Chapter 8: Metabolism Flashcards
- all chemical reactions that take place in cells to break down or build molecules
- Anabolism or catabolism
Metabolism
- a series of linked reactions, each catalyzed by a specific enzyme
- produce energy and cellular compounds
Metabolic Pathway
When we eat foods, it is digested to smaller molecules
- polysaccharides
- lipids
- proteins
As the glucose, fatty acids, and amino acids are broken down further, _____ is ______
energy is released
What happens to the energy from our foods since we do not use it all at once?
we store energy in the cells as high-energy adenosine triphosphate, ATP
ATP is later broken down obtain energy to do work in our bodies:
- contracting muscles
- synthesizing large molecules
- sending nerve impulses
- moving substances across cell membranes
Metabolism involves:
- Catabolic reactions
- Anabolic reactions
It break down large, complex molecules to provide energy and smaller molecules
Catabolic reactions
It uses ATP energy to build larger molecules
Anabolic reactions
Stages of Metabolism:
Catabolic reactions
Stage 1: Digestion and hydrolysis
Stage 2: Degradation
Stage 3: Oxidation
It break down large molecules to smaller ones that enter the bloodstream
Digestion and hydrolysis
It breaks down molecules to two- and three-carbon compounds
Degradation
________ of small molecules in the ____ ____ ____ and _______ _______ provide ATP energy
- Oxidation
- citric acid cycle
- electron transport
As long as the cells have oxygen, the hydrogen ions and electrons from the ______ _______ are transferred to electron transport to synthesize ATP
reduced coenzymes
Adenosine triphosphate (ATP)
- is the energy form stored in cells
- is obtained from the oxidation of food
It consists of adenine (nitrogen base), a ribose sugar, and three
phosphate groups
Adenosine triphosphate (ATP)
