Multiple Choice
In the diagram of a mitochondrion, the letter 'A' is most likely used to indicate which structure?
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11. Aerobic Respiration
Mitochondria
Multiple Choice
In a multicellular organism, which type of cell would be expected to contain the highest number of mitochondria due to its high ATP demand?
A
Cardiac muscle cell (cardiomyocyte)
B
Adipocyte (fat storage cell)
C
Goblet cell (mucus-secreting epithelial cell)
D
Red blood cell (erythrocyte)
Verified step by step guidance1
Understand the role of mitochondria: Mitochondria are the organelles responsible for producing ATP through cellular respiration, which provides energy for cellular activities.
Identify the energy demand of each cell type: Consider the primary function of each cell type and how much energy (ATP) it requires to perform its tasks.
Analyze the cardiac muscle cell (cardiomyocyte): These cells contract continuously to pump blood, requiring a large and constant supply of ATP, so they have many mitochondria.
Compare with other cell types: Adipocytes mainly store fat and have lower energy demands; goblet cells secrete mucus but do not require as much ATP; red blood cells lack mitochondria entirely as they rely on glycolysis.
Conclude that the cell type with the highest ATP demand, and thus the highest number of mitochondria, is the cardiac muscle cell (cardiomyocyte).
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