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Questions and Answers
Which enzymes regulate the Glycolysis pathway?
Which enzymes regulate the Glycolysis pathway?
- Hexokinase, Phosphofructokinase & Pyruvate Kinase (correct)
- Amylase, Lipase & Protease
- Catalase, Peroxidase & Ribonuclease
- Sucrase, Maltase & Lactase
What are the two types of control mechanisms mentioned in the text for metabolic pathways?
What are the two types of control mechanisms mentioned in the text for metabolic pathways?
- Micro control and Macro control
- Internal control and External control
- Cellular control and Tissue control
- Local control and Global control (correct)
Which tissues are mentioned as sites where local control of metabolism occurs?
Which tissues are mentioned as sites where local control of metabolism occurs?
- Brain and Liver
- Kidneys and Lungs
- Muscle and RBCs (correct)
- Heart and Stomach
What is the major role of liver cells in metabolism?
What is the major role of liver cells in metabolism?
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Which type of control involves hormone-activated signal cascades?
Which type of control involves hormone-activated signal cascades?
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Study Notes
Regulation of Glycolysis Pathway
- The Glycolysis pathway is regulated by control of three enzymes: Hexokinase, Phosphofructokinase, and Pyruvate Kinase.
Local Control of Metabolism
- Local control of metabolism involves regulatory effects of varied concentrations of pathway substrates or intermediates, benefiting the cell itself.
- This type of control occurs in extrahepatic tissues, such as muscle and red blood cells (RBCs).
Global Control of Metabolism
- Global control of metabolism benefits the whole organism and often involves hormone-activated signal cascades.
- The liver has a major role in global control, particularly in maintaining blood levels of various nutrients, including glucose.
- Hepatocytes (liver cells) have key roles in metabolism, with a focus on maintaining whole-body homeostasis.
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