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Human Biology: Explain The Process Of Cellular Respiration In Order

1042 Words5 Pages

Gina Valerio
April 18, 2017
Human Biology Assignment

1. Explain the process of Cellular Respiration in order. Where does each step occur in a cell, which steps require oxygen, and how many ATP are produced in each step?

The process of cellular respiration occurs in three stages. The first stage is glycosis, in which oxygen and glucose enter the cell. Glucose provides energy for the cell. This occurs in the cytoplasm, produces two ATP, and does not require oxygen. Following glycosis next is the citric acid cycle. This stage occurs in the mitochondria, and produces two ATP and carbon dioxide. This step does not require oxygen. The last step that takes place is electron transport. This also occurs in the mitochondria. It produces thirty-two …show more content…

The major functions of mitosis are to repair and replace cells, and to maintain growth and development. Mitosis is frequently known for cell division and reproduction, while cancer is known to be a process of uncontrollable cell division. During mitosis, before progression through the next stage of the cell cycle, cells need to safely pass checkpoints to ensure that the DNA is ready for replication. If the DNA is damaged, apoptosis will occur and the cells will kill themselves off. Unfortunately for cancer these cells do not die off, and they bypass all of the checkpoints. They ignore the inhibitory signals from nearby cells that tell them to stop dividing. The result of the rapid division causes cells to form tumors, which will then lose all function and the genes will become abnormal. If further additional changes happen to the cells, metastasis will occur and the cancer can spread to another organ of the body. The process of metastasis involves the cells breaking away from the main tumor via traveling through the blood or lymph nodes, and then developing in new places. Eventually, that type of cancer dominates over all functions of the organs, tissues, and organ

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