Podcast
Questions and Answers
What primarily occurs during the anabolism stage of metabolism?
What primarily occurs during the anabolism stage of metabolism?
- Synthesis of large molecules from smaller ones. (correct)
- Breakdown of complex structures into simpler ones.
- Oxidative breakdown of stage 2 products.
- Digestion of nutrients into absorbable units.
In which stage of metabolism does glycolysis, a major catabolic pathway, primarily occur?
In which stage of metabolism does glycolysis, a major catabolic pathway, primarily occur?
- Stage 3: Mitochondria.
- Stage 2: Tissue cells. (correct)
- Stage 1: Digestion and absorption in the GI tract.
- Glycolysis occurs equally in all three stages.
Which of the following best describes the primary role of cellular respiration?
Which of the following best describes the primary role of cellular respiration?
- To eliminate waste products from the body.
- To breakdown food fuels and capture energy in ATP. (correct)
- To synthesize proteins from amino acids.
- To store excess glucose as glycogen.
What is the final product of glycolysis that proceeds to the next stage in cellular respiration?
What is the final product of glycolysis that proceeds to the next stage in cellular respiration?
During which stage of metabolism is carbon dioxide (CO2) released?
During which stage of metabolism is carbon dioxide (CO2) released?
Which of the following is the primary goal of cellular respiration?
Which of the following is the primary goal of cellular respiration?
What is the destination of hydrogen atoms removed during the oxidative breakdown of stage 2 products in the mitochondria?
What is the destination of hydrogen atoms removed during the oxidative breakdown of stage 2 products in the mitochondria?
In the context of metabolism, what is the role of the citric acid cycle and oxidative phosphorylation?
In the context of metabolism, what is the role of the citric acid cycle and oxidative phosphorylation?
How are nutrients transported to tissue cells during the initial stages of metabolism?
How are nutrients transported to tissue cells during the initial stages of metabolism?
How does energy not immediately used by the body get stored for later use?
How does energy not immediately used by the body get stored for later use?
Flashcards
Metabolism
Metabolism
Sum of all biochemical reactions inside a cell involving nutrients.
Anabolism
Anabolism
Synthesis of large molecules from small ones.
Catabolism
Catabolism
Breakdown of complex structures into simpler ones.
Cellular Respiration
Cellular Respiration
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Cellular Respiration Goal
Cellular Respiration Goal
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Metabolism Stage 1
Metabolism Stage 1
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Metabolism Stage 2
Metabolism Stage 2
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Metabolism Stage 3
Metabolism Stage 3
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Glycolysis
Glycolysis
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Citric Acid Cycle
Citric Acid Cycle
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Study Notes
Metabolism
- Nutrients extracted from food are used to provide energy.
- Metabolism refers to all biochemical reactions inside a cell involving nutrients.
- Anabolism is the synthesis of large molecules from smaller ones, such as protein synthesis from amino acids.
- Catabolism is the breakdown of complex structures into simpler ones, like breaking down proteins into amino acids.
Cellular Respiration
- This is how the body derives energy from food and is comprised of three catabolic processes.
- Glycolysis
- The citric acid (Kreb’s) cycle
- Oxidative phosphorylation
Goal of Cellular Respiration
- To trap chemical energy in ATP.
- Energy can be stored in glycogen and fats for later use.
- An example reaction is: glucose + oxygen yields carbon dioxide + water + energy (ATP)
Three Stages of Metabolism
- Stage 1: Digestion and absorption occur in the GI tract where nutrients are digested into absorbable units, and then absorbed into the blood to be transported to tissue cells.
- Stage 2: Takes place in the cytoplasm of tissue cells.
- In anabolism, nutrients are built into lipids, proteins, and glycogen.
- In catabolism, nutrients are broken down into smaller particles, such as pyruvic acid.
- Stage 3: Takes place in the mitochondria and is mostly catabolic.
- Requires oxygen and releases carbon dioxide.
- Results in a large amount of ATP being created.
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