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12cells - Lecture 12 Cell Structure and Function Chapter 3...

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Lecture 12: Cell Structure and Function Chapter 3: Cellular Respiration
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The Big Picture How do mitochondria act as the “powerhouse of the cell” ? Cellular metabolism and respiration
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The Mitochondrion Why do we use the word “powerhouse” ? Power plants burn fuel to produce energy Mitochondria break down glucose into ATP
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Cellular Respiration Mitochondria use up oxygen while they break down glucose molecules Generate carbon dioxide as a waste product when producing ATP
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Two Organelle Membranes Outer membrane round and smooth to give bean-like shape Inner membrane folded to make shelves that project inward called cristae
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Gooey Insides Intermembrane space: between inner and outer membranes Matrix: central core of mitochondria Gel-like fluid containing many enzymes
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Assembly Line Enzymes line up on the shelves Work like an assembly line to break down glucose in steps along the cristae
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Mitochondrial DNA! Mitochondria have their own separate DNA and they reproduce themselves All mitochondria come from mother’s egg cell!
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