Metabolism is the sum of all chemical reactions. Match the following with the type of metabolism absorbing monosaccharide’s in the small intestine neither catabolic nor anabolic [Choose] breaking down glucose to produce ATP anabolism neither catabolic nor anabolic catabolism joining glucose to form polysaccharides breaking down fats to produce ATP catabolism breaking down muscle protein to produce free amino acids catabolism breaking down fat stores catabolism using amino acids to synthesize new proteins anabolism transporting nutrients in the bloodstream neither catabolic nor anabolic Question 7 Which of the following are true of metabolism vitamins are a main source of metabolic energy metabolic pathways are controlled by hormones metabolism stops during resting periods as well as during fasting and starvation metabolic pathways always generate ATP some metabolic reactions use energy to synthesize materials vitamins and minerals can assist enzymes in metabolic pathways some metabolic reactions can produce energy for the body metabolic pathways always require ATP Question 10 0.5 pts Your body adapts to periods of feeding and fasting. Match the events with the circumstance relative to the last meal eaten. glucose in the liver and muscle made into glycogen [Choose] [Choose fatty acids converted to triglycerides and stored in adipocytes 8h after eating 1h after eating amino acids converted to glucose by gluconeogenesis prolonged fasting (more than 18h) pyruvate converted to glucose [Choose] 7 formation of ketone bodies [Choose breakdown of fat Choose] breakdown of muscle protein to be converted to glucose [Choose]
The Correct Answer and Explanation is :
Let’s address the questions one by one:
Matching Metabolic Processes:
- Absorbing monosaccharides in the small intestine: is process is neither catabolic nor anabolic; it’s a form of nutrient absorption where monosaccharides like glucose are transported into the bloodstream without altering their chemical structure. Breaking down glucose to produce ATP: Thiis a catabolic process known as glycolysis, where glucose is broken down to release energy in the form of ATP.
3.Joining glucose to form polysaccharides:** This ian anabolic process called glycogenesis, where glucose molecules are linked together to form glycogen for energy storage.
- aking down fats to produce ATP: This is a*catabolic** process known as lipolysis, where triglycerides are broken down into fatty acids and glycerol, which are then used to generate ATP.
- Breng down muscle protein to produce free amino acids: This is a tabolic process called proteolysis, where proteins are degraded into amino acids.
- Breakidown fat stores: This refers to catabolic** processes like lipolysis, where stored fats are mobilized and broken down for energy.
- Using amiacids to synthesize new proteins: This is an anaboc process known as protein synthesis, where amino acids are assembled into proteins.
- Transportingtrients in the bloodstream: This process is neier catabolic nor anabolic; it’s a form of nutrient distribution where substances are carried to various tissues without chemical alteration.
True Statements ab Metabolism:
- Some metabolic reactio use energy to synthesize materials:
- True. Anabolic reacts reire energy input to build complex molecules from simpler ones.
- Vitamins and minerals asst enzymes in metabolic pathways:
- True. Many vitamins and mials t as coenzymes or cofactors, aiding enzymatic reactions in metabolism.
- Some metabolic reactions canodu energy for the body:
- True. Catabolic reactions break n colex molecules, releasing energy that the body can use.
Matching Events with Fasting/Feedingates:
- Glucose in the liver and muscle made into glycogen:
- 1 hour after eating. After a meal, excs glucose is stored as glycogen in the liver and muscles.
- Fatty acids converted to triglyceridand stored in adipocytes:
- 1 hour after eating. Postprandially, surps fatty acids are esterified into triglycerides and stored in fat cells.
- Amino acids converted to glucose by glueogenesis:
- Prolonged fasting (more than 18 hours). Duri extended fasting, the body synthesizes glucose from amino acids to maintain blood sugar levels.
- Pyruvate converted to glucose:
- Prnged fasting (more than 18 hours). In exteed fasting, pyruvate serves as a substrate for gluconeogenesis to produce glucose.
- Formation of ketone bodies:
- Prolongeasting (more than 18 hours). With proloed fasting, ketogenesis occurs, producing ketone bodies as an alternative energy source.
- Breakdown of fat:
- **8 hours after eating.Several hours post-meal, the bo begins mobilizing fat stores for energy as insulin levels decline.
- Breakdown of muscle protein to be converted to gluc:
- Prolonged fasting (more than 18 hours). In extended fastg, muscle proteins are broken down to provide amino acids for gluconeogenesis.
Explanation:
Metabolism encompasses all chemical reacts in the body, divid into catabolic (breakdown) and anabolic (synthesis) processes. Catabolic pathways, such as glycolysis and lipolysis, degrade cex molecules like carbohydrates and fats to release energy, primarily in the form of ATP. Anabolic pathways, including glycogenesis and protein synthesis, ume energy to construct complex molecules from simpler ones, facilitating growth and repair.
The body’s metabolic response varies with feeding and fasting stat ortly after eating, insulin levels rise, promoting anabolic activitiike glycogen and fat synthesis for energy storage. As time progresses without food intake, insulin levels decrease, and catic processes become predominant. Initially, glycogen stores are utilized for energy. Once these are depleteypically after about 8 hours, the body shifts to bing down fat stores through lipolysis. In prolonged fasting (beyond 18 hours), gluconeogenesis becomes crucial, conveg amino acids and other substrates into glucose to maintain blood sugar levels. Additionally, ketogenesis occurs, producing ketone bodies from fatty acids as anernative energy source, especially vital for brain function during extended periods without food.
Understanding these metabolic processes is essential for comprehending how the bomages energy resources, maintains homeostasis, and adapts to varying nutritional states.