Multiple Choice
Which structures in the electron transport chain are primarily responsible for producing ATP?
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3. Energy & Cell Processes
Introduction to Cellular Respiration
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is produced by the liver and used as an energy source when glucose is not readily available?
A
Ketone bodies
B
Lactic acid
C
Glycogen
D
Insulin
Verified step by step guidance1
Understand the role of the liver in metabolism: The liver is a key organ in regulating energy sources in the body, especially during fasting or low carbohydrate intake.
Identify the process of ketogenesis: When glucose is scarce, the liver converts fatty acids into ketone bodies through a process called ketogenesis. This occurs primarily in the mitochondria of liver cells.
Recognize the types of ketone bodies: The main ketone bodies produced are acetoacetate, beta-hydroxybutyrate, and acetone. These can be used by various tissues, including the brain, as an alternative energy source.
Differentiate between ketone bodies and other substances: Lactic acid is produced during anaerobic respiration, glycogen is a stored form of glucose, and insulin is a hormone regulating blood glucose levels. None of these are produced by the liver as an alternative energy source when glucose is low.
Conclude the liver's role in energy production: During periods of low glucose availability, the liver's production of ketone bodies is crucial for maintaining energy supply to vital organs.
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