Following your meal, glucose, and amino acids are absorbed through the cells of
ID: 183187 • Letter: F
Question
Following your meal, glucose, and amino acids are absorbed through the cells of your Gl tract and will enter a vein, which drains into your liver. There, the heptaocytes (liver cells) serve to process the macronutrients that are not immediately required for either short or long term energy storage, in addition they detoxify any potentially harmful substances absorbed through the Gl tract. Question 19 (1 point) Within an individual hepatocyte, the rough endoplasmic reticulum is situated in close proximity to the nucleus. Why would this be advantageous? Because the hepatocytes need a large area of cytoplasm to be free of organelles for storage of glucose It is not advantageous; it is an evolutionary by-product Because the cell needs to compartmentalize organelles away from the detoxifying region, so as not to destroy itself Because DNA within the nucleus contains the code for making proteins, and the rough endoplasmic reticulum is the site of protein synthesisExplanation / Answer
ANSWER: Because DNA within the nucleus contains the code for making proteins and the rough endoplasmic reticulum is the site of protein synthesis.
The rough endoplasmic reticulum has its rough appearance, so the ribosomes are attached to its outer (cytoplasmic) surface. Rough ER lies in close proximity with the cell nucleus, due to which the membrane of rough endoplasmic reticulum is continuous with the outer membrane of the nuclear envelope. The ribosomes on rough ER have the function of protein synthesis that possess a signal sequence that directs them specifically to the ER for processing. Thus it is advantageous.