspended in the cytosol and get the nutrients that they need to perform their functions from that substance. Finally, the cytoplasm contains indissoluble elements, such as starches and lipid droplets, that help store important chemicals. Important cellular functions, such as cell division, glycolysis and protein synthesis, take place in the cytoplasm, and it is also host to the cytoskeleton, which provides structure to the animal cell. Unlike in plant cells, the cytoplasm in animal cells does not contain chloroplasts.Learn More
The stage of cellular transportation at which the most ATP is produced is during the electron transport chain. This stage produces a total of 32 ATP molecules for every glucose, according to the Indiana University Purdue University Indianapolis Department of Biology.Full Answer >
A bacterial infection within the middle ear is the most common cause of fluid in mastoid cells, according to WebMD. Mastoiditis occurs when too much fluid is found in mastoid air cells, which are honeycomb-like structures filled with air that drain into the middle ear. When the middle ear becomes infected, the inflammation may pass into the mastoid cells, causing fluid buildup in the mastoid bone.Full Answer >
The Calvin cycle takes place in the stroma of the chloroplast. Carbon dioxide enters the stroma of the chloroplast to combine with the five-carbon compound called ribulose1, 5-Biphosphate to form two molecules of a three-carbon compound called 3-Phosphoglyceric acid. This reaction is catalyzed by an enzyme called Ribulose bi-phosphate Carboxylase.Full Answer >
The nucleus of plant and animal cells contains chromosomes. A chromosome consists of protein and one molecule of deoxyribonucleic acid. DNA is responsible for passing along specific traits from one living organism to another.Full Answer >