Acute kidney tubular necrosis is caused when blood cannot reach the tissues and cells of the kidneys due to a blockage or restriction. This causes damage. Acute kidney tubular necrosis is caused when blood cannot reach the tissues and cells of the kidneys due to a blockage or restriction.
Free ribosomes freely float in the cytoplasm of the cell and the membrane-bound ribosomes bind to the nuclear membrane or to the endoplasmic reticulum. Ribosome function is vital for the production of proteins, or polypeptide chains, from the mRNA.
1 Plasma membrane, nucleus, nucleolus and mitochondria are also included in the structure of a plant cell. The endoplasmic reticulum, Golgi apparatus and microtubules are other features of the plant cell.  Both plant and animal cells include nucleus, cell membrane and mitochondria, which are part of their structure.